Date: Thu, 15 Sep 1994 20:36:58 -0400 (EDT)
From: Andrew Sinclair-Day <sinclair@pcnet.com>
Subject: Quadra 630 TV/Video review

  I recently purchased the Apple TV/Video System for the Quadra 630 
and thought I'd share my experiences with it, this should also apply 
to the Preforma and LC models. Before buying the Quadra 630 and the 
video system, I owned a Quadra 660av and will make some comparisons 
between the two.

  WHAT YOU GET for $249.
           A Manual (clear and well written).
           1 Disk with the Apple Video Player extension & application.
           1 CD-ROM with Avid VideoShop 2.0 and upgrade coupon to 3.0 
           1 Screw.
           1 Remote control w/ battery (cool!).
           1 Cable/Antenna Tuner Card.
           1 AV Card w/S-Video IN, Composite Video IN,Stereo Sound IN 
           1 Warranty Card.
 
   INSTALLATION was very simple and took about 5 minutes and involved 
removing the back plate on the Q630, removing 2 screws, and sliding 
the motherboard out. The AV card goes in the Video slot on the mother 
board and installs in seconds, it is secured by the screw that came in
the box. The motherboard is slid back in the case and fastened by the
2 screws. Next to the monitor port are 2 screws on a rectangular 
plate which must be removed, the plate comes off and inside is a 
ribbon cable that attaches to the Tuner card. The card is slid in the 
hole and secured by the 2 screws. At this point you attach your cable 
TV or antenna cable to to the card and put the back plate on.  Now 
hook up all the other cables and install the software. If you have a 
VCR or Camcorder you can hook it up to the AV card.

   THE REMOTE CONTROL will turn the Qaudra 630 on/off, mute the sound,
change channels, adjust the volume, turn the video software on/off, 
toggle the video display size, and has controls for the internal 
CD-ROM allowing you to play, stop, eject, pause, forward and reverse 
tracks on audio CD's.  It's very small and light, about 2"x3"x 1/4", 
and is a Sony remote (model RMC-A1). If you have a Sony TV w/ remote 
in the same room as the Quadra 630, you may run into problems as it 
emits the same infrared signals as the Apple remote. If you turn off 
your TV, you can also turn off  your Mac or if you use the remote to 
turn the Mac on you will also turn your TV on.  However there is an 
option to disable the Apple remote, and you can always use the 
keyboard or mouse to do everything.

   SOUND from the Tuner or AV card is passed through the Q630, like it
is with the CD-ROM, so it's not limited to 22MHz 8bit stereo unless 
you are recording the sound or are using the internal speaker on the 
Q630. I recommend getting external stereo speakers or hooking the Q630
up to your stereo system.  What I really like about the sound on the 
Q630 is the ability to have 3 different sound levels, one for the CD 
Audio, one for the TV/AV cards, one for all system sounds.  Setting 
these sound levels is done through the sound control panel under 
volumes. So if you are listening to a CD  at a loud volume and the Mac
makes a system sound it won't blast you out of your seat. All three 
sound levels can  be active at the same time, meaning a CD can be 
playing, the Mac can be making noise,  and watch TV. I have the TV and
CD volumes set high and the system volume kept low.  When I had the 
Quadra 660av there was no control over this, so if  you were listening
to a CD at a loud volume and the system beeped you were blasted by 
that beep. No More. ;-)

   APPLE VIDEO PLAYER software allows you to watch TV, view video from
a VCR or camcorder , capture still frames and record QuickTime 
movies. 
  The Channel Setup option is very straight forward. Here you choose 
what type of signal you are going to be using (antenna, cable, HRC 
cable), then choose the auto add option, this will scan your cable and
add all channels that have a signal, including scrambled channels. 
You can then go and remove any scrambled channels if  you want.  A 
nice feature is the ability to give each channel a name, for instance 
channel 31 can be named CNN. Channels can also be assigned passwords 
to eliminate children (or adults) from watching stuff they shouldn't, 
but removing the channel preferences file circumvents this.
  TV Reminders allows the Video Player software to remind you when 
certain programs are on. It will even turn the the TV tuner on , or 
give you a reminder 5 minutes before the program is due to air. 
  The Control Window is where everything can be fine tuned. The video 
source can be selected (TV, Video, S-Video). Brightness, sharpness and
tint adjusted. Sound sources selected (Mono, SAP, Stereo) as well as 
balance, bass and treble. Closed captioning is also supported (Off, 
CC1, CC2, Text1, Text2) in windows 320x240 and larger. 
Capture options include freeze frame, save still image, and movie 
capture. If using the Apple Video software to capture QuickTime 
movies, there are only three compression settings (None, Normal, and 
Most). Also the video input standard can be set (NTSC, PAL, SECAM). 

  The video viewing size can be anywhere from 160x120  to 640x480, and
is always in 16bit color regardless of what bit depth your monitor is
set to. With the Quadra 660av, the monitor had to be set to a depth 
of 256 colors or less in order to view video, while with the Quadra 
630 you can be in thousands of colors and still view video. The 
quality of the video display is also better on the Quadra 630. The 
Quadra 660av displayed it's video on the monitor in an RGB signal, 
while on the Quadra 630 it is displayed in a YUV signal which is what 
your TV uses. The result is a crisper, cleaner image with less color 
bleading. The quality of the image once it is above 320x240 in size, 
employes a scheme called pixel doubling, meaning that every 1x1 pixel 
now becomes a 2x2 pixel area. The result is a coarser image, but it's 
really not that bad, especially if you are a few feet away from the 
monitor. The Pixel doubling scheme is much better on the Quadra 630 
than it was the Quadra 660av. 

 Video capture frame rates using the Apple Video Player are 17fps at 
160x120 and 12fps at 320x240 with sound (there is no option to disable
the sound, you can mute it though) and it is caputered to the 
hardrive with no option to capture to RAM. I haven't used VideoShop 
for capturing yet, but it should be about the same rates for capturing
to the hardrive, though it does allow capturing to RAM and the 
ability to disable sound thereby increasing the frame rate.  
  When I use Premiere 4.0 to capture video, I set the image size to 
320x240 and the capture frame rate to 5fps with no sound. My VCR (JVC 
HR-D820U) can play back video in slow motion at 5 frames per second 
and this is what I capture. I then set the playback rate to 600% and 
make the movie and it comes out to 30fps. Then I go back and record 
the sound and insert it and re-record the movie. This is the only way 
I know of to capture 30fps quicktime in a decient size window without 
investing an arm and leg in additional hardware.

   I am very pleased with the Quadra 630 and the Apple TV/Video 
System, much more so than I was with the Quadra 660av. I would 
recomend the TV/Video System to anyone who wants to get started in 
Quicktime, or likes to watch TV, especially while getting work done. 
;-)


Andrew Sinclair-Day  |  The Rock Garden      |  Between the brain that plans
Sinclair@PCNET.COM   |  982 State Street     |  and the hand that builds,
AndrewSD@EWORLD.COM  |  New Haven, CT. 06511 |  there must be a mediator.

From: florin@quartz.geology.utoronto.ca (F. Neumann)
Subject: Comparison of Zip and EZ-135 drives

This is the second (and hopefully the last!) revision of my comparison of the
Zip and EZ drives. I corrected a very confusing typo (thanks to Dan Hoefferth
for pointing it out) and I removed the rumour about Zips causing problems with
internal CD-ROM drives. (I've had many messages from people working with such
configurations telling me they had encountered no problems whatsoever.)


Zip vs. EZ-135: A Comparison
============================

version 1.1

This is a comparison of two low-capacity low-cost mass storage devices,
Iomega's Zip drive and SyQuest's EZ-135 drive. The comparison is based on
opionions of users of both drives sent to me by e-mail, and also on some
information pulled from www pages. It was compiled by Florin Neumann
<florin@quartz.geology.utoronto.ca>.

This file is formatted as setext. It can be read with any text editor,
but a setext-compatible browser, such as Akif Eyler's EasyView, is
required for full benefits of the setext format.


Summary
-------

If ease of use, portability, cross-platform communication, and
availability are important, then Zip would be the better choice.

If speed, cartridge capacity, and flexibility in integration with other
SCSI devices are important, and if you're willing to put up with
waiting for back-ordered cartridges, and if megabyte/$ is important to
you, then the EZ would be the better choice.

Putting it in another way, if I had a PowerBook or a low-end system,
and/or I wanted the user-friendliest drive, and/or I wanted to make
sure that I could exchange data with more people, then I'd get a Zip.
But if I had a higher-end system, with several devices on the SCSI bus
and I wanted to keep all my options open as to how to id them, and if I
really cared about speed and capacity, but I didn't mind having to go
through a convoluted ritual each time I swapped a disk, then I'd get
the EZ.


Personal Opinion
----------------

After reading all the opinions sent to me, and after trying out both
drives at a local dealer, I decided on the Zip drive. The main reasons
were:

(a) price (the drive is cca. US$20 cheaper; the cartridges cca. US$5
    cheaper);

(b) availability (no dealer I contacted had EZ cartridges in stock; I had
    no real trouble finding Zip cartridges);

(c) convenience (mounting/dismounting a disk on the EZ is a real hassle
    compared to the Zip, which behaves just like a floppy).

(d) better software driver (not only it uses less memory, but it is also
    present as an application, which allows for mounting the disks even
    when the Mac is booted with extensions off).

As to the Zip's shortcomings, this is what I think:

(1) Capacity (96M vs 126 of the EZ). Sure, larger disks would be nice,
    but one can't have everything.

(2) Speed. Doesn't bother me; I intend to use it mainly as a back-up
    device, but it can be used as boot device or to run applications.

(3) SCSI ID. No problem. All my other external SCSI devices can by set to
    any SCSI ID, so it doesn't matter (SCSI ID numbers have no connexion
    to physical position on the SCSI bus).

(4) No ON/OFF switch. Couldn't care less. I use a power centre for my Mac
    and external drives anyway.


Comparison
==========

Technology
----------

EZ  Hard disk technology. Re-engineered Winchester-type SyQuest
    mechanism.

ZIP Combination of flexible and hard disk technology. Does not use
    Iomega's proprietary Bernoulli technology.


Compatibility with Other Formats
--------------------------------

Both the EZ and the Zip read/write only their own formats. They are
not compatible with anything else. The EZ cartridge looks like a SyQuest
270 cartridge, but it can't be read in a SyQuest 270, and the EZ can't
read SyQuest 270 cartridges.

One respondent mentioned that Compaq is poised to come out with a drive
that will read 1.44M floppies, as well as a new 100M format, but he
oubted that this new drive would become available for the Macintosh.


Reliability
-----------

Both drives seem to be very reliable. I haven't had a single bad report
on either of them; but it's early days yet...

EZ  Based on the SyQuest technology, which has a known track-record;
    in general it is fairly reliable as a back-up and temporary storage
    device, but not as a primary storage device.

ZIP Based on new mechanism, without a known track-record. However,
    Iomega is known as a reputable company, and its Bernoulli drives
    are considered to be technically excellent (but use different
    technology).


Availability
------------

EZ  Drive available by mail order and from dealers. Cartridges more
    difficult to come by, only by mail order or from selected dealers.
    Back-ordered at every dealer I checked with.

ZIP Drive available by mail order, from dealers, and from computer
    superstores. Cartridges readily available from the same sources.


Comparative Cost
----------------

DRIVES      EZ is $20-$50 more expensive than the Zip, depending on source.

CARTRIDGES  EZ cartridges are $4-$8 more expensive than Zip cartridges,
            again depending on source. In megabyte/$, EZ cartridges are
            about 120% more cost-effective than the Zips.


Speed and Capacity
------------------

CARTRIDGES  EZs format to 126M; Zips format to 96M.

DRIVE       EZ av. access time is 13ms; Zip av. access time is 30ms; in
            practice the EZ is 50% to 80% faster.


Size
----

DRIVE       EZ is bulkier and heavier than the Zip, and can only be used
            in horizontal position. Both use external power sources, which
            are pretty heavy themselves.

CARTRIDGES  Both are 3.5'' diameter cartridges. EZs are about 4 times
            thicker and somewhat heavier.


On/Off Switching
----------------

EZ  Has on/off switch.

ZIP Doesn't have on/off switch; is on as soon as the power source is
    plugged in.


SCSI Cable
----------

EZ  Has standard 50-pin SCSI connector. Can be connected to the Mac with
    the usual 25-to-50-pin SCSI cable, or to other SCSI devices via
    50-to-50-pin SCSI cable.

ZIP Has non-standard 25-pin SCSI connector. Can be connected to the
    Mac with a 25-to-25-pin SCSI cable (supplied). Requires 25-to-50-pin
    SCSI cable (like the one used to connect the Mac to the SCSI chain)
    to connect to other SCSI devices.


SCSI ID
-------

EZ  Can choose any legal SCSI ID number, but ID button is flimsy and
    hard to reach.

ZIP Can only choose between IDs 5 and 6, but ID button is easy to use.



Swapping Cartridges
-------------------

EZ  Inconvenient. Behaves like a standard SyQuest drive. Have to
    dismount, spin down, and manually eject the cartridge.

ZIP Convenient. Behaves like a floppy. Drag to trash and it ejects
    automatically; likewise upon shutting down the Mac.


Software Driver
---------------

EZ  Rather poorly designed.

ZIP Well designed. "Guest" option allows installation of driver in
    RAM for temporary use on other Macs than the owner's. It also 
    allows for the mounting of ther disk even if the Mac was booted
    with extensions off. (Something Apple should imitate for their 
    CD-ROM drives, which can't be mounted whent the Mac is booted 
    with extensions off.)


Bundled software
----------------

EZ  Not good, except Silverlining Lite, included on EZs ordered from
    La Cie.

ZIP Mediocre.


Use as a Boot Device
--------------------

Both can be used as start-up disks.


Customer base
-------------

Zip has wider customer base than the EZ, but it has been out half a year
earlier. It has caused more of an impact in the Mac market than the PC
market, but I've seen some local PC dealers offering Zips; I have seen
none offering EZs.

Also PowerComputing is offering as an option internal Zip drives with
their PowerMac clones.


Cross-platform communication
----------------------------

EZ  ?

ZIP Can read PC-formatted Zip cartridges with PC Exchange, although
    Access PC may be more reliable.


Rumours
-------

(I had no way to check these, so I put them in as I received them.)

EZ  "EZ 135 platters are Syquest 270 platters that failed the quality
    checks on one side of the platter"


WWW Information Sources
-----------------------

*  MacWeek Zip Review

http://www.zdnet.com/~macweek/mw_041795/rev1.html

*  MacWeek EZ Review

http://www.zdnet.com/~macweek/mw_09-04-95/rev2.html

*  Zip Technical Specifications

http://www.iomega.com/zspecs.htm

*  EZ Technical Specifications

http://www.syquest.com/syquest/ezspecs.htm

*  Zip Propaganda

http://www.iomega.com/zipdrv.htm

*  EZ Propaganda

http://www.syquest.com/syquest/corp3.htm

*  Unofficial Zip Drive FAQ

http://cnct.com/home/steveg/zipfaq16.html

*  Unofficial SyQuest FAQ

http://www2.csn.net/~kassj/SyQuest.html

*  Unofficial Iomega Page

http://www.stern.nyu.edu/~jwu/iomega.html


Acknowledgment
--------------

The comparison is based on information received from the following
Info-Mac subscribers (many thanks, folks!).

     Chris Eliot
     David Croze
     David J. Swift
     Dean Johnson
     Fred J. Berg
     George McClelland
     Greg Delisle
     Greg Vaughn
     Hugh Vidos
     Jim Hill
     Jimmy Wu
     Larry Pickett
     Michael B. Dixon
     Michael Peirce
     Moshe Sadofsky
     Pat Ullmann
     Patrick Atherton
     Sanjay Mathur
     Shih-Tung Ngiam
     Stephen Bennett
     Tim Lewallen
     Dan Hoefferth
_________________________________________________________________________

-- 
  Florin Neumann
  florin@quartz.geology.utoronto.ca

Date: Wed, 20 Jan 1993 22:55:29 -0600 
From: cbrinson@nwu.edu (L.C. Brinson)
Subject: [*] nsf flat-panel display pr 

This is an old press release from NSF, but one that I didn't see appear on
the virtual pages of info-mac.  Here it is now.

Warren Kibbe    cbrinson@nwu.edu        GEnie: W.Kibbe  AOL: WAKibbe

Title  : RESEARCH BREAKTHROUGH FOR FLAT-PANEL DISPLAY DEVICES ANNOUNCED
Type   : Press Release
NSF Org: OD / LPA
Date   : November 30, 1992
File   : pr92102

Mary Hanson                                     November 30, 1992
(202) 357-9498                                      NSF PR 92-102

              RESEARCH BREAKTHROUGH FOR FLAT-PANEL
                    DISPLAY DEVICES ANNOUNCED

     A recent research breakthrough in reflective, front-lit
displays promises to lead to significant and noticable
improvements in laptop computers and other flat-panel display
devices.

     The prototype liquid crystal display which may replace
today's more bulky and power hungry back-lit displays was
invented by scientists from Ohio's Science and Technology Center
(STC) and the Liquid Crystal Institute.  The National Science
Foundation (NSF) established the STC program in 1987 as a means
to strengthen U.S. economic competitiveness by encouraging
partnerships between the basicascience programs of academia and
industry.  Ohio's STC is one of 25 nationwide, and is located at
Kent State University.

     Like each of the STCs, the one in Ohio was created with a
specific goal in mind; to pursue liquid crystalline research.
The new technology is the result of collaboration by several
scientists working together at Kent State.  It has already
attracted the strong attention of the multibillion dollar display
industry, which anticipates smaller, lighter and more energy
efficient lap top computers and other portable display products
producing remarkably sharp images which can be viewed easily even
in bright sunlight.

     According to Dr. J. William Doane, one of the inventors of
the liquid crystal display, the key to the new technology is that
it does not require back lights.  "Back lights are bulky and
power hungry, draining most of the power from the batteries in
devices like lap top computers," he said.  "Eliminating the need
(for back lights) means a device can run substantially longer and
will be lighter in weight."   Another feature exclusive to the
new technology is that it has full memory; an image will remain
on the screen indefinitely without needing to be "kept alive"
electronically.

     The new material -- named "Polymer-Stabilized Cholesteric
Textures" -- is suitable for use in any flexible plastic display,
from computer screens to signs of every size.  Plastic displays
would be lighter and thus more portable than current liquid
crystal, flat-panel displays, which are made on heavier and
breakable glass.

     Patents have been filed for the new liquid-crystal
technology, which was invented by Drs. Deng-ke Yang and L.C.
Chien, both senior research fellows at the Liquid Crystal
Institute, in collaboration with Doane.

     "Clearly a promising new direction for future flat-panel
display technologies has emerged" from the institute, said Bill
Brinkman, executive director of the Research and Physics Division
at AT&T Bell Laboratories, Murray Hill, N.J.  "While raising
interesting fundamental questions for basic research, Kent State
University's prototype panel . . . has many features we want to
see in future display technologies that are particularly suitable
for portable applications -- light and robust, low power
consumption, and cheaper to manufacture."

     Dr. William Harris, the NSF assistant director responsible
for the Ohio center, said the recent breakthrough demonstrates
how society can benefit when a partnership involving academia,
the state, and the private sector is successful.  "The
achievements by the scientists and students in this STC are
first-rate and indicate the importance of interdisciplinary
approaches to modern science as well as potential long-term
benefits to the nation and to Ohio," said Harris, head of the
Mathematical and Physical Sciences Directorate at NSF.  "When we
are able to encourage cooperation between university research
teams and industry, we are providing a unique training ground for
future scientists and engineers -- the undergraduate and graduate
students."

     Harris added that, in addition to training future leaders,
such cooperative efforts can also directly benefit industry.
"When breakthroughs of particular importance (such as the liquid
crystal display) are made, the NSF-supported activity contributes
to the marketplace because the result has the potential to
generate technical employment in the private sector."

                              -end-

Date: Thu, 17 Feb 1994 19:49:29 +0100
From: martin@luc.ac.be
Subject: PowerBook 170 screen problem (summary)

Dear net,

on my query about a weird PowerBook 170 problem, where the screen image
would start dancing around every so often and stop when I gave the machine
a good shake, I got two long answers. Since they are instructive on how to
open an PowerBook without "screwing" something to pieces, I am attaching
them as a report. As it turned out, the problem was the display cable
connector in the screen unit having come loose due to vibrations. Opening
up the screen (by taking out the two screws that have rubber pads over
them) and pushing the connector back in remedied the problem. Thanks to
Keith Owens and Steven Taylor for answering!

Jan M.L.Martin --- martin@luc.ac.be

[archive as /info/hdwr/opening-powerbooks.txt or something]
***CUT HERE***

Date: Fri, 4 Feb 1994 10:13:06 +0100
From: " (Steven Taylor)" <steven.taylor@mrc-applied-psychology.cambridge.ac.uk>
To: martin@luc.ac.be
Subject: PB170 hassles
Mime-Version: 1.0

Hi Jan,

I've had several occasions to open PB170/180s, and it's quite easy for the
Video cable (a ribbon cable) inside to be pulled out on reassembly - the
top half of the case has to be 'hinged' from the front of the machine,
downward, while this raises the back, and induces tension in the ribbon
cable. The wires also carry trackball/keyboard ADB info. You may need to
push the connector back in. If the machine has been installed after
manufacture with the 8Megs, and the Global Village hardware, chances are
that other stuff got loosened too - maybe the HD power cable if the tech
wasn't careful.

Opening the bigger PBs isn't too problematic, provided you have an
antistatic surface and wristband to work with, and I think a T7 and T9 Torx
screwdriver.
Remove the battery to begin with;
There are 5 screws in the case -
a single T7 beneath the 'flap' at the rear of the machine (where ports are at);
4 x T9 screws in the case below.

Once these are removed, and the machine placed with the LCD display down,
in the position you would normally type at, the top half of the case can be
gently removed. You will probably have to be persistent here, because it's
quite stiff; the rear edge will normally release OK, but there are little
'tabs' on the front edge that can only be disengaged by your teasing the
front edge backward. It will release in time.

Now, you'll find the top case can pivot backward and you'll see the ribbon
cable that is the video connector. It may need to be pushed firmly back
into place. (though of course it may not be clear whether it was loose
originally or due to the current disassembly!)

You could now either  reassemble the Mac, or investigate further. If the
latter, the whole top part of the case including the LCD display can be put
to one side if you ease the video connector straight upward (there are not
clips to hold it in, part of the problem really!). There's nothing related
to the Motherboard or HD on this top section. Checkout the other connectors
you can see, and make sure they're tight. (of course how far you're
prepared to investigate is entirely up to you.)

Reassembly is the reverse of the above. It helps if you 'balance' the rear
of the top part of the case on the row of ports at the back of the Mac
(resting in particular on top of the SCSI connector) with the top case at
about 45deg to the horizontal, as this will give you enough slack to plug
the video connector back in. Then 'pivot' the lid downward, and slightly
raise the rear edge (without yanking the cable free) to let you drop the
front edge into its groove, where the tabs will hold it in place. Then drop
the rear down again, and push it slightly - there will be a little
resistance, but will click gently on the left hand side.

Shove the screws back in the lower case, then behind the flap. Replace the
battery (your PRAM will be reset now, so checkout your Control Panels to
restore values).

I hope this is of some help!
Good luck,
Steve

Date: Tue, 8 Feb 1994 16:22:18 -0600 (CST)
From: Keith D Owens <kdowens@tenet.edu>
Subject: PowerBook Problem
To: martin@luc.ac.be
Mime-Version: 1.0

Jan,

It sounds like your PowerBook Screen problem is a loose or ill-fitting
screen cable. There is a ribbon cable that connects the screen display to
the motherboard with a simple plug in connector. It is fairly easy to
check (if you are not faint of heart... i.e. willing to undo a few
screws)  :-)

Undo the four screws on the bottom of the PowerBook (it takes a Torx T-10
size screw bit-available at most hardware stores). Then undo the single
screw that is located right underneath the phone plug (RJ-11 jack) of your
internal modem. It is a Torx T-8 size screw (this small size is available
but harder to find at the hardware store).

STand the PowerBook on its end, with teh back facing you. Have the screen
unlatched and partially opened to give it more stability. Then seperate
the two halves from the back as it is facing you. The front edge of the PB
is hinged, so it will seperate in a V-shape. Only seperate it 2-3 inches,
letting it remain hinged in the front. There is a ribbon cable that your
should be able to see (on my 170 it's white) that runs from the screen
towards the motherboard. Reach in with two fingers and press down on the
connecter to make sure that it is firmly seated and making a solid
connection. That should solve the screen flickering.

On your hard drive, is it a LaCie brand Quantum, or is it original equipment?

Good luck,
Keith D. Owens <kdowens@tenet.edu>

Date: Sat, 13 Mar 93 22:31:40 CST 
From: ehfm@midway.uchicago.edu (Eric Hoffmann)
Subject: AT&T DataPort 14.4K Report 

The AT&T DataPort 14.4K modem has generated a lot of interest on the
newsgroup comp.dcom.modems. An external model of this modem with Class 1
fax capability (including cable and QuickLink II fax software, yech!) is
being advertised in MacWeek (3-08-93) for $299. The offer is only good
through April 30, 1993. If you qualify under the Sysop program, your price
drops to $222. In response to the question recently posted to info-mac, I
sent one reply but thought that it would make more sense to summarize the
postings on comp.dcom.modems and prepare a report on this modem.

I have clipped responses from the following people on comp.dcom.modems 

karl@genesis.MCS.COM
dawson@willard.atl.ga.us
Adam.Frix@p18.f20.n226.z1.FIDONET.ORG
jmcging@access.digex.com

s.frazee@pdnis.paradyne.com   (in charge of the Sysop program)
pato@pdn.paradyne.com         (senior engineer at AT&T Paradyne)

If I missed your posting or if you have testimonials, bug-reports, and
further questions, please send mail to me at ehfm@midway.uchicago.edu

Also included in this report is the Sysop order form.

For a more formal review, check out the March 1993 issue of BoardWatch. The
review begins on page 14, "AT&T intros sysop deal on 14.4kbps modems." I
will include this review if I can obtain permission from Jack Richard, the
editor of BoardWatch.

14,400 Fax external   $299
14,400 Fax internal   $289

Call 1-800-554-4996 and charge it!
Call 1-800-544-4996 ext. 3503 for the dealer nearest you.

I am not affiliated in any way with AT&T Paradyne. Just a satisfied customer :-)

-Eric Hoffmann
 ehfm@midway.uchicago.edu
===============================================================================
                   AT&T DATAPORT 14.4K MODEM REPORT
===============================================================================

This report summarizes the traffic on comp.dcom.modem regarding the AT&T 14.4K
DataPort modems. Additional information should be posted to that newsgroup, or
if that is not possible for you, please forward your replies to my mail address
-- ehfm@midway.uchicago.edu and I will include your report in the next update
of this document.

Who do I contact if I want to place an order for this modem?
-----------------------------------------------------------

- Call AT&T Paradyne at 1-800-544-4996 to place your order.

- Or you may order from Elek-Tek:

  ELEK-TEK
  7350 N. Lindner
  Skokie,  IL   60077

  708/677-7660 [from inside of Illinois]
  800/395-1000 [anywhere outside of Illinois]

-email addresses:

 s.frazee@pdnis.paradyne.com  Scott Frazee is in charge of the Sysop program
 
 Scott Frazee
 AT&T Paradyne
 Mailstop LG219
 8545 126th Ave. North
 Largo, FL  34649

 800/554-4996  (voice)
 813/530-8276  (international callers)
 813/530-2398  (fax)

Reports follow:
--------------

From: Adam.Frix@p18.f20.n226.z1.FIDONET.ORG (Adam Frix)
Sender: ufgate@cmhgate.fidonet.org (newsout1.26)
Newsgroups: comp.dcom.modems
Subject: Report--AT&T Paradyne DataPort 14.4/fax
Message-ID: <1135262.2B9B3BA2@cmhgate.fidonet.org>
Date: Fri, 05 Mar 93 20:25:20 EST
Organization: FidoNet node 1:226/20.18 - cmhGate UF Gateway, Columbus OH
Lines: 94


Well, thanks to this newsgroup our user group just got an AT&T DataPort (tm)
14.4 modem with fax for our BBS.  We got it under the sysop program; I think
$222 is just a _darn_ fine deal.

It seems to be a rock-solid, medium-high-end modem.  I must say that, unlike
the USR products I've come into contact with, its factory settings assume a
cable properly wired for flow control.  (On a Macintosh, this is not a fair
assumption, for we must use specially wired cables that are not readily
available and that not too many salespeople know about, and end up getting
only half the job done anyway--but I digress.)  In addition, there was a
fairly large notice right up front aimed at Mac users, telling us exactly
which extended command to set for Mac flow control.  There was only one.  Nice
touch.  (Trust me, I've tried to explain modem setup and theory over the phone
to more than one novice, whose modem manual is shall we say less than
satisfactory.)

I don't know how well it will work for some of the setups you typically see on
the net; however, it's probably rock-solid for most uses.  It's not filled
with lights on the front, nor any kind of display panel; 7 LEDs, and that's
it.  Therefore, it's probably not for any application which requires careful
and detailed monitoring of what state the modem may be in at any time.

It's been on now for about 24 hours, and the entire case (plastic) is room
temperature, except for a small spot in the middle of the top which is a
degree or two warmer (no more than that).  This is a complete about-face
compared to the Supras and even the USR Sportsters, which generate enough heat
to warm coffee.

It's got what they call an Optical Line Interface, which tells me nothing
except that they're not using standard electronics to match the incoming phone
line with the DSP stuff.  Apparently this technology was designed to enhance
the modem's performance on noisy lines.  If we're lucky, it also means extra
protection against lightning.

The modem comes with a lifetime warranty and toll-free tech support; I don't
suppose AT&T Paradyne is apt to go out of business any time soon, so this is
probably worth something.  And I've seen some of their monster commercial
leased-line modems, so I know they're not newcomers to this stuff like Zoom
and Supra and ZyXEL.

We received the modem very quickly; maybe 2.5 weeks or so after sending in the
application and certified check.  This is in great contrast to the USR "send
us your firstborn, promise us your second, pay us now, and we'll think about
getting back to you at some vague future point" sysop policy.  To be fair I
think USR is busy responding to the heat of competition--they even take credit
cards, now, in 1993--but they're being slow about it, and as much as I wanted
a USR, I more so wanted a good modem quickly, for the sake of our users.  We
looked at the Hayes Optima, for $299, but it uses the AT&T Paradyne
chipset--and so the AT&T was a better deal at the $222 price.

It was interesting how we came to buy this unit.  We had deliberated amongst
the USR, Hayes, AT&T, and Telebit modems, and decided on the Hayes; then, the
day before we sent the check in, I saw the post here on the net about AT&T's
continued low sysop pricing.  I faxed Scott Frazee, the AT&T Paradyne Sysop
Program coordinator, and within about 15 minutes he was faxing me back with a
response.  I had all the necessary papers in my hand shortly thereafter. 
Compare this to Hayes; on a Thursday morning 4 weeks ago I faxed them for more
info, and they haven't responded to this day.  Sometimes, it's the little
things that count.

Right before receiving the modem we received a form letter from Scott Frazee,
telling us that we had been approved for the sysop program.  On top of
that--get THIS--he handwrote a note at the bottom of the form letter telling
me that he's sorry, but there's a shortage of Mac fax software right now, so
it'll be shipping to me shortly.  !!!!!  Can you imagine this?  Not only does
their incredibly good price include Mac fax software, which is absolutely
unheard of (most places want an extra $100 for it), but he takes the time to
let me know personally that he's sorry it didn't ship immediately.  Wow. 
These folks are out to get some business.  I guess it's working, huh?  :-)

If they have a good user group price, I'll not feel badly about recommending
them to our members.  However, I think that these puppies are only available
direct from AT&T, and they list for $550 and sell for $430-$450 through their
regular ads.  That's a buncha money, given that a slightly less than
comparable USR Sportster 14.4/fax sells for $329.  A hundred bucks is a
hundred bucks, and I think this isn't that high end of a modem (even though it
does have configurations for things the commodity modems don't, it doesn't
have as many configurations as a USR Courier, for example).  But I would
definitely recommend it over one of the latecoming commodity modems.

You can contact AT&T Paradyne in Largo, Florida at 813-530-2000.

If anyone has any questions, I'd be happy to try to answer them.  I've got the
owner's manual right here.

Aloha,
--Adam--
 
--  
Adam Frix via cmhGate - Net 226 fido<=>uucp gateway Col, OH
UUCP: ...!uunet.uu.net!towers!bluemoon!cmhgate!20.18!Adam.Frix
INET: Adam.Frix@p18.f20.n226.z1.FIDONET.ORG
Please use bang path until my mail forwarding gets fixed.
---------------------------------------------------------------------------

From: pato@pdn.paradyne.com (Pat O'Horo)
Subject: Re: Report--AT&T Paradyne DataPort 14.4/fax
Message-ID: <1993Mar10.142229.24638@pdn.paradyne.com>
Sender: news@pdn.paradyne.com (News Subsystem)
Nntp-Posting-Host: elvis
Organization: AT&T Paradyne, Largo, Fl.
References: <1135262.2B9B3BA2@cmhgate.fidonet.org>
Date: Wed, 10 Mar 1993 14:22:29 GMT
Lines: 30

In article <1135262.2B9B3BA2@cmhgate.fidonet.org> 
Adam.Frix@p18.f20.n226.z1.FIDONET.ORG (Adam Frix) writes:
>
>
>If they have a good user group price, I'll not feel badly about recommending
>them to our members.  However, I think that these puppies are only available
>direct from AT&T, and they list for $550 and sell for $430-$450 through their
>regular ads.  That's a buncha money, given that a slightly less than
> 
While I believe we do sell these modems through our direct sales force, they
are intended to be marketed through normal (ie distributors) channels.  This
is new to us (Paradyne), but we are progressing nicely.

I checked and we have a special for March and April.
14,400 Fax external   $299
14,400 Fax internal   $289
Call 1-800-554-4996 and charge it!

>--  
>Adam Frix via cmhGate - Net 226 fido<=>uucp gateway Col, OH
>UUCP: ...!uunet.uu.net!towers!bluemoon!cmhgate!20.18!Adam.Frix
>INET: Adam.Frix@p18.f20.n226.z1.FIDONET.ORG
>Please use bang path until my mail forwarding gets fixed.


-----------------------------------------------------------------------
Patrick O'Horo					Voice (813) 530-2608
Senior Engineer					Fax   (813) 530-8224
AT&T Paradyne
8548 126th Ave No.
Largo, Fl 34649
---------------------------------------------------------------------------

From: jmcging@access.digex.com (John McGing)
Newsgroups: comp.dcom.modems
Subject: Re: Report--AT&T Paradyne DataPort 14.4/fax
Date: 10 Mar 1993 14:47:42 -0500
Organization: Express Access Online Communications, Greenbelt, MD USA
Lines: 31
Message-ID: <1nlgkuINNa64@access.digex.com>
References: <1135262.2B9B3BA2@cmhgate.fidonet.org> 
<1993Mar10.142229.24638@pdn.paradyne.com>
Reply-To: jmcging@access.digex.com
NNTP-Posting-Host: access.digex.com

pato@pdn.paradyne.com (Pat O'Horo) writes:

>While I believe we do sell these modems through our direct sales force, they
>are intended to be marketed through normal (ie distributors) channels.  This
>is new to us (Paradyne), but we are progressing nicely.

>I checked and we have a special for March and April.
>14,400 Fax external   $299
>14,400 Fax internal   $289
>Call 1-800-554-4996 and charge it!

>-----------------------------------------------------------------------
>Patrick O'Horo					Voice (813) 530-2608
>Senior Engineer					Fax   (813) 530-8224
>AT&T Paradyne
>8548 126th Ave No.
>Largo, Fl 34649

I have the internal unit and it worked right out of the box (haven't tried
the fax, though).  Great manual, gives me 14.4 connections the Supra could
never lock onto.  I am very sold on this modem.  And if the prices quoted
above are for the public in general, this is one heck of a deal.  

Seriously, it beats the Supra I bought hands down.  

John
-- 
------------------------------------------------------------------
jmcging@access.digex.com   Nobody knows the troubles I've seen...   
woodb!oss2cc!jmcging@soaf1  .... and nobody cares!
J.MCGING on GEnie  70142,1357 on Compuserve     My post, my ideas
---------------------------------------------------------------------------

From: bob@consult.UUCP (Bob Willey)
Newsgroups: comp.dcom.modems
Subject: Re: Report--AT&T Paradyne DataPort 14.4/fax
Message-ID: <1370@consult.UUCP>
Date: 11 Mar 93 04:25:27 GMT
References: <1135262.2B9B3BA2@cmhgate.fidonet.org>
Reply-To: bob@consult.UUCP (Bob Willey)
Organization: CCS Enterprises, Inc.
Lines: 27

In article <1135262.2B9B3BA2@cmhgate.fidonet.org> 
Adam.Frix@p18.f20.n226.z1.FIDONET.ORG (Adam Frix) writes:
>Well, thanks to this newsgroup our user group just got an AT&T DataPort (tm)
>14.4 modem with fax for our BBS.  We got it under the sysop program; I think
>It seems to be a rock-solid, medium-high-end modem.  I must say that, unlike
    < Bunch of stuff deleted.....>

We too have been very pleased with the AT&T DataPort 14.4 modem.
We have had it up about 2 weeks now on our BBS with some pretty heavy
usage and so far, it has done very well.  We have a Practical Peripheral
14400FXSA modem and the AT&T DataPort 14.4 modem.  The AT&T worked better
out of the box and has never missed a lick.  The PPI modem was having problems
with some hispeed connections until recently.  We got the NEW 1.23 ROMs for 
the PPI and now it appears rock-solid.  Right now we can't notice any 
difference between the connections on either node.

The only note here was that someone mentioned that the ROMs in the AT&T
are soldered in, so they are not field upgradeable.  With everyone else
in the market coming out with new ROMs every coupld of months, I am not
sure what this will mean.  Unless AT&T is confident that this modem has
hit the field "perfect in every way".  So far, it has been.....


-- 
>.. Bob Willey, CDP          ..  |  ..  uunet!consult!bob  bob@ccs.com   ..<
>.. CCS Enterprises, Inc.    ..  |  ..   Office: (410) 820-4670          ..<
>.. P.O. Drawer 1690         ..  |  ..      FAX: (410) 476-5261          ..<
>.. Easton, Maryland 21601 ......|......... BBS: (410) 476-5098 ...........<
---------------------------------------------------------------------------

From: karl@genesis.MCS.COM (Karl Denninger)
Newsgroups: comp.dcom.modems
Subject: Re: AT&T Dataport?
Date: 12 Mar 1993 19:23:22 -0600
Organization: MCSNet, Chicago, IL
Lines: 16
Message-ID: <1nrd2a$ruo@genesis.MCS.COM>
References: <1993Mar12.194320.24296@infonode.ingr.com>
NNTP-Posting-Host: localhost.mcs.com

In article <1993Mar12.194320.24296@infonode.ingr.com> keford@infonode.ingr.com 
(Keith Ford) writes:
>
>What is the turn-around time for the AT&T sysop deal?

I got mine in about 5 days.

>How does their Dataport perform?  I've been a USR man
>in the past, but $222 is a good deal for a second line.

I have 4.  No regrets, no problems.  Nice units.

--
Karl Denninger (karl@genesis.MCS.COM) 	| You can never please everyone except
Data Line: [+1 312 248-0900]		| by bankrupting yourself.
         	   LIVE Internet in Chicago; an MCSNET first!

---------------------------------------------------------------------------

From: dawson@willard.atl.ga.us (Willard Dawson)
Newsgroups: comp.dcom.modems
Subject: Re: AT&T Dataport?
Message-ID: <87BD1B6w165w@willard.atl.ga.us>
Date: Sat, 13 Mar 93 16:00:18 EST
References: <1993Mar12.194320.24296@infonode.ingr.com>
Organization: Willard's House BBS, Atlanta, GA -- +1 (404) 664 8814
Lines: 41

keford@infonode.ingr.com (Keith Ford) writes:

> 
> What is the turn-around time for the AT&T sysop deal?
> 
> How does their Dataport perform?  I've been a USR man
> in the past, but $222 is a good deal for a second line.
> 
> -- 
> Keith E. Ford     __
> Intergraph Corp  /  \ Micro Magic BBS 1:373/12  The Dragon Server
> +1 205 730-8614  \__/ sysop@umagic.fidonet.org  server@ingr.com
> fordke@ingr.com  [__] 830-2362 HST/V32bis 9600  "Subject: HELP"


I had mine in under two weeks (like, ten days, I forget...), from the
time I faxed in my application.

I guess I should make a "report" on my experiences with it...

In short, it's a nice little modem, especially compared to the v.32 SFM
it replaces on my BBS.  I do like it, mostly.  But, with just a few
reservations...

I don't like the way the status LED's are recessed, requiring one to
view them from almost straight-on.  Also, if there is a compact way of
dumping the S-regs, I haven't found it yet.  at&v gives an incredibly
long listing, requiring several pages of text.  Nice for the novice, but
not what I need...  What does it take too just get a matrix of data, like
is possible on (even) the Supra and my Telebit?  And, lastly, why, oh
why, could this modem not have been Class 2 rather than Class 1 FAX???

So, despite those two minor quibbles, it's a decent modem, and turnaround
time on the order beats other sysop programs, from what others have said.
Overall, add me to the list of "happy customers."

-- 
dawson@willard.atl.ga.us (Willard Dawson)
gatech!kd4nc!vdbsan!willard!dawson
emory!uumind!willard!dawson
Willard's House BBS, Atlanta, GA -- +1 (404) 664 8814
---------------------------------------------------------------------------

===============================================================================
       ===========   AT&T PARADYNE - SYSOP PRICING PROGRAM   ===========

Please return the completed order form to:

                    AT&T Paradyne
                    c/o Scott Frazee
                    Sysop Pricing Program
                    8545 126th Avenue North
                    P.O. Box 2826 
                    Largo, FL  34649-2826

                    FAX: (813) 530-2398
 

Name of Sysop: __________________________________________________

Company: ________________________________________________________

Business Address: _______________________________________________

_________________________________________________________________

Business City, State, Zip Code:__________________________________

_________________________________________________________________

Business (Voice) Phone Number: __________________________________



Shipping Address (if different from above): _____________________

_________________________________________________________________

Shipping City, State, Zip Code: _________________________________

_________________________________________________________________

Home (Voice) Phone Number: ______________________________________



Name of Bulletin Board: _________________________________________

Bulletin Board Phone Number(s): _________________________________

_________________________________________________________________

_________________________________________________________________

Which BBS software package is being used: _______________________


What type of modem (manufacturer and brand) is currently being 

used: ___________________________________________________________

_________________________________________________________________

How long has the BBS been running: ______________________________

Please leave the current number of active callers and the average

calls per week received by your system: _________________________

_________________________________________________________________

_________________________________________________________________

Is the BBS tied into a Net?  If "Yes", which Net(Fido, WWIV, 

RIME, etc.): ____________________________________________________

What is the BBS' Main Focus (File Exchange, Message Base, 

E-mail, etc.): __________________________________________________

_________________________________________________________________

Is this a Non-profit or Commercial BBS (if Commercial, please 

include your fee breakdown): ____________________________________

_________________________________________________________________

When is the BBS in operation: ___________________________________

_________________________________________________________________



To verify the preceding information, AT&T Paradyne MUST be
provi…

Showing first 20,000 characters of 24,410 total. Open the full document →

From: mem@jhufos.pha.jhu.edu (Mel Martinez x8378)
Subject: [*]Quadra video overview (tech) 
Date: Tue, 14 Jul 92 15:20:11 EDT 

Due to the number of private requests I keep getting for info on the quadra
videos, I can't get any of my own work done!  :)

I am forwarding the following document to the archives.  It describes the
quadra internal video very well and should be very useful to many quadra
owners.  It is written by the designer of the quadra video himself, Dale Adams,
and was originally posted in comp.sys.mac.hardware (I think).

Please archive as info-mac/tech/quadra-video-notes.txt

Mel Martinez
The Johns Hopkins University
Dept. of Physics




-- snip here --

> From: Dale_Adams@gateway.qm.apple.com (Dale Adams)
> Newsgroups: comp.sys.mac.hardware
> Subject: Mac Quadra Video Explained, Part 1
> Date: 25 Nov 91 16:39:34 GMT
> Organization: Apple Computer, Inc.,  Cupertino, CA

Macintosh Quadra Built-In Video, Part 1: Video Architecture

There have been quite a few questions in this (and other) news groups 
concerning the built-in video capabilities of the new Macintosh Quadra 700 
and 900.  In response to these questions, here is the first of three 
articles which provide an in-depth (and accurate!) description of the 
Quadra video capabilities.  This first article discusses a number of 
general Quadra video topics, the second details how to wire the video 
connector sense pins to access all the Quadra's supported video modes, and 
the third describes the memory configurations necessary to support each of 
the video modes at specific pixel depths.  And by the way, I am the 
designer of the video hardware for both Mac Quadras, so this information 
is accurate.

The Quadras were designed with a flexible video hardware section in order 
to support a wide variety of displays.  Since the purchaser of one of 
these CPUs is paying for a frame buffer on the motherboard (whether (s)he 
wants it or not), and since the Quadras were designed to be high 
performance machines, the frame buffer was designed to be both very 
flexible (to support most displays a user may want to use) and to be 
relatively high performance (to match the computer's capabilities).

Obviously every display made by every 3rd party monitor vendor can't be 
supported by the onboard video, but the Quadras do support a much wider 
range of displays at a higher level of performance than any previous 
Macintosh.  The Quadra 700 and 900 support pixel depths ranging from 1 to 
32 bits per pixel (bpp), Apple displays ranging from the 512 x 384 12-inch 
color monitor through the 1152 x 870 21-inch color monitor, pixel clocks 
ranging from 12 to 100 MHz, and a variety of industry standards such as 
VGA, SVGA, NTSC, and PAL.  The Mac Quadra video port produces RS-343 RGB, 
and also provides horizontal, vertical and composite sync outputs.  
Composite or S-video output is not provided, but can be accomplished by 
use of an external RGB-to-composite encoder.  The Quadra 700 and 900 also 
support Apple convolution for flicker-reduction on interlaced displays 
(i.e., NTSC and PAL) at up to 8 bpp.  The Mac Quadras automatically detect 
the type of display attached to the video connector via 3 'sense' pins on 
the video connector.  Depending on the wiring of these 3 pins, software in 
ROM configures the video hardware for one the supported display types.  (A 
full description of sense pin wiring and supported display types is in the 
2nd article.)

The Quadra 700/900 provide the highest built-in video performance of any 
Macintosh CPU to date.  In a (very) simplified graphics model, we could 
say that performance depends on two main factors: processor horsepower and 
the bandwidth the processor has into frame  buffer memory.   These 
machines already have a fast processor - the 68040 - which runs standard 
32-bit QuickDraw.  To provide high bandwidth into frame buffer memory, 
dedicated video RAM (VRAM) was used for the frame buffer, and that VRAM 
was placed directly on the 68040 processor's local bus.  This provides the 
68040 the same access time into frame buffer memory that it has into main 
system RAM.  (Transfer rates can exceed 40 MBytes/sec.)  In addition, 
memory options such as fast page mode are supported, which can improve 
graphics performance for operations such as scrolling, 
offscreen-to-onscreen pixmap transfers, etc.

In a number of cases the design was optimized for high performance over 
low cost.  A good example of this is 32 bpp operation on Apple's standard 
13-inch RGB monitor at 640 x 480 resolution (and this also applies to VGA 
and NTSC), which is probably the most common color monitor in use on the 
Macintosh.  The actual number of memory bytes needed to support 24 bpp is 
640 x 480 x 3 = 921,600.  This would seem to fit within 1 MByte of memory 
(as is the case with the Apple 8*24 video card), but the Quadras actually 
require 2 MBytes of VRAM for this mode.  The 8*24 card supports 24 bpp at 
640 x 480 by using a storage mode called 'chunky planar' to fully utilize 
all its 1 MByte of VRAM.  However, this results in having to perform 3 
separate memory accesses for each 24-bit pixel read from or written to the 
frame buffer.  (This is done in hardware so software only performs a 
single read or write.)  On a NuBus video card, this inefficiency is 
partially masked by the synchronization delays which occur at the 
processor-bus/NuBus interface.  However, when frame buffer memory is 
placed directly on the processor bus, this approach results in a nearly 3X 
performance degradation.  This was judged unacceptable for the Quadras.  
Each 24-bit pixel occupies one longword (4-bytes) in VRAM, so the Quadras 
actually provide 32 bpp for the 640 x 480 resolution.  This pushes the 
memory requirement for this mode over the 1 MByte boundary (640 x 480 x 4 
= 1,228,800 bytes).  Performance is improved still more by another frame 
buffer architectural feature.  Frame buffer memory in the Quadras is 
organized into 4 'banks' of 512 KBytes per bank.  As mentioned earlier, 
Quadra VRAM can operate in fast page mode.  In addition, each bank of VRAM 
operates in fast page mode independently of the other 3 banks.  This 
causes the number of in-page 'hits' to increase, and thus improves the 
effective bandwidth into the frame buffer.  Also, at 32 bpp, 640 x 480 
resolution, each row is set to 4096 bytes, or 1024 32-bit pixels.  Each 
successive row is assigned to a different VRAM bank (modulo 4, of course). 
 This memory organization improves performance during certain commonly 
performed graphics operations such as vertical scrolling.

In any design there are a number of tradeoffs to be made, and this is 
certainly true for the frame buffer in the Mac Quadra machines.  While the 
video does operate at 32 bpp on up to 16-inch displays, it does not 
support 21-inch displays at this pixel depth since this would have 
significantly raised the cost of the motherboard.  (Memory capacity and 
bus bandwidths would essentially have to double, and this would be 
expensive.)  It does support NTSC and PAL timing, but does not provide a 
composite video output.  While it is much faster than any non-accelerated 
video card, there are accelerated video cards that are faster (and much 
more expensive, too, by the way).  A separate graphics processor was not 
added primarily for cost reasons.  However, a graphics processor such as 
the 29000 RISC chip on the 8*24GC card can only speed up the graphics 
operations that it was designed to know about.  If an application program 
bypasses QuickDraw (which is what most Mac graphics accelerators are 
designed to speed up), a graphics accelerator will not improve 
performance, and can actually cause a performance degradation.

Overall, the Macintosh Quadra video provides a reasonable compromise of 
cost, performance, and features, which provides the video needed by the 
majority of Macintosh users at a reasonable price.

The second article will detail the displays supported by the Quadra's 
onboard video, and will explain how to configure the sense pins for each 
of these configurations.


*********************************************************************
* Dale Adams             *   Opinions expressed are not necessarily *
* Apple Computer, Inc.   *   those of my employer.                  *
*********************************************************************
--
 ...Doug Bitting... || "But the wisdom that comes from heaven is first
                    ||  of all pure; then peace loving, considerate,
bitting@cs.yale.edu ||  submissive, full of mercy, and good fruit,
doug@yalevm.bitnet  ||  impartial and sincere."  -- James 3:17
-- 
--
Minnie Mouse is a slow maze learner.


Article 15039 of comp.sys.mac.hardware:
Path: boulder!agate!dog.ee.lbl.gov!network.ucsd.edu!swrinde!mips!spool.mu.edu!yale.edu!cs.yale.edu!bitting-douglas
From: bitting-douglas@CS.YALE.EDU (Douglas Bitting)
Newsgroups: comp.sys.mac.hardware
Subject: REPOST: Mac Quadra Video Explained, Part 2/3
Summary: (Was: Re: Quadra + VGA monitor?)
Message-ID: <1992Feb28.203620.26354@cs.yale.edu>
Date: 28 Feb 92 15:36:14 GMT
Sender: news@cs.yale.edu (Usenet News)
Organization: You gotta be kidding me!
Lines: 223
Nntp-Posting-Host: zoo-gw.cs.yale.edu


Several people have made allusions to the posts from November 1991 by
Dale Adams, the designer of the Quadra's internal video.  As luck
would have it, I did save these out of curiosity.  So, here is a
repost.  It is in 3 parts.  This is part 2.  This is reposted without
permission; I hope Dale doesn't mind.

--Doug

-- snip here --

> From: Dale_Adams@gateway.qm.apple.com (Dale Adams)
> Newsgroups: comp.sys.mac.hardware
> Subject: Mac Quadra Video Explained, Part 2 (long)
> Date: 25 Nov 91 16:58:24 GMT
> Organization: Apple Computer, Inc.,  Cupertino, CA

Macintosh Quadra Built-In Video, Part 2:  Supported Display Configurations

This is the second in a series of articles which describes the 
capabilities of the built-in video of the Macintosh Quadra 700 and 900.

The Quadra frame buffer determines what type of display is attached to the 
video connector by examining the state of 3 sense line pins.  The 
following chart details how these three pins must be wired for each of the 
supported display types.  For each supported display, the screen 
resolution (horiz. pixels  X  vertical pixels), dot clock frequency, and 
the vertical and horizontal scan rates are listed.

Basically, the Quadra 700 & 900 support any display, whether from Apple or 
from another vendor, that meets one of the following specifications:

STANDARD SENSE CODES:
 
                    Sense pins    Hor x Vert     Dot      Vert     Horiz
Display              10  7   4      Pixels      Clock    Refrsh   Refrsh
-----------         -----------   ----------    -----    ------   ------
 
Apple 21S Color      0   0   0    1152 x 870     100       75      68.7

Apple Portrait       0   0   1     640 x 870    57.2832    75      68.9
 
12" Apple RGB        0   1   0     512 x 384    15.6672   60.15   24.48
 
Apple 2-Page Mono.   0   1   1    1152 x 870     100       75      68.7
 
NTSC                 1   0   0  underscan-512x384 12.2727  59.94   15.7
                     1   0   0  overscan- 640x480 12.2727  59.94   15.7
(To produce a color NTSC signal, a RGB-to-NTSC converter is required.)

12" AppleMonochrome  1   1   0     640 x 480     30.24     66.7    35.0
 
13" Apple RGB        1   1   0     640 x 480     30.24     66.7    35.0

Extended sense codes will be examined if the following sense code is 
detected:
                     1   1   1
 

NOTE 1 on above monitors: A sense pin value of 0 means that the pin should 
be grounded to the C&VSYNC.GND signal; a value of 1 means do not connect 
the pin.
 
NOTE 2 on above monitors: sense pins 4, 7, and 10 are referred to as 
SENSE0, SENSE1, and SENSE2 in pinout tables for the video connectors.

NOTE 3: The terms 'underscan' and 'overscan' are used to describe the 
active video resolution for NTSC and PAL modes.  Underscan means that the 
active video area appears in a rectangle centered on the screen with a 
black surrounding area.  This ensures that the entire active video area 
always is displayed on all monitors.  Overscan utilizes the entire 
possible video area for NTSC or PAL.  However, most monitors or 
televisions will cause some of this video to be lost beyond the edges of 
the display, so the entire image will not be seen.
 


EXTENDED SENSE CODES:
 
NOTE for extended sense codes: A sense pin pair value of 0 means those 
pins should be tied together (as opposed to grounding the pins to pin 11); 
a value of 1 means do not connect the pins.  Do _not_ wire any of these 
pins to ground.
 
                   Sense pins    Hor x Vert      Dot      Vert     Horiz
Display           4-10 10-7 7-4    Pixels       Clock    Refrsh   Refrsh
-----------       -------------   ----------    -----    ------   ------

16" Color,
(i.e., E-Machines)  0   1    1     832 x 624    57.2832    75      49.7
 
PAL
PAL has two wiring options, using the extended sense pin configuration.  
To produce a color PAL signal, an RGB-to-PAL converter is required.
 
PAL Option 1        0    0    0  underscan-640x480 14.75   50     15.625
                                 overscan-768x576  14.75   50     15.625
Note: This configuration does not presently doesn't support 24 bits per 
pixel.
 
PAL Option 2        1    1    0  underscan-640x480 14.75   50     15.625
                                 overscan-768x576  14.75   50     15.625
Note: This sense code also requires a diode between sense pins 10 & 7, 
with anode towards pin 7, cathode towards pin 10. 

 
VGA                 1    0    1    640 x 480     25.175    59.95   31.47
 
SVGA                1    0    1    800 x 600       36        56    35.16
To enable SVGA, after configuring and connecting the monitor for VGA, open 
the Monitors control panel and select Options.  Choose Super VGA from the 
dialog and reboot your system.

No external monitor (video halted)
                    1    1    1
  


Here are the Macintosh Quadra video connector pinouts:
 
Pin    Signal          Description
-----  -----------     ----------------------------------------
1      RED.GND         Red Video Ground
2      RED.VID         Red Video
3      CYSNC~          Composite Sync
4      MON.ID1         Monitor ID, Bit 1 (also known as SENSE0)
5      GRN.VID         Green Video
6      GRN.GND         Green Video Ground
7      MON.ID2         Monitor ID, Bit 2 (also known as SENSE1)
8      nc              (no connection)
9      BLU.VID         Blue Video
10     MON.ID3         Monitor ID, Bit 3 (also known as SENSE2)
11     C&VSYNC.GND     CSYNC & VSYNC Ground
12     VSYNC~          Vertical Sync
13     BLU.GND         Blue Video Ground
14     HSYNC.GND       HSYNC Ground
15     HSYNC~          Horizontal Sync
Shell  CHASSIS.GND     Chassis Ground
 
 

If your monitor is a VGA type, you can try the following cable pinouts.
 
Macintosh Quadra                         VGA Connector
DB-15
-------------                           --------------
 
2  ------------------- Red Video ------------ 1
1  ------------------- Red Ground ----------- 6
9  ------------------- Blue Video ----------- 3
13 ------------------- Blue Ground ---------- 8
5  ------------------- Green Video ---------- 2
6  ------------------- Green Ground --------- 7
15 ------------------- Hsync ---------------- 13
12 ------------------- Vsync ---------------- 14
14 ------------------- Sync Ground ---------- 10
10 ------------------|
7  ------------------| Connect 7 and 10 so the sense pin ID will equal VGA
 
There are a few issues to keep in mind with VGA monitors:
 
 * VGA monitors will vary depending on the vendor.  Check with the vendor
   about Macintosh Quadra compatibility before buying, or better yet, 
   actually try the monitor with a Quadra to see if it works and if the 
   quality is acceptable.
 
 * Vendors have different image quality specifications.  There may be
   significant differences between Apple monitors and the wide range of
   VGA monitors.  Do a side-by-side comparison of the monitors you are
   considering before buying.
 
 * Many third party cable vendors have off-the-shelf cables that should 
   work.
 


Most NTSC devices use an RCA-type phono-connector and the following 
diagram uses that as a reference point.  A cable wired as follows may 
allow many different brands of NTSC monitors to work on a Macintosh 
Quadra.  I would advise you to test the monitor on a Macintosh Quadra 
prior to purchase to see if it meets your expectations.
 
Adjust the phono-connector side to whatever type of connector is used 
(RCA, BNC, etc.).  "Tip" is the pin in the center of the connector (the 
signal); the sleeve is flange around the outer edges of the connector (the 
chassis ground).
 
   Card Connector                     RCA-Type Phono-Connector
   --------------                     ------------------------
   4      MON.ID1  (sense0) --|
   7      MON.ID2  (sense1) --|
   11     C&VSYNC.GND --------|
 
   5      GRN.VID  -----------------> Tip (signal)
   Shell  CHASSIS.GND --------------> Sleeve (ground)
 
By grounding pin 4 and pin 7 to pin 11, the Macintosh Quadras are told that
an NTSC monitor is attached.  The actual black and white video signal is 
on pin 5 and connects to the center (Tip) of the phono-plug.  The shell of 
the card connector connects to the sleeve of the phono-plug.
 
To acquire a color NTSC signal from a Quadra (or any Apple Macintosh
display card), an RGB-to-NTSC converter is required, such as those
available from RasterOps, Truevision, and Computer Friends.  Sorry, but I 
do not have the cable requirements for any of these devices.

The third article will detail the amount of VRAM needed for various pixel 
depths for all the display configurations supported by the Quadra onboard 
video.


*********************************************************************
* Dale Adams             *   Opinions expressed are not necessarily *
* Apple Computer, Inc.   *   those of my employer.                  *
*********************************************************************
--
 ...Doug Bitting... || "But the wisdom that comes from heaven is first
                    ||  of all pure; then peace loving, considerate,
bitting@cs.yale.edu ||  submissive, full of mercy, and good fruit,
doug@yalevm.bitnet  ||  impartial and sincere."  -- James 3:17
-- 
--
Minnie Mouse is a slow maze learner.


Article 15040 of comp.sys.mac.hardware:
Path: boulder!agate!ames!elroy.jpl.nasa.gov!swrinde!mips!think.com!yale.edu!cs.yale.edu!bitting-douglas
From: bitting-douglas@CS.YALE.EDU (Douglas Bitting)
Newsgroups: comp.sys.mac.hardware
Subject: REPOST: Mac Quadra Video Explained, Part 3/3
Summary: (Was: Re: Quadra + VGA monitor?)
Message-ID: <1992Feb28.203809.26444@cs.yale.edu>
Date: 28 Feb 92 15:38:04 GMT
Sender: news@cs.yale.edu (Usenet News)
Organization: You gotta be kidding me!
Lines: 106
Nntp-Posting-Host: zoo-gw.cs.yale.edu


Several people have made allusions to the posts from November 1991 by
Dale Adams, the designer of the Quadra's internal video.  As luck
would have it, I did save these out of curiosity.  So, here is a
repost.  It is in 3 parts.  This is part 3.  This is reposted without
permission; I hope Dale doesn't mind.

--Doug

-- snip here --

> From: Dale_Adams@gateway.qm.apple.com (Dale Adams)
> Newsgroups: comp.sys.mac.hardware
> Subject: Mac Quadra Video Explained, Part 3
> Date: 25 Nov 91 17:02:16 GMT
> Organization: Apple Computer, Inc.,  Cupertino, CA

Macintosh Quadra Built-In Video, Part 3:  VRAM Configurations

This is the third in a series of articles which describes the capabilities 
of the built-in video of the Quadra 700 and 900.

The Quadra frame buffer supports a variety of pixel depths, from 1 to 32 
bits per pixel (bpp).  The supported pixel depths (1, 2, 4, 8, or 32 bpp) 
depend on the display resolutio…

Showing first 20,000 characters of 23,637 total. Open the full document →

Date: Fri, 24 Mar 1995 07:39:30 -0500 (EST)
From: Thomas Basil <basil@ward.nadn.navy.mil>
Subject: Mac 1956 Date-Compilation of Answers

Dear Info-Mac:

Below is a compilation of answers received from an inquiry I posted to
INFO-MAC.  I'd asked:

  Can anyone shed light on why a Mac would always reset its date to 8/27/56
  on start-up?  I thought a bad battery would cause date to default to 1904. 
  The 1956 date is popping up on two separate Macs.  Both check out as clean
  under Disenfectant 3.5. Many thanks for any tips or suggestions.

Thanks to everyone for clearing up a mystery.

Tom Basil
basil@ward.nadn.navy.mil
-----------------------------------------------------------------------
Replies received...

From: "Jingcai Zhu (Mizzou1.Missouri.edu)<SNRZHU@MIZZOU1.missouri.edu>

When the battery is dead, not only the date will be reset to 8/27/56 at       
the start up, the color monitor setting will usually go back to B/W also.       
So, change a new battery will solve the problem.                                


From: zeev fraenkel <FNFRANKL@WEIZMANN.weizmann.ac.il>

you have a bad battery in both your computers. i have a classic II and
when it reverts to the date of 1956 i know its time to replace the battery.
for some reason this already happened to me twice despite the fact that
the battery is supposed to last 6 years and my mac is barely 4 years old.
something is wrong somewhere but it is not enough of a bother to do
something about it, so i replace the battery and forget about it.
i wonder how widespread this problem is. replacing the battery
in a mac II takes 5 minutes.                        zeev fraenkel


From: Matthew Damo Alverson <alverson@cs.unca.edu>

I just recently had this problem myself but along with I also had all my
presets changing, In particular my default printer was no longer coming up
as the default, and my system beep was not what I had set it as.  So
everytime I turned on my mac I had to select chooser and select my printer
again.  Then I noticed that the documents I had worked on in the last week
were dated 1956.  I replaced the battery and that fixed both problems. 


From: Benjamin k Grossman <bgrossman@sparky.lkwash.wednet.edu>

No, some newer Macs hit other dates, I think this is one of them.


From: Roy Cruz <rcc@mozcom.com>

I discovered the problem around two years ago and I even asked Apple
support (through Applelink) but all they suggested was it could be the
battery or a virus.  This bug appears on different Mac models, System 7.x
(I haven't tried using 7.5.1 on those Macs yet), and reformatting and
installing System software from the CD won't help. Also, aside from the
date and time other parameters are being reset on my old Mac like the 32
bit addressing and color.  Last year, however, I noticed that it happens
to me (and to others I know) when a certain SCSI device is connected. Do
you have an external hard disk connected? If so, have you tried
disconnecting it temporarily to see if the problem occurs?  There's a
solution though that I hope will also work on your Mac. Try not
disconnecting your Mac from the power line even if your Mac is turned off.
If your Mac is connected to a surge protector, don't turn its switch off
after turning off your computer. Please mail me if this helps or if you
got a better solution. This mystery has been bugging me for quite a long
time. 


From: Matthew Damo Alverson <alverson@cs.unca.edu>

My mac is a classic II also, it is not a hard job but does require two 
special tools.  A nine inch long ?allen? wrench and a clamp that is used to 
spread the case apart.  To open the case remove the four screws in the 
back two are back in the handle grip (a pain to get to but can be done 
with either a long ?allen? wrench or a long torx driver.  Once the screws 
are out the casing needs to be pried apart.  The necessary tools can be 
ordered for $6.95 + $3.00s/h from MacConnection or most likely any other 
mac catalogue.  The battery is located (with the back of the machine 
towards you) in the far right corner.  The battery is 1/2 AA battery I 
purchased mine from my local computer store for about $10.00 but these 
people are always over priced I suspect you can most likely find it cheap 
else where.  They told me a battery last about 3 years.


From: Glen Hoag <glenhoag@nuance.com>

Try the battery, especially if the Mac is a couple years old. A dead
battery will cause the clock to power up to some default state.  I have
seen other reports of certain models coming up with a date in the 1950's. 
You might check to see if other settings are retained, such as the mouse
tracking speed. If not, the signs are even stronger that it's a dead
battery.

Date: Fri, 30 Sep 1994 08:09:54 -0400 (EDT)
From: Andrew Sinclair-Day <sinclair@pcnet.com>
Subject: Quadra 630 Review

           A review of the Macintosh Quadra 630

  In August of 1994 Apple Computer Inc. released a new line of their 
popular Macintosh computer. The models introduced are the Quadra 630, 
LC630, Performa 630, Performa 630CD, Performa 635, Performa 636, and 
the Performa 636CD. All the models are similar, such as case design, 
hard drive capacity, and ports, but there are some differences. The 
Quadra 630 is the only model to have a full MC68040 with the floating 
Point Unit(FPU) for math intensive tasks and is geared towards 
businesses. The LC is for the educational market and the Performa 
models are for the consumer channels and come in many different 
configurations. This review will focus on the Quadra 630, but should 
also apply in part to the LC and Performa models.

What you get for $1189 (street)
     1 Quadra 630 with 4megs Ram, 250meg IDE Hard Drive, 1.44mb floppy
     1 Apple Desktop Mouse II
     2 Power Cables (why 2?)
     System 7.12P or System 7.5 (depending on when purchased)
     2 Manuals (Getting Started, Macintosh Reference)
     1 Apple Resource Guide
     1 Warranty registration card
     System Disks
     EWorld software installed on the hard drive
     
The Specs
  The Quadra 630 is powered by a Motorola MC68040 with FPU running at 
33MHz (a tad slower than the Quadra 950), according to Apple it is a 
33/66MHz chip. What this 33/66 marketing gimmick means is that the 
internal sync clock is running at 66MHz and the system bus is running 
at 33MHz. This new terminology has caused allot of confusion, one 
salesman at a local computer superstore swore that it was a 66MHz 
machine and you could switch between the 2 speeds (really!!) . Not so.
 

  4MB DRAM on the motherboard.
  1 72-pin DRAM SIMM socket (80ns or faster, up to 32MB).
  1MB ROM.
  1MB video memory (not expandable).
  1 LC compatible  PDS slot.
  1 Communication slot for modem or Ethernet card.
  1 Video slot with DVA for a video input card.
  1 internal port for a TV tuner card.
  1 internal 250MB IDE Hard Drive.
  Energy Star compliant
  The ports on the rear of the unit include an ADB port, two serial 
ports, monitor port, SCSI port, 8bit mono sound input and 8bit stereo 
output ports. The motherboard slides out the rear of the unit, making 
upgrades very easy. The front of the unit has the SuperDrive, space 
for an internal CD-ROM, and three new features. These features are 
Up/Down volume buttons, a Headphone jack and an infrared sensor (for 
Sony remotes). An internal Power Supply will take line voltages from 
100-240 volts AC. Power consumption of the Quadra 630 is 45 watts. The
case design is unique in that it is made up of 5 stylish plastic 
panels that snap on a solid metal frame, the Q630 weighs in at 17 lbs.
 (7.7 kg) and measures 12.6S x 16.5S x 4.3S.  

SET-UP
   Setting up the Quadra 630 was straightforward, take the computer 
out of the box, attach the power cable, keyboard, mouse and monitor 
and turn it on. The system software as well as E-world comes 
pre-installed on the hard drive, though the system software also comes
on floppy disks. The Quadra 630 came with System 7.12P and a coupon 
for a TfreeU ($10 shipping) copy of System 7.5. Quadra 630Us shipping 
now should have System 7.5 installed. I did encounter one problem 
setting the Mac up, and that was when I installed Ram Doubler 1.5 
(more on that later). 
   I have just installed System 7.5 and it runs much faster than 
System 7.12P, though in itUs basic configuration it uses 2.5MB of ram.
 

THE IDE HARD DRIVE
    IDE stands for Intelligent Drive Electronics, and the Quadra 630 
is the first desktop Macintosh to use this technology though it has 
been used for years on DOS computers. The internal IDE drive is 250MB 
in size and has an access time of around 15ms (my old Quadra 660avUs 
internal drive had an 18ms access time). There are two hard drive 
formatters included on the Disk Tools floppy, Apple HD SC Setup for 
SCSI drives, and Internal HD Format for IDE drives. The IDE formatting
software works much like itUs SCSI counterparts, though partitioning 
is not available. I have only run across two programs that do not work
with the IDE drive, one being SCSI evaluator (still works with SCSI 
drives that are hooked up), and Mac Bench 1.1 (when it preforms tests 
on the internal HD it freezes).  I have heard of some programs that 
format or test SCSI drives which will not work with the IDE HD, but 
this seems obvious. Those worried about seeing an IDE drive on a 
Macintosh need not worry, it works fine and youUll not even notice 
that itUs IDE. 
   I have an APS 105MB Syquest hooked up to the external SCSI 
connector and it works flawlessly, and IUd swear itUs now quicker than
when on the Quadra 660av. 

SOUND
   Sound input through the sound-in jack is limited to 8bit 22KHz 
mono. Sound output is 8bit 22KHz stereo. If you have an internal 
CD-ROM or TV/Video System, then the sound is passed through and up to 
16bit 44KHz stereo sound output is available. Also with the TV/Video 
system you can record Quicktime movies with stereo sound. A nice 
feature if you have the Apple TV/Video System and the internal CD300i+
is that you can have 3 different volumes levels, one for the CD, 
another for the TV, and one for system sounds. 

VIDEO
   The 1MB of internal video DRAM is capable of supporting monitors up
to 16inches (832x624) at a depth of 8bits (256 colors). At 640x480 it
can display up to a 16bit depth (thousands of colors). The Video DRAM
is not expandable, so if you require a larger monitor or a 24bit 
(millions of colors) display, a PDS video card is required. The speed 
of the display is slightly faster than  the Quadra 605. According to 
SpeedOMeter though, the Quadra 630Us display is  faster than the 
Quadra 660av, though I have my doubts about this. Ram Doubler will 
degrade the video performance by up to 34% depending on what bit depth
is selected.

MISCELLANEOUS FEATURES
   Energy Star compliance is a feature that I have longed for. Using 
the CPU Energy Saver control panel, the idle time before the machine 
shuts itself off can be set, anywhere from 15 minutes to twelve hours.
Also specific times and dates can be set as well for the shut off. 
The control panel can also be set so that it will not shut down if the
modem is going,the busy cursor is on or a sound is playing . Another 
control panel, Auto Power On/Off can be used to turn the computer on 
at specific times and dates, or if there has been a power failure it 
can turn the mac on again. 
   An infrared remote can be used to turn the mac on/off and adjust 
the volume. Any Sony TV remote should work. If you have the TV/Video 
system the remote can be used to control the CD, change channels, 
adjust the volume, mute, run and quit the video software.  
    The Video slot has a provision for a DVA connector if you are 
using the Apple Video System. DVA (Digital Video Analog Audio) is 
similar to the DAV slot on AV Macs, the difference being with the 
sound. Nothing at the moment is  available for the DVA connector, but 
IUm sure cards will come out offering features such as MPEG playback, 
and full screen full motion video recording and output at or near 
broadcast levels. 

UPGRADE OPTIONS
   Apple Express modem card $199
This fax/modem card is based on AppleUs Express modem and supports 
speeds up to 14.4bps and fits in the communication slot.

   Apple Video System $149
The Video System card plugs into the video slot and provides composite
video-in, S-VHS video-in, and stereo sound-in. It can be used to 
capture still images or QuickTime movies. Also included is AvidUs 
Videoshop 2.03 software on CD-ROM. 

   Apple TV/Video System $249
This is a two card package and includes the Video System card as well 
as a cable/TV tuner card and an infrared remote control. The tuner 
card plugs into a special ribbon connector near the top of the Quadra 
630Us case. Also included is AvidUs Videoshop 2.03 software on CD-ROM.
 

   Apple Presentation System $299
The presentation system is a small box that plugs into the monitor 
port, allowing output to a TV or VCR. Other features include video 
mirroring, PAL & NTSC output, composite and S-VHS output connectors.

   Apple Ethernet card $99
There are two types of Ethernet cards available. 10BASE T (twisted 
pair) and 10BASE 2 (thin coaxial). Either of these two cards go into 
the communications slot.

   Apple PPC upgrade daughter board $n/a
This card will supposedly offer a 66Mhz PPC 601 processor in a 
daughter card which plugs into the 68040 socket. The 68040 plugs into 
the PPC card, and you can switch between the two processors (not on 
the fly).  It will require System 7.5 . No price has been set ($599 is
what I hear), or release date (October?).

   MPEG Card $n/a
This fall an MPEG playback card is slated to come out for the Quadra 
630. It will supposedly offer 24bit video, CD-i compatibility, as well
as MPEG support. It will plug into the PDS slot and Video/DVA slot( 
if you have the Video System, there is a DVA pass through connector on
the card). Price, probably in the $300 range. 

SHORTCOMINGS & PROBLEMS
   I like to Quadra 630 but there are a few shortcomings and I had a 
problem with Ram Doubler. It seems that when I installed the Ram 
Doubler 1.5 software, it trashed my finder, causing the Quadra 630 not
to boot up. The solution was to boot up with the Disk Tools floppy 
and drag the Finder and System suitcase to the trash, and then 
re-install the system software. I re-installed Ram Doubler 1.51( the 
latest update) and it works fine (sort of) with no noticeable slowdown
of the CPU, FPU or disk, though it does degrade video performance by 
as much as 34%!!!  This could be due to the video DRAM being similar 
to the conventional memory. 
   I would have liked to see two DRAM SIMM sockets on the 
motherboard, there is defiantly room for two, hopefully a SIMM doubler
or stacker will come out to solve this. (Apparently some Quadra 630Us
have started to appear with an extra SIMM socket, this extra socket 
is for the video DRAM, as there is none on the motherboard on these 
models. The beta units did have this extra video  SIMM socket, but the
unit I have does not. )
   The limitations of the 1MB of internal video memory, while the itUs
adequate for a 14S display in thousands of colors, any larger display
is only 256 colors and only up to 832x624. A larger display will 
require a video card in the PDS slot. 
   The 8bit mono sound input really bothers me, granted I can get 8bit
stereo sound-in but only with the addition of the TV/Video card. I 
would have paid an extra $50-$100 for 16bit sound. 
   Overall I am quite pleased with the Quadra 630 despite the few 
shortcomings. All the software I had on my old system works fine and I
have not had any real compatibility issues besides Ram Doubler. 
Compared with the  Quadra 660av which I owned before this, the Quadra 
630 out preforms it and is very STABLE.

   If you are interested in a review of the Apple TV/Video System for 
the Quadra 630, it can be found at:  
gopher://sumex-aim.stanford.edu/info-mac/info/hdwr/quadra630-tv-video-
review.txt

Andrew Sinclair-Day  |  The Rock Garden      |  Between the brain that plans
Sinclair@PCNET.COM   |  982 State Street     |  and the hand that builds,
AndrewSD@EWORLD.COM  |  New Haven, CT. 06511 |  there must be a mediator.

Date: Sun, 6 Jun 1993 01:10:15 -0700 (PDT) 
From: Guy Kuo <guykuo@u.washington.edu>
Subject: quadra-700-clock-mod-145 

quadra-700-clock-mod-145.txt

Text file for tech folder which describes technique for changing Quadra
700 clock speed. This version includes cooling fan installation, custom
speed oscillators, thermal data, caveats regarding socket pins, and
performance data. At the time of posting, the author has reports of 33
Q700's modified in this way. Some have been running this way for months
without additional cooling. Three machines required cooling for
accelerated operation.

----------
This procedure should only be attempted by users experienced in circuit
board fabrication and repair. You must desolder a component on a
multi-layer motherboard. Such boards are fragile and expensive to
repair. This is NOT a good first soldering project. The process
voids your warranty. If you are not dissuaded by the above, read on
and see how a $5.00 part can bring your Quadra 700 up to Quadra 950
performance.

The Quadra 700 has been successfully accelerated by exchanging its
CPU clock oscillator for a higher frequency unit. The original
oscillator is a 50 MHz unit from which is derived the 25 MHz and
50 MHz clocks used by the 680RC40 processor. Speeds up to 33 MHz
are usually attained with new oscillators. Higher speeds are
attainable by some individual motherboards. One can reasonably expect
to attain 30 MHz. Higher speeds are likely but not guaranteed. There
is a small chance that your particular motherboard is incapable of
higher speed.

Of the 33 Quadra 700's reported to or modified by myself the results
are:

35 MHz    2 machines (custom Fox electronics 70 MHz clocks)
33 MHz   17 machines. Two of which reported as unstable until
               cooling fan added
32.5 MHz 12 machines (had 65 MHz clocks available at low cost)
31.5 MHz  1 machine required cooling fan to operate. Higher speed
               testing pending.
Failed    1 machine failed at 33 MHz. Lower speeds not yet tested
          1 machine with a clip on clock oscillator failed at 32
               MHz to properly access floppy drive

Motherboard destructions: 0

Motherboard damages: 2 episodes of plate through hole damage which
    the users managed to solder through.

Unusual problems: 1 motherboard shorted against the case during
          reassembly. A piece of paper between the motherboard and
          case solve the problem.


33 MHz exceeds the manufacturer expected performance of the Newer
Technology Variable Speed Overdrive. Newer guarantees 30 MHz as
attainable by all. Of the five VSO's in Seattle I know about, 31 MHz
has been the recommended speed. Personally, I have run a motherboard
with full stability (except 24 bit video) at over 35 MHz. 24 bit video=20
instability at accelerated speeds prompted me to swap motherboards. My
second motherboard has a top stable speed of 30.5 MHz with a VSO. 24
bit stability was not attained until I slowed to 30 MHz. This very same
motherboard is running rock solid at 33.3 MHz & 24 bit video is working
very well. Apparently, the machine finds a true clock oscillator more
palatable than the VSO's synthesized clock. This suggests that speeds
over 30 MHz will be more easily attained using true clock oscillators.
This observation is confirmed by two other user reports.

The VSO is more expensive but does not require warranty voiding=20
board modifications. I also market a clip on clock modification which
uses a true clock oscillator which has a solder free installation.
However, I recommend a true soldered installation for highest
reliability. Clip on mounts are primarily for users wary of voiding
their warranty. One user of my clip on had floppy access problems.
It is unknown if that machine would have done better with a soldered=20
installation, but I would not be surprised.

As new user reports arrive, I shall add them to this info file.

Although machines will run more rapidly, this modification pushes the
circuits beyond normal operating speeds. Although no reported, long
term failures have occurred on Quadra's due to higher speed operation,
there is a possibility of shortening the lifespan of components on
the motherboard. I have run my Q700 at accelerated speeds for almost 10
months and have not had a board failure. Others have run their VSO's
longer. Given this, I doubt this is a very high risk. On the other
hand, the machine may be more prone to system crashes. In my experience,
this has not been the case. For safety reasons, do not perform this on any
mission critical Macintosh.


PARTS

    Clock Oscillators (4 pin TTL or CMOS in 14 pin DIP form factor)
            Check that you are not receiving the half size package!
            Obtain speeds beginning at 50 MHz and higher as you wish
            to attempt. Reasonable values would be 55, 60, 62, & 66.66 MHz
            units. You might try higher speeds as well. The oscillators are
            typically less than $5.00 each mail order.

            You should include the 50 MHz clock in case you damage the
            original oscillator or wish to plug a 50 MHz unit into your
            socket. The original Apple clock oscillator has an Output
            Enable control on pin 1. The units listed below always have
            output enabled. This is not a problem unless you try to use
            a Variable Speed Overdrive with one of the below clocks.

            I obtained my clock oscillators from DigiKey 1-800-344-4539
            Some of their part numbers are:

                50 MHz TTL Clock Oscillator  (part # X121)
                55 MHz CMOS Clock Oscillator (part # SE1509)
                60 MHz CMOS Clock Oscillator (part # SE1510)
                64 MHz TTL Clock Oscillator  (part # X136)
                66.66 MHz TTL Clock Oscillator (part # CTX137)

            Speeds above 66.66 MHz and up to 70 MHz are difficult to find.
            If you wish to try higher speeds, Fox Electronics 1-813-693-009=
9
            can make 70 MHz clock oscillators on their "Fast Fox" program i=
n
            15 working days. The cost is about $12 each.In ten weeks their
            factory can make any value you wish. Reasonable values to try
            would be 69, 70 and 71 MHz. Ask for TTL in a 14 pin DIP sized
            four pin can.=20

    Socket: Obtain a 4 pin socket which is in the same form factor as
            a 14 pin DIP package. If you try cutting the extra
            pins off a regular 14 pin socket, be absolutely sure
            no remnants of unused pins can short traces on the
            motherboard. Marc A. Tamsky helpfully suggests using a
            needle nose plier to push the pins out of a machine pin
            socket. It tried it and it work well.

            I used 4 machined socket pins cut from a screw machined
            socket. This allows easier removal should need arise.

    Cooling Fan?: A small, 12 volt muffin fan can be mounted on top of
            the CPU heat sink. Obtain one which has dimensions about
            40 mm square for easier mounting.=20

            Newer Technology's Variable Speed Overdrive includes a
            cooling fan. However, most machines with modified clock
            oscillators have survived without a cooling fan.
            James MacPhail measured a 4 degree increase was noted at
            33.3 MHz. See later in this document for more thermal
            information. Additional cooling may not be absolutely
            necessary, but one Quadra 700 which I upgraded to 33 MHz
            failed at that speed after two hours of operation. Adding
            a cooling fan allowed that machine to operate reliably.
            If your machine crashes or locks up after several hours of
            operation, you may improve reliability by adding a cooling
            fan.=20
               =20
            WARNING: Do not let your Quadra 700 run too long with
                     the cover off. It needs the cover on to properly
                     direct air past the CPU heat sink. One Apple
                     source stated that the motherboard is known to
                     die after 20 minutes of open air operation.          =
=20
          =20
          =20
PROCEDURE

1)  Insert usual disclaimer and anti static warnings here. I can take
    take no responsibility for damage you do to your own machine.
    Undertake this modification only if you are well qualified.=20
    PROCEED AT YOUR OWN RISK.

2)  Back up your hard drive. If your Mac is incapable of operating at
    the speed you select, it may trash the data on your drive. See
    the warning by Rainer Menes at the end of this document.

3)  Remove the top lid of the machine. You will see the floppy disk and
    hard drive mounted in a plastic tower. Follow strict anti-static
    precautions and make sure the machine is OFF. Unplug ALL cables,
    wall and monitor power supply cords from the back of the Mac.
=20
4)  Remove the power supply by pulling the plastic interlocking tab on the
    tower forward and simultaneously pulling the power supply straight up.
    The tab is a piece of plastic from the left posterior aspect of the
    tower which extends downward to hook on to the power supply. You may
    also feel a horseshoe shaped piece at the right portion of the power
    supply. Leave that alone. The plastic tab from the tower is all you
    need release.
=20
5)  Look at the rear of the tower assembly. You will see the flat ribbon
    SCSI connector to the hard drive, a power cable and a flat ribbon cable
    leading to the floppy drive. Disconnect all these from the motherboard.
    The hard drive power cable connector has a tab which must be squeezed
    to release it.
                                           =20
6)  Unplug the drive activity LED from its clear plastic mount

7)  Look down the posterior, cylindrical section of the plastic tower. A
    Phillips head screw is at the base. Remove it, taking care not to drop
    it into the case. A bit of gummy glue on your screwdriver is helpful
    here.

8)  Remove the tower assembly by pulling medially the plastic tab on the
    rear right side of the tower. This tab prevents the tower from sliding
    posteriorly. Slide the entire tower assembly 1 cm posteriorly then
    lift the tower assembly straight up and out of the case.

9)  Remove the interrupt switch assembly. It is a strangely shaped plastic
    device at the left, front edge of the motherboard. Pull the middle,
    rear plastic prong up and forward. The entire device will release.
       =20
10) Unplug the speaker cable. Squeeze the plastic tab on the speaker to
    free it. Swing the fan backwards to free it from the case.
       =20
11) Remove the motherboard from the case. Lift the front right corner of
    the motherboard about 1 mm. This allows it to clear the clear plastic
    light guide. Slide the motherboard forward about 1 cm. Be very gentle
    You should not require great force. Once slid forward, the motherboard
    lifts easily out.
       =20
12) Locate the 50 MHz clock crystal. It is a small metal box near the
    CPU chip. Note and remember its orientation. The new clock oscillators
    must be aligned with pin 1 (the square corner) in the same orientation.
    Plug an oscillator in backwards and it will be destroyed.
       =20
    For your information the pin assignments are:


             --------------
            | 14         8 |           1  Ouput Enable
            |              |           7  Gnd/Case Gnd
            |              |           8  Output
            | 1          7 |          14  V dc (+5)
            L--------------

    Very carefully desolder and remove the old clock oscillator. Some of
    the pins may be bent over. Simply desolder then unbend them. Pin 7
    is directly attached to the metal can and absorbs a great deal of
    heat before melting. Be sure your desoldering iron is hot enough
    before doing pin 7. It is reasonable to desolder the other pins
    first. NEVER use any force on the motherboard. The oscillator should
    practically fall out on its own.

    Tip: Put a small amount of soldering flux on the joints before
    desoldering. This can greatly speed the process, especially on pin 7.=
=20
      =20
13) Install your socket or socket pins where the old oscillator once was.
    If you are using socket pins, simply put them on an oscillator and
    use the oscillator to hold them in place while you solder the pins.

    WARNING: If you use plain socket pins, leave the leads of your clock=20
    oscillators long enough to keep the can from touching the pins and
    shorting out the circuit board!

14) Put a 50 MHz clock oscillator into the new socket. You could use the
    old clock but it has solder on its pins. This can come off inside the
    socket and cause corrosion problems later. I suggest using a new
    50 MHz clock. NEVER plug the old clock oscillator into plain socket
    pins. The leads are too short to keep the can off the pins.
      =20
    Again, watch the orientation of the oscillator when you plug it in. It
    goes in the same orientation of the other clock oscillator next to=20
    your new socket. Reversal will destroy the clock oscillator.
=20
15) Install your (optional?) cooling fan system to complete the
    modification. I used two 1 1/4 inch sheet metal screws through the
    fan's mounting holes and into the gaps between the fingers of the
    heatsink to hold the fan in place. Power was tapped from the hard
    drive's 12 volt line on its power cable. This is the yellow or orange
    wire on the harness. Ground is either of the middle, black wires.
    If the fan is too noisy, try tapping the +5 supply (red) instead.
    The fan will run quietly and slowly but will move enough air to
    cool the CPU. Some of the very low profile fans will not run on +5.
    I place four 1/4 watt resistors which have been wired in parallel
    with each other in series with the fan's 12 volt supply for that
    type of fan.
       =20
16) Reinsert the motherboard and slide it into place.

17) Snap in the interrupt switch assembly and speaker to lock the mother
    board firmly. Plug the speaker wire back into the motherboard.
       =20
18) Reinstall the tower assembly by first placing the right wall of the
    tower against the right wall of the case with the tower assembly about
    1 cm posterior of its intended position. Lower the tower assembly into
    place while maintaining contact with the right wall of the case.
    Once fully down, slide the tower assembly anteriorly until it clicks
    into place.
       =20
19) Reconnect the motherboard ends of the cables. DON'T FORGET THE    =20
    FLOPPY DRIVE CABLE.

20) Replace the Phillips head screw

21) Drop the power supply straight down into place until it clicks in.

22) Plug the hard drive activity light back into its clear plastic mount.

23) Reattach your cables and power cords. Cross your fingers and turn=20
    on the Mac. It should make the usual power on chord. If it doesn't,
    immediately turn of the power and recheck your work. If all is not
    well, you have my sincere condolences. Please report your failures
    to the network. The information may help someone else.
       =20
    Hopefully, all will work normally. Turn the machine back off and
    replace the 50 MHz clock oscillator with a faster one. Reboot and
    be astounded.=20
       =20
    You must run the machine for many hours before deciding
    a particular speed is truly usable. With my VSO, a machine lock-up
    could take 8 hours of operation to occur. In the brief time since
    modifying my clock oscillator (one week) I have not had a single
    problem.
       =20
Thanks to Rainer Menes, whose comp.sys.mac.hardware article prompted me
to try this modification. Thanks also to the following for submitting
reports allowing me to summarize the success rate of this procedure:

    Guido Paccagnella <guidop@conicit.ve>
    James MacPhail <jmacphai@cue.bc.ca>
    Charles Grosjean <charlesg@cco.caltech.edu>
    "Stuart R. Harper" <stuart%lorelei.ECE.Drexel.EDU@cbis.ece.drexel.edu>
    Rainer Menes <menes@statistik.tu-muenchen.de>
    "Eric D. Kemp '94" <edkemp@COLBY.EDU>
    Dan Winkler <dan_winkler@genmagic.genmagic.com>
    Rick Botman <rbot@well.sf.ca.us>
    Mark Newman <newman@calvin.fnal.gov> Holy Smokes!
    Doug_Steinfeld@vos.stratus.com
    Dustin Boyette <ldg@rock.concert.net>
    "Marc A. Tamsky" <banzai%cs@hub.ucsb.edu>
    Yushi Kaneda <kaneda@loki.stanford.edu>

Good Luck to all who attempt this modification. There is a small but real
risk, but you will likely reach Quadra 950 speeds or higher with less than
$50 in parts. My personal Q700 at 33.3 MHz with an external memory cache
benchmarks faster than a 950. I pass this information along as a very
pleased techie.

Guy Kuo <guykuo@u.washington.edu>

BTW: This same type of mod works for the IIsi, IIfx, Q900, Q950, Centris 61=
0
and Centris 650.
---------------------------------------------------------------------------
And now an important caveat from Rainer Menes

From: menes@statistik.tu-muenchen.de (Rainer Menes)
Subject: WARNING: Q700 clock upgrade to 33MHz
Keywords: test your machine very carefull!!!!
Date: 10 May 93 08:43:41 GMT
Organization: Technische Universitaet Muenchen, Germany

Hi all,

Yesterday I have encountered on the Q700 of a friend of mine some very stra=
nge
problems. It looks as if the RAM on the motherboard (80ns DRAM) isn't able =
to do
33.33 MHz) Sometimes it fails and may damage your hard disk or what ever. T=
his
problem varies from board to board. Mine works perfectly under any tested c=
ondition
with 33.33 MHz.=20

So here my warning:

TEST your upgraded Quadra 700 very carefully. Run it under full load a mini=
mum
of 24 hours with, for example, a POVRay picture, which uses most of the
components in your Quadra 700 (CPU, FPU, SCSI, DRAM, VRAM ...). After that =
run a
memory test for another 12-24 hour. If your Quadra doesn't show any problem=
s you can
be 99% sure that it runs at 33MHz. 1% is left over sorry, but no risk no fu=
n.

To be 100% on the safe side make your room a little hotter than normal when=
 you run
the tests. This gives you more security and the 1% probability of problems =
is now
smaller than < 1%.

Another tip, if you have not done a backup of your harddisk do it now befor=
e
you upgrade. This will give you a better sleep with out nightmares.

Good luck for all how have or think about upgrading to 33MHz,

Rainer
---------------------------------------------------------------------------
I include an informative temperature & performance report from James MacPha=
il

Date: Thu, 22 Apr 93 21:53:49 -0700  =20
From: James MacPhail <jmacphai@cue.bc.ca>=20
Subject: Quadra 700 osc upgrade temp results                               =
   =20


I have done some Q700 CPU temperature measurements using an HP 34401A
DMM with a Fluke 80TK temperature adapter. I placed the temperature
probe on the case of the CPU where it is exposed beside the heat sink,
as this is certainly not the place to measure the temperature most
accurately, the actual conditions are probably a bit hotter than
indicated.

Synopsis: The Q700 has a large design margin for CPU heat dissipation.
Increasing the clock speed by 33% increases the CPU case temp about 4
degrees, indicating an increase in power dissipation of 25%.

Machine configuration: Base machine + four 1M SIMM=D5s, Quantum LP52 drive.
(no additional cards or VRAM).
                                                                           =
   =20

With the box closed in the upright orientation, the equilibrium CPU        =
   =20

temperature was 37 degrees C at 25 MHz, and 41 degrees C at 33.3 MHz.      =
   =20

The temperature rose rapidly when the cover was removed: it was up 8
degrees in 5 minutes (and still rising). Room temp was 21 C (69 …

Showing first 20,000 characters of 22,613 total. Open the full document →

Date: Wed, 8 Feb 1995 19:15:37 -0600
From: kuiyu@mail.utexas.edu (Kui-yu Chang)
Subject:  apple-13in-monitor-fix-r2

Document : apple-13in-monitor-fix.txt
Revision : 2
Date     : 31 Jan 1995
composer : kuiyu@mail.utexas.edu
           CHANG, Kui Yu (Julian)

1  MONITOR
----------
AppleColor 13" High-Resolution RGB monitor

2  PROBLEM
----------
Powers itself off sporadically, green power light goes off with switch still
stuck at 'ON' position.

3  SOLUTION 1
-------------
Adjust the variable resistor on the _back_ panel of the unit.

DETAILS

- On older models, this is simply the topmost control with a
  "mini-sun" icon beside it. 
- On newer models, this is accessible only after removing the
  case. This resistor is labelled "Cut-Off".

The picture brightness level will vary with your adjustments.

COMMENTS

Normally, this solution only works if the problem was caused by a prior over-
adjustment of this particular control/resistor.  My experience with a working
monitor is that if this brightness setting exceeds a threshold, the monitor will
power off automatically. Resetting it to a normal level solves the problem.

For my case, this was not the cause and thus SOLUTION 1 did not work.

4  SOLUTION 2
-------------
Replace the High voltage resistor.
(the 'RED' block, to be called the 'block'henceforth)
This is the big(about size of 2 cigarette boxes piled), red block sitting on the
bottom shield, with 2 suction wires attached _and_ 2 wires soldered to it.
On it is the part no. 1-230-666-21.
One of the suction wires leads to a suction cap on the CRT(Cathode Ray Tube).

DETAILS

You can('might' for option c) get this from:

a) SONY dealer                  $66.68                  1-800-488-7669
   Authentic SONY part # 1-230-666-21

b) Computer Component source    $27.99                  1-800-356-1227
                                                  Fax : 1-800-926-2062
   OEM part, discount of $1.00 for qty of 11 or more.
   Remember to tell them you want a "Macintosh Replacement Part" :
        ORDER #34-480
        APPLE MO401 RGB HIGH VOLTAGE BLOCK  
        PART  #1-230-666-21	
   After you have specified the above info., the sales assistant might ask
   you "Is this a Flyback?". Remember to answer "Yes" although it is not.
   Otherwise the salesperson might say "Sorry we don't have the part".			
   They like to think of this as a "Flyback"

   Note 1 : Next day delivery cost $9.90
   Note 2 : They do handle International Sales, but transaction amt must
            exceed US$250
            (International Voice no. 1-516-496-8780)
            (International Fax no.   1-516-496-8984)

c) Apple dealer
   Apple part # 1-230-666-21, ask for # 34-484

COMMENTS

Some soldering is required(just 1 or 2 wires)

** Remember, it is advisable not to remove the original block before your
receive the replacement block. You might forget the orientation since the OEM
block doesn't look alike.

I ordered my part from b), which is an OEM replacement.
It has exactly the same functionality/dimension but does not look as pretty.

The replacement comes with a suction wire already connected, you plug the
other end onto the CRT. When removing the original cup, you just squeeze it.
There are 2 suction wires connected to the block, one goes to the CRT
and the other connects to a board component(fly-back).
You'll need to remove the Board suction wire connected to the original
defective block. Trick - push the suction wire against the block and then
release, the wire head has 2 ears that hook on to the gaps in the metal socket,
but the whole thing is pressured up with a spring.

After replacing this part, my monitor was up and working again!

5  ADVICES FROM OTHER PEOPLE
----------------------------
Below are abstracts of what people sent me to help, they should give you a
clearer picture.

________________________________________________________________________________
I recently performed some repairs to my Apple color monitor and thought
that I should share my experiences with the net.

I have an apple hi-res 13" RGB monitor.  Lately I've had problems with the
monitor cutting out (turning itself off completely).  This symptom is like
that described in an Apple recall, but my serial number was not included in
the recall.  According to Larry Pina's book, _The Dead Mac Scrolls_, the
problem can be remedied by adjusting a resistor labelled "cutoff".  Making
the adjustment allowed me to use the monitor, but each time I adjusted it
the picture became darker.  On the facing page in Pina's book, he tells
about replacing a high voltage resistor, but doesn't indicate if replacing
it solves the same problem as adjusting the cutoff resistor.  Anyway, I
decided to replace the resistor.  I ordered a new high voltage resistor
From Sony, using the part number in Dead Mac Scrolls.  The part, with
shipping and sales tax, was $62.  This component is the thing that attaches
to the wire with the suction cup plugged into the CRT.  I was a bit nervous
about messing around with the high voltage, but I discharged everything
with a grounded screwdriver.  It took me a little while to figure how to
unplug the suction-cup connector (you squeeze it).  Then, I had to unsolder
two leads and solder in the new part.  That was not too difficult.  There
appeared to be some grease under the suction cup, so I used automotive
dielectric silicone grease (for spark plug wires) when I reinstalled the
new part.  Finally, I reassembled the monitor, held my breath, and turned
it on.  Voila!  It worked.  I readjusted the cutoff resistor back to its
original setting, to make the picture brighter, and the monitor didn't cut
out.  Time will tell if the repair holds, but for right now I'm happy.

I hope these experiences will be useful to someone else.

David Allan
dallan@dow.com
________________________________________________________________________________
If your monitor shuts itself off after a random amount of time, one of the
likely sources of trouble is a defective high-voltage monitor.  This was
covered until March 31 by an unannounced warranty, but no longer.  :(

Before you give up hope, get Larry Pina's book, Macintosh II Repair &
Upgrade Secrets, and read pp. 53-54 for a quick fix anyone can do in 10
minutes that may save you an expensive trip to the shop.

I have repaired dozens of these. There are three common causes for the old 13"
monitor shutting off. two described by Pina, one not.

Symptom: Monitor appears to shut off. Green power light goes out.
-------
1) Adjust the cut-off a smidgen. Described by Pina. Never seen it help.
2) Replace the High voltage resistor block, Sony p/n 1-230-666-21. Has always
fixed this problem.
Expensive part and hard to find. I have 4 left from my old service shop
days. I'll sell 3 for $50 each. Requires soldering.

Computer Component source, 1-800-356-1227, has these for $26.99

Alternate Symptom: Monitor goes black or remains black at power up. Green power
-----------------  light stays on.
Good News: No parts cost. Not documented by Pina. This is usually caused by
cracked solder joints on the small PC board that plugs into
the back of the CRT. Touch up the solder joints, and you're back in business.
:)

Please don't mess with any of this unless you are an experienced hardware
technician with the required skills.
The color screen can retain a 45,000 volt charge if the bleeder resistor is
broken, and can kill you if you have a weak heart.
I do mean to scare you. This really can be dangerous if you do not know what
you're doing.

Jerry Stubbs				Andy Seligman
stubbs@cs.ukans.edu			braintech@aol.com
________________________________________________________________________________
The capacitor a stand alone component that is attached to the bottom shield.
It ties directly into the flyback and then into the CRT. No mistaking it....
It's rectangular in shape and red in color..... It also has one other cable
assy that plugs into the main logic board. Dealer cost for the part is $50.00
but they may not sell it to you. It's suppose to be installed by an
authorized tech so usually it will not be sold over the counter.

Roy H. Robinson
Roy_H._Robinson@onenet.com
________________________________________________________________________________
Thanks to :

wfc@eup.siemens-albis.CH         Wolf Christoph
dallan@na1.dow.com               David Allan
braintech@aol.com                Andy Seligman
Roy_H._Robinson@onenet.com       Roy H. Robinson
stubbs@cs.ukans.edu              Jerry Stubbs
kctg0864@uxa.cso.uiuc.edu        Kung Chyun Tang

and all who helped.