Subject: AV DSP Mini-FAQ v 1.01
From: bdenckla@husc7.harvard.edu (Benjamin Denckla)
Date: 7 Dec 1993 17:43:17 GMT

	This document contains information relevant to the AV Macs, 
especially in relation to the use and programming of their DSP chip.  It 
is the product of my own experience and many helpful responses I 
have received to posts I have made.  I have taken slight liberties in 
editing responses, so what you see below are not always the exact words 
of the contributors to the FAQ.  It is structured in the typical FAQ 
format of question and answer with the questions listed at the 
beginning.  Please write me with any additions to or comments about this 
document.

Ben Denckla
Manager
Harvard University Electronic Music Studio


1. Are modem/fax software and the GeoPort telecom adapter included?
2. Does audio output from the CD have an extra stage of A/D & D/A?
3. Is there an included utility which allows digital recording of part 
of an audio CD to an AIFF file?
4. Is there an included utility which will allow me to play/record 16-
bit, 44.1KHz stereo AIFF files?
5. Is there any digital audio software available for the 660AV?
6. Is there any digital audio interfacing hardware available? (AES/EBU 
<--> DAV  or  AES/EBU <--> GeoPort)
7. What is needed to do DSP programming?
8. Where can I get example code for programs that use the AV's DSP?
9. Where can I get information about the DSP chip?
10. BugLite only supports 32-bit floating point data.  Do I really want 
to use this data type?
11. Can I use Think C to write the Macintosh part of DSP applications?
12. What happens to DSP modules I have written when the hardware 
platform changes (to PowerPC, for instance)?



.c.1. Are modem/fax software and the GeoPort telecom adapter included? 

	The Geoport adapter must be bought separately for about $125. The 
adapter comes with the modem driver software and a complete, user-level 
fax software package.  So you still need to own a separate modem 
communications program.  Contrary to what some documentation says, you 
can do 14.4Kbaud, not just 9600 baud, with the modem.
	As an aside, I would like to point out that though the AV does 
speech generation and recognition right out of the box, it can't do 
modem/fax out of the box.  Frankly I cannot believe that the number of 
users needing speech functions even approaches the number who need 
modem/fax.  A clear case of "Gee-whiz! Bells & whistles! Screw the 
user!" marketing.  Not that the $125 for the GeoPort even compares the 
the $995 for the ARTA toolkit (see below).


.c.2. Does audio output from the CD have an extra stage of A/D & D/A?

	Yes.  Evidence of this appears on p. 39 of Apple Developer Note 
#5, where the L & R outputs of the CD enter a block labelled "analog 
front end" before entering the Singer block.
	John Turpin <turpin@apple.com> confirms this and notes that the 
digital audio output from the CD is not compatible with the singer 
serial data bus.


.c.3. Is there an included utility which allows digital recording of 
part of an audio CD to an AIFF file?

	No.  In order to to this, you need to open a QuickTime-
aware application and select the audio "file" from the mounted 
CD using the File Open menu item.  You'll then get a dialog 
asking for conversion confirmation.  Then you will have a 
QuickTime movie with 16-bit audio which still needs to be 
converted to an AIFF file.  I am not sure if such a utility 
exists, but it seems probable that it does.

James Wang <jwang@soda.berkeley.edu> and <d88-jwa@nada.kth.se> 
contributed to the answer of this question.


.c.4. Is there an included utility which will allow me to play/record 
16-bit, 44.1KHz stereo AIFF files?

	No.  The bundled version of FusionRecorder does allow you to 
record this kind of audio into QuickTime movies, though.


.c.5. Is there any digital audio software available for the 660AV?

slansky_doug@macmail2.rtsg.mot.com (Doug Slansky) replies:
	Contact OSC (800-343-3325) regarding Deck II, a sound editing 
program being upgraded specifically to use the 3210 in the AVs.  See 
MacWeek (10/4/93), page 24 for details.

.c.6. Is there any digital audio interfacing hardware available? 
(AES/EBU <--> DAV  or  AES/EBU <--> GeoPort)

	Open question.


.c.7. What is needed to do DSP programming?

warnergt@cbnewsi.cb.att.com (george.t.warner) replies:
	Tools for DSP development under the Apple Real Time Architecture  
(ARTA) on AV Macs are available for $995 from:

Spectral Innovations
1885 Lundy Avenue, Suite 208
San Jose, CA  95131
408/955-0366
macdsp@applelink.apple.com

	You will need MPW to use these tools. The tools include the AT&T 
DSP3210 assembler, linker/loader, simulator, Macsbug D Commands, Apple 
Snoopy browser/debugger, and Apple BugLite graphical DSP module 
installer. It does not include the C Compiler but as you may have 
already read, the compiler is not very good.  Fortunately, DSP3210 
assembly programming (unlike other DSPs) is very C-like, so getting up 
to speed is not too difficult.  The main part is getting used to the 
latencies involved with the pipelined architecture. 
	Additionally, the AT&T Application Library includes many (about 
100?) useful DSP algorithms (FFTs, FIR and IIR filters) with complete 
source code.  It should sell for about $100.

walter_horat@rasterops.com (Walter Horat) replies:
	Apple got the 3210 tools from AT&T, which were written to use VCOS 
(AT&Ts 3210 realtime O/S).  Apple modified the tools somewhat for use on 
the Mac, and began shipping them to developers.  When Apple realized 
that it might cost money to actually *support* the tools, they foisted 
the tools off on a company called Spectral Innovations (actually not a 
bad choice since Spectral has been doing programming for AT&T DSPs for 
over five years). 
	BTW, the 'C' compiler is a complete piece of shit.  It produces 
some of the worst code I have ever seen (trying to do a matrix multiply 
in 3210 'C' ran 5 times slower than the host 68k on a Quadra 700 - 
rewriting the same in assembler ran 7-8 times *faster*).  If you do any 
serious 3210 programming, you will need to learn 3210 assembler.

Ben Denckla replies:
	I now own the ARTA toolkit and have a few comments about it.  
First of all, a few picky remarks about the documentation.  It comes in 
two parts: 
	A. A big stack of 3-hole punched looseleaf paper, containing about 
10 different sections, only two of which are separated from each other 
in any manner (you have to hunt through and separate out the documents).  
No overall table of contents, not even an overall list of contents.
	B. A spiral bound, bad photocopy of the AT&T DSP3210 manual.  The 
photocopy is blurry and has at least one page out of order (the first 
page of the table of contents, actually).  It's unclear why they don't 
just get some from AT&T since AT&T is willing to send out the real thing 
for free (see below).
	There are only 3 tiny examples of realtime DSP modules included, 
and I believe only 1 timeshare task example exists.  The examples are 
not well-documented.
	The cost is amazingly prohibitive.  If you look at the price of 
APDA developer's toolkits for things like Telephone Manager, Sound 
Manager, or MIDI Manager, they are less than one tenth the price ($75, 
$50, and $35 respectively).  I thought my 660AV was going to be a real 
steal for $1820 + whatever development tools were needed.  Well I had no 
clue that that "whatever" would be $995, more than half of the price of 
the computer itself.  So the 660AV makes a lot of sense: it does speech 
generation and recognition (two capabilites that are really only needed 
for people with disabilities) right out of the box, but you have to pay 
$995 to actually be able to program the thing.  Does the price of such 
DSP development software reflect the fact that DSP programming is an 
esoteric activity, or does it _cause_ DSP programming to remain 
esoteric?  I thought the 660AV was a revolution in bringing DSP 
programming onto the personal desktop.  I was wrong, because the cost of 
the development software shattered the illusion of the bargain.


.c.8. Where can I get example code for programs that use the AV's DSP?

	See question #7 for description of DSP module examples that come 
with the ARTA toolkit.

Author:       George Warner <warnergt@aloft.att.com>
Name:         ARTAbrot 1.1
Description:  Mandelbrot program
Source Code:  Mac & DSP
Location:     sumex-aim.stanford.edu
              archive.umich.edu
              AmericaOnLine
              AppleLink (Developer Code Submissions area)

Author:       Malcolm Slaney <malcolm@apple.com>:
Name:         VUMeters
Description:  simulates analog VU meters
Source Code:  Mac (Think C) & DSP
Location:     ears.atg.apple.com


.c.9. Where can I get information about the DSP chip?

	Call AT&T Microelectronics (1-800-372-2447) and ask for the "AT&T 
DSP3210 Digital Signal Processor Information Manual".  They sent it out 
to me quickly & for free.


.c.10. BugLite only supports 32-bit floating point data.  Do I really 
want to use this data type?

walter_horat@rasterops.com (Walter Horat) replies:
	I used to think the same way before programming on the 3210 (I 
don't need floats, so I'll just program in integer arithmetic).  Once 
you get into the architecture of the chip and the instruction set, you 
realize that it really was designed *only* to manipulate floating point 
data types.  The integer operations which the chip supports are not very 
robust, for instance there is no integer multiply.  But, you can 
effectively convert a 8 or 16 bit integer (in signed, unsigned, u-law or 
a-law format) to a dsp-floating point number in a single instruction 
cycle.  The reverse conversion is just as fast.  And you can convert 
from dsp/ieee and ieee/dsp format in a single instruction (an 
instruction takes four cycles to process, but the 3210 has a four-stage 
pipeline, so instructions effectively complete in 1 cycle)


.c.11. Can I use Think C to write the Macintosh part of DSP 
applications?

Malcolm Slaney <malcolm@apple.com> replies:
	YES!  The VUMeters application [see question #8] was done this 
way. Only the DSP code needs to be compiled under MPW.  The ARTA Toolkit 
does include a good  DSP simulator which definitely makes code 
development easier.


.c.12. What happens to DSP modules I have written when the hardware 
platform changes (to PowerPC, for instance)?

warnergt@cbnewsi.cb.att.com (george.t.warner) replies:
	The DSP3210 will not go away when the PowerPCs come out.  While 
Apple has not yet announced what their plans are, I can say that it is 
very likely that third parties will make plug-in DSP3210 boards for 
PowerPCs not equipped with a DSP.

Date: Wed, 9 Sep 1992 16:13 EST 
From: CDCLARK@INDSVAX1.INDSTATE.EDU
Subject: Planes, X-rays and my Mac (Summary) 

Here's the summary of articles I received today 9-9-92

    I would like to thank all of the follwoing persons for responding to my
query on 
x-rays and macs.  Thanks again for the quotes and personel stories you passed
on. c-

    8 IN%"dy@shire.math.co  8-SEP-1992  Traveling with a Mac
    9 IN%"degroot@ips.id.e  9-SEP-1992  Mac and Airport
   10 IN%"hp48sx@wuarchive  9-SEP-1992  RE: Planes, X-Rays and My Mac
   11 IN%"JM144%MOLECULAR-  9-SEP-1992  Xrays and IIsi
   12 IN%"jensen@itd.nrl.n  9-SEP-1992  Computers thru airport security
   13 IN%"burton@cs.sfu.ca  9-SEP-1992  RE: Planes, X-Rays and My Mac
   14 IN%"grant@itd.nrl.na  9-SEP-1992  Planes, X-Rays and My Mac
   15 IN%"davegrow@tecnet1  9-SEP-1992  [ANS] Planes, X-Rays and My Mac
   16 IN%"herren@middlebur  9-SEP-1992  x-rays & Macs
   17 IN%"EGS2G1B@MVS.OAC.  9-SEP-1992  RE: Planes, X-Rays, and My Mac



I have traveled with both a Mac Plus and a Mac SE/30 and have
never had any problems. They've both gone through X ray machines
and have even been checked as baggage.

Nevertheless, I don't recommend doing either, if possible.
Foreign airlines, like Air France or KLM, seem to
have special handling for fragile baggage, but the domestic
airlines don't.

As for X ray machines, I'm pretty sure you only need to worry
about your hard disk. The other thing I do, when I don't feel
like setting up and turning on the computer, is I back everything
up onto floppy disks. I then send the computer throught the X ray
machine and ask for the floppies to be inspected by hand. However,
I have never had any problem with the X ray machine messing up my
hard disk.

Deane Yang

-----
Hi Chip,

I now nothing specific or general about your "phobias",
I just had my Mac on a plane once. This was going from Zurich to
Duesseldorf (ZRH->DUS). It was a Mac Classic and I carried it
with me... There was no damage (or anthing else worth mentioning)
done to my little friend by the X-rays. Maybe somewhere else
this will be different. (I have no affiliations with X-rays,
am just a satisfied customer.)

Sincerely,
Claas de Groot

-----
I do not think x-rays will harm your monitor any way. x-rays are not
extremely bad for your harddisk and floppies either, as they are
primarly effected by electromagnetic wvaes. The main risk for
floppies/hd is the motors that drive the belt you put your stuff on.
They generate enough electric field to damage floppies.  Also the metal
detector uses simple magnetic fields to check for weapons. It is VERY
bad for floppies. But you may have luck
-- 
Povl H. Pedersen             hp48sx@wuarchive.wustl.edu
HP48sx archive maintainer

All Opinions (C) Copyright the Intergalactic Thought Association
-----

Hi Chip
I live in England and have an SE30. During 1990/1 I travelled extensively-
Germany, USA and Canada.My Mac went through numerous Xrays at: Gatwick,
Heathrow, Frankfurt, Newark and Montreal. No harm seemed to be done at all.
Of course I took the precaution of having all my Harddisk's files on floppy
with me. These were usually passed through too- but the people are far less
suspicious of these than a cased computer.Generally, only the hard disk is
at risk and I've heard that the xrays at most airports won't harm computers
these days. Don't take my word for it though-try it (with full back up)!
All the hassles are a pain, but I feel safer that they're in operation. I had
a bad experience with Newark once: They wanted me to switch on the mac to prove
that it really was a computer and not a bomb. My UK plug to US plug adaptor was
in my (checked in) suitcase, but they insisted that they had adaptors for
"every
place in the world". They hadn't ever seen the UK monster plugs we've got!
(Very
chunky, but also very safe). Because they didn't have an adaptor they let me by
without checking my machine! Now if I were a terrorist...
Anyway, my advice is don't be too paranoid- I know several people who've taken
(compact) macs thru xrays at airports without adverse effects.
Cheers

Joe Makkerh
Wellcome/CRC Institute
Cambridge
UK
-----
Chip,
        Iassume you'll get other responces, but here is my experience
at Washington Dullas Airport.
        I wanted to send an old 512 mac to my sister-in-law with
my wife when she went down to visit.  Put it in carrying bag with extra
padding on the front to protect the CRT, so just put whole bag thru
the x-ray.  I STILL had to get it out and turn it on!!!  The reason
is that the shielding that the STUPID FCC requires to prevent TV
interference (reather than make the TV manufactures make better TVs)
causes the computer to show up as a solid BLACK object!!!! Makes
security people VERY nervious!!!
        I suspect (in fact am sure) you will have the same problem.
Even though I feel sure that the x-ray machines are probably not
harmful to your computer or HD, they almost certianly will show up
as BLACK on the X-ray screen and you will have to show that they
are indeed a computer system.   Just got to plan on taking longer
than usual to check in and get thru security.

        Have a good flight to where ever you are going.

larry
-----

I will be very interested in finding out what you learn.
I left London Heathrow on Saturday with my powerbook, and was told that
absolutely everything had to be x-rayed.  My powerbook survived, but I
was very unhappy about it.  The User's Guide that comes with the machine
says clearly "Do not allow your computer or any hard disk or floppy disks
to pass through X-ray machines."

Warren Burton
Simon Fraser University
-----
I am not sure about the computer materials, but in photography
circles, the old warning was that US machines were generally safe for
passing film through, due to the low level of radiation and frequent
testing of the machines' calibration.  Machines outside of the US
varied quite widely.  The level of radiation was sometimes quite
reasonable, but often it was excessive.  This was blamed on the lower
liklihood that the machines' calibration was regularly tested and had
drifted quite badly.  

Best of luck.
==================================================================
Hopes and wishes, Daffodils and kings...

Leprechaun Liam                                 Grant@itd.nrl.navy.mil
Code 5541, NRL, Wash. DC 20375    (202)767-0552 W    (301)937-2567 H

-----
        Some of your questions have been on my mind as well -- specifically,
do the X-rays have any potential to harm the computer.  As a frequent
flyer and MacPortable (much cheaper - you can get a 4/40 for about $1300 with
2400 baud modem through Sun Remarketing in Orem, UT) owner, I am also
frustrated by the long boot time (made longer by my list of inits).  Here
is your answer:

        1.  Several types of integrated circuits exist.  Nonerasables,
uv-light erasable, and electrically erasable ROMs are available on the
market.  I do not know which are used by Apple, but assume them to be
non-erasables.  The warning you got likely refers to the prominence
of uv-eraseable ROMs in various circuits.  X-rays typically use
ultraviolet (UV) light, and thus can erase this type of chip.  End
result:  a non-functional computer.

        2.  Even if you do send your computer through the X-ray machine,
you will still have to power i up - very likely while a gun is aimed at
you - or surrender it to police.  Your computer's internal wiring, on board
battery, and hard drive will make the "box" in the X-ray look quite bomb-like.
The FAA instructs their inspectors to call appropriate authorities in such
a situation and to detain (often spelled "c-u-f-f") the person carrying
the luggage.

        3.  As for your sccreen, I am uncertain of the risks in sending it
through the X-ray, other than those listed in item 2.

        I agree with the problems you are having, but the airlines are
doing you a big favor.  I know that there was discussion during the Gulf War
on not allowing ANY electronic devices on aircraft.  Sorry the news wasn't
better for you.

                                        - Dave Grow
-----
I trave a great deal with my mac (at various times an SE/30, SE, Plus, mac
IIsi, Powerbook 145, etc.) Like you I was initially reluctant to send them
through the x-rays so I had to set the darn thing up, turn it on, wait for
WAY too many inits to load and then shut it back down. One day my plane was
late for a connection and I simply didn't have time. I was on my way home
so I thought "what the heck, if it's toast when I get home, I'll have time
to fix it."  I got home and it was fine. Since then I've sent hard drives,
monitors, CPUs, powerbooks etc. through on a regular basis and I have NEVER
lost a single bit of information. Your mileage may vary, I always send a
boxes of utility and back-up floppy disks through in my luggage as well as
hand carrying them (so I can just hand them to the inspector to hand
inspect while my computer goes through the machine).

Best of luck in your travels. Backup often and carry backups with you, and
X-Ray away. 

Oh, BTW, I almost always have to fly through Kennedy and LaGuardia if I
want to go anywhere from here in the boonies of Vermont--no problems with
those places either though I haven't flown every single airline at both
airports).

-David
__________________________________________________________________
 David Herren                      |    Internet:  herren@middlebury.edu
 Academic Computing                |    BITnet:    herren@midd
 Middlebury College                |    Applelink: Herren
 Middlebury, VT 05753  U.S.A.      |    Ma Bell:   802-388-3711 x5558
__________________________________________________________________

-----
Chip,

Here's a direct quote from Info World in response to your question about X-Rays
and computers in InfoMac. Please preserve the citation if you use this quote
in your summary.

Good luck,

Phil Harriman
The Getty Center for the History of Art and the Humanities
egs2g1b@mvs.oac.ucla.edu

Glass, Brett. Buyers Advisory: Know how (and from what) to protect your data
when traveling. Info World. 1992 Aug 31; 14(35): 76.

     Q: What things can happen to floppies and laptops passed through metal
     detectors?

A: The metal detector you walk through at the airport, and at some courthouses,
uses a powerful electromagnet (uaually mounted overhead) to detect metal
objects. Fortunately, since the intensity of the magnetic field decreases as
the square of the distance from the source, a floppy disk in your pocket is
unlikely to be affected. And the hard disk in a laptop can withstand much
stronger magnetic fields thanks to its metal case.

Interestingly, the airport device most likely to damage your disks is not the
metal detector the the X-ray machine. X-rays themselves can't erase magnetic
materials, but the transformer that generates high voltages for the X-ray tube
may create a powerful magnetic field. What's more, if your floppy disks are on
the bottom of a bag, they may be carried directly over the hefty induction
motor that drives the moving belt.

Again, it is unlikely that a hard disk will be affected by these fields, but
I have on several occasions lost data on floppy disks in carry-on luggage. I
now keep my floppies inside a ferrous metal cookie tin, which offers some
protection against magnetic fields.$

Thanks again. c-

Date: Tue, 4 May 1993 03:49:58 -0700 (PDT) 
From: Guy Kuo <guykuo@u.washington.edu>
Subject: IIsi-clock-mod-poll.txt 

Report on poll of users who have upgraded their IIsi clock oscillators for
higher speed. Suggest placement in reports folder.

------------------------------
This poll was conducted to help users decide whether or not to alter their
IIsi clock oscillator. I have attempted to gather as many case histories as
possible to find some estimate of success and risk. The number of replies
probably shows how rare this modification is but give the impression that
success rates may be higher than the previous 80% estimate. 25 of 25
machines were able to run at 25 mhz when no add on boards were present.
This is not a scientific survey but it is the best we have to work with.

Thanks to all who contributed to this poll. 


Issues:

        Speed) 25 mhz to 27.5 mhz appears to be the norm for machines
                without add on cards. All reported machines were able to
                use 25 mhz as long as no add on cards were present. Several
                Apple cards were in use. No machine with the Nubus adapter
                was able to go faster than 25 mhz. One wasn't even able to
                achieve 25 mhz with the Nubus adapter in place
        
                At speeds >= 30 mhz, the startup sound may crackle
                and hi density floppy disk problems have been reported.
                
                Note: Unless specifically listed below, machines were not
                        tested with a higher speed clock to failure. Hence,
                        the 25 mhz operational machines may well work at
                        higher speeds.
                        
        Damage) One user reported pulling out the plating of one pad. This
                was repaired and the machine is operational. One other
                reported pulling the pin out of the original clock
                oscillator during desoldering. There is one second hand
                report of a user putting a gash in the motherboard with a
                slipped soldering iron.
                
                No reports of static discharge damage.
                
                No reports of high speed operation causing damage.
                
                Then again, I also don't have any reports from users of
                defective parachutes.
                
        Add on boards) Compatibility appears to be a problem with Apple
                Nubus Adapters. Several other add on boards have been used
                with success. See case histories
                
        Heat Sinks) Virtually all modified machines had a heat sink
                installed. These were often the TO-220 style power 
                transistor type. Some used epoxy. Some used a dab of heat
                sink compound with a dab of cyanoacrylate glue. There was
                also use of a clamp with a bolt through the hole in the
                motherboard.

                James MacPhail <jmacphai@cue.bc.ca> is gathering evidence
                which indicates a heatsink is advisable
                
                
                
Case Histories:        

All speeds are the effective CPU speed (1/2 of clock oscillator). All reported CPU versions were 20 mhz.

1)  27.5 mhz operational. Ran for 10 minutes at 31 mhz before crashing.
    No FPU or other add on card
    Heatsinked CPU only
    On 24 hours/day
    No damage during installation
   
2)  27.5 mhz operational without Apple Nubus adapter. 25 mhz top speed with
        Apple Nubus card installed
    Heatsinked CPU only
    On 24 hours/day
    No floppy problems
    No damage during installation
   
3)  27.5 mhz operational. Unable to boot at 31 mhz
    Heatsinked CPU only
    No floppy problems
    No damage during installation
   
4)  25 mhz operational
    Works with the following two configurations
        
                a)      Realtech FPU adaptor card
                        Realtech Cache card
                        SuperMac 8*24 PDQsi
                
                b)      SuperMac FPU adaptor card
                        SuperMac Video Spigot
                        SuperMac 8*24 PDQsi
                        
5)  33 mhz operational
    Fuzzy startup sound
    Problems with hi density disks

6)  33 mhz operational
    Fuzzy startup sound
    Heat sink on CPU and chip to right of CPU
        
7)  25 mhz operational. Occasional crash at 33 mhz

8)  25 mhz operational.
    Using FPU rated at 16 mhz without difficulty
        
9)  25 mhz operational.
    PDS adapter with a Spectrum 24PDQsi graphics card and a 
    VideoSpigot, a 20MHz FPU
    Heat sink on CPU
        
10) 25 mhz operational. 33 mhz failed after several hours.

11) 25 mhz operational
    5/80+quicksilver/fpu(only upgrade)
         
12) 25 mhz operational. Tried 33 mhz - system won't start. 
    Heat sink on CPU
    Configured with
         RealTech FPU/adapter card
         Supermac 8*24 PDQsi
         Realtech cache.
    CPU on continuously - no problems.
    Floppy works fine at 1.4MB @ 25 mhz
        
13) 25 mhz operational
    Heat sink on CPU
        
14) 25 mhz operational
    Heat sink on CPU
        
15) 25 mhz operational
    Heat sink on CPU
        
16) 25 mhz operational
    Heat sink on CPU
        
17) 25 mhz operational
    Heat sink on CPU
    On 17-19 hours per day
        
18) 25 mhz operational
    Heat sink on CPU + cooling fan
    No floppy problems at 25 mhz
        
19) 20 mhz operational. Bombed soon after startup at 25 mhz with Nubus
      Adapter
    20 mhz rated CPU
    RAM 70 ns in slots, 80 on motherboard
        
20) 25 mhz operational
    Heat sink added to CPU later. No damage while unheatsinked.
    Apple Nubus adapter with FPU installed.
        
21) 25 mhz operational
    Heat sink on CPU
        
22) 25 mhz operational
    Heat sink on CPU
        
23) 25 mhz operational
    Heat sink on CPU
        
24) 25 mhz operational
    Heat sink on CPU

25) 30 mhz operational 5/240 with Nubus adaptor
    Ran 1 week at 31 mhz
    Heat sink on CPU
    Sound does not crackle at 31 mhz
    Floppy drive recognizes HD disks at 30 mhz but will not read properly
    Add on RAM is 70 ns


        
Guy Kuo <guykuo@u.washington.edu>

Date: Tue, 11 Feb 92 17:41:44 PST 
From: bear@tony.ucsb.edu (Cedric Bhihe)
Subject: post this please 

[ Moderator : please post this message in the hardware forum folder under 
heading Radius-Rocket-in-Mac-II.txtS. Thank you ]

For those of you who expressed interest in the Radius Rocket upgrade path for 
the Mac II line, I use a Radius Rocket Nubus accelerator with a pre-release of 
the software v1.3 they call the RadiusWare. Here is what I can share on that 
subject/product.

                                   -o-
If you are thinking about upgrading your Mac II, IIx or IIcx, you have several 
options, not just the Rocket, depending on your priorities: 

a) you can go quadra 700 only if you possess a IIcx, that will give you speeds 
greater than those offered by the Rocket, but not so much greater that it 
should be your only concern (in fact those concerned with speed should either 
go the Next route, or for those spending somebody elseUs money, the Silicon 
route. The quadra offers the advantage of full hardware compatibilty which 
the Rocket does not. It is also more expensive that a Rocket which goes for 
$1,550 before tax these days. But I donUt know much about the QuadraUs so ..

b) you can now buy the Tokamak or the ImpulseTechnology (404/889-8294 in GA) 
68040 products. 
I donUt know anything about the latter. The Tokamak, according to the 
manufacturer, is better designed for similar speed improvement. Both are 
designed for maximum acceleration in CAD and heavy math computation type 
situations. The Tokamak is about $500 more expensive than the 68040 Rocket.
Its advantage is that it stays within Apple's requirements concerning power 
consumption. 
I use my Rocket for Mathematica symbolic calculations with an abundance of 
parameters. So far, using Mathematica 2.0.3, I did see a roughly 4 to 6 fold 
improvement with 7.6 Mb of DRAM on the Rocket compared with 8 Mb on my mother 
board before the upgrade. 
Now that I have 20 Mb on the Rocket card, I will port my Fortran computing 
>From the main frame I use to my Mac II+Rocket. Only then will I know whether 
it is the 'Titan' that Radius claims it is. I expect to be disappointed 
naturally. But the point is it will perform the computing in a *reasonable*i
amount of time. 
I will discuss the specifics of the Rocket below, be patient.

c) Last, you can buy the IIfx upgrade, but I would recommend against it for 
at least two reasons : First, the reason Apple did not make the IIfx an 
integral part of its line of Quadra is that IIfx machines use costly techno-
logy. Apple obviously decided to abandon that commercial avenue. If you happen 
to have a friend who use a IIfx and who has bought SIMMS for it, you know what 
I mean. Therefore the IIfx is a dead-end in terms of product-line. Second, 
buying the upgrade, now priced at about $1700 + the above mentionned SIMMS is 
A LOT MORE expensive than buying a Rocket.
Third, the rocket is faster according to ads and various independent reports 
in the published litterature. I have not checked that myself. 
Period and in memoriam for the IIfx. Amen.

                              -o-
Now comes details on the Rocket :

*price*: I shopped a lot and found $1,550+shipping+tax to be the best price 
in the country. That was in December 1991.

*retailer knowledge*: good in only one instance, which was Third Wavew 
Computing. But they ask more money than the price I paid for it. Otherwise 
retailers know VERY LITTLE about the Rocket. In fact it seems they donUt give 
a hood about it.

*Radius support*: I am proud to have contributed to make it a little better. 
I must have spent at least 90 min of cumulated long distance phone time with 
either their sales representatives in TX and CA or their tech support in CA. 
Sales people are nice and apologetic when they donUt know the answer to a not-
so-tech question, like details of the product specs for instance. Tech people 
(that's where it gets irksome) are not so nice and apologetic when THEY don't 
know either. They always find out though and get back to you in time. 
By the way tech-support does not have a toll free number at Radius.That is a
serious drawback since retailer knowledge is so abysmal. Feel free to complain 
loudly about that. I did for my part.

*Tech tips about the Rocket* or *almost-all-you-will-not-find-in-their-
litterature-and-they-will-not-tell-you-before-you-receive-the-Rocket-in-the-
mail * :

1) The Radius Rocket can be returned during the first 30 days after you 
received it. This holds until Radius changes its policy, NO MATTER what the 
retailer tells you. Of course the retailer may assess a restocking fee. That 
is perfectly legal. But the fact is most of them say they will not offer a 30 
day MBG. Well they ought to since Radius offers it to THEM. Go shop somewhere 
else if necessary.

2) if you plan to put the Rocket in your Mac II :
     -  Make sure you get revision 1.3  of the Radius software. 
     -  Make sure you leave 2 Mb of RAM on your Mac II mother board. It is 
     indispensable for booting your Mac before the Rocket takes over and 
     actually reboots it ith its own memory. After rebooting the amount of 
     that memory the Rocket actually uses is puny and devoted to I/O only. 
     But it's got to be there.
     -  Make sure you have rev B of the Mac II ROM. If not Apple Inc offers a 
     free upgrade path for your mac II (yes ! free from Apple !!) in the form 
     of an entire logic board swap. Go to your nearest Apple dealer. They are 
     to do it free for you. I did it. You can do it !

3) The Rocket needs at least 4 Mb of RAM. Preferably 80 ns but that is not an 
absolute requirement. It works fastest with all four of it's DRAM slots filled 
with memory of the same size and speed but will work too if this is not the 
case. 

4) It will not take 16 Mb SIMMS because (itUs unbeleivable but true) they take 
too much room. Feel free to complain about that. It will take any 4 Mb SIMMS 
though, the special type for the Mac II and IIx (i.e. the one with the ninth 
PAL chip) and the regular (eight chip) ones. Buy the latter ones they are 
cheaper. That is one thing that only the Product support *manager* at Radius 
knew about. The rest of the tech rep did not.... One of them even tried to 
play dumb. It took him 35 min of conversation for him to admit he did not 
know. We finally got that last point right.

5) The rocket actually can make your Mac II, IIx, IIcx 32 bit clean. that is 
if you choose to do so. It comes with Mode 32 (Radius +Connectix=license 
agreement) and you also need the memory Cdev by Apple to be set on 32 bit. 

6) The Rocket will cause very few trouble otherwise. It does have some 
printing problems on a HP Deskwriter but to Radius credit it might simply be 
because I have a pre-release version of their software. It is Syst 7 comp. 
It is not compatible with the excellent Mac AppleZoom but will of course work 
nicely with Radius monitors. If somebody knows how to fix MAZ for it to work
with the Rocket I woul be more than interested in learning. In fact it 
provides significant g24x video acceleration. Call Radius about it. It is not 
compatible with Dovefax and many other fax/modem packages. I beleive the 
problem is soft. So the solution for your particular compatibility problem 
is probably on the way. 

7) It will eat up about 600Kbytes of DRAM just like that at booting time. 
You will not be able to access that full 8Mb of memory you saved up for years 
to buy later on. It needs the memory in order to upload the content of the Mac 
II mother board ROMs and keep them in memory. This I believe has at least two 
purposes : i) to make access to low level (ROM) calls faster, ii) to be able 
to actually substitute faster software routines for the hard coded ones in the 
ROMS. Anyway, just live with it, it works. However if you like to run Syst 7 + 
Mathematica 2.0.3 + Kermit in the background all the time like I do, 7.4Mb 
will not be enough. You will need to spend another $500 on four 4Mb SIMMS to 
get a total of  ??? ... ..... .... .... 19.4Mb!! Those of you who did not get 
that answer right, read this paragraph all over again ! (just joking).

The radius Rocket is a good product. I recommend it to those of you who cannot 
afford a Quadra. It does take too much power but I personnaly live with that 
quite well. That's all.

                                  Cedric Bhihe 
                                  bear@voodoo.ucsb.edu
                                  Materials Dpt
                                  UCSB, Santa Barbara, CA

From: jbthoo@ucdavis.edu ( John Thoo )
Date: Sun, 10 Nov 91 23:47:12 PST 
Subject: Full-page monitors for SE/30 


Sometime near the end of October I asked info-mac digest readers the following:
 
>I'm interested in purchasing a 15" portrait display for my SE/30, and
>have narrowed my choices down to the following three monitors (although
>I'm open to any further recommendations):
>
>Ehman Monochrome 15" Monitor (w/card): $495 direct
>Mirror Full-page Monochrome Display (w/card): $477 direct
>Sigma Designs PageView Multi-Mode (w/card): $683 campus bookstore
>
> Also, I'm presently using After Dark; will AD work *independently*
> on the SE/30's built-in screen and the PD, or will I have to obtain another
> screen saver?
 
 
First, I would like to thank each and everyone who responded to my requests
Most people seemed to like Mirror's PD very much, although one respondent
warned (in no uncertain terms) against buying Mirror; their responses follow.
 
 
=====*****BEGIN COMMENTS re full-page monitors*****============================
 
I love my Apple Portrait Display and hate the 13" RGB monitor.
All my work is with text and best handled with the PD.  Recommended.
 
But dual monitors are a pain.  Software incompatibilities,
loss of cursor control, etc.  If I had to do it over again (and money
were no object :-), I'd get a 16 or 19" E-Machines monitor.  Mono-
chrome would please me just fine, but the rest of the family would
probably have to have color, I suppose.  Color doesn't phase me.
===============================================================================
I`ve been using a Mirror FPD with my SE/30 for about a year and
a half now and haven't had any major problems with it.  I had
one little problem getting it set up, but Mirror has great
tech support, and they got me up and running quickly.  I give
Mirror my unqualified recommendation.
===============================================================================
I bought recently the Mirror 19" monochrome.  I`m very happy with it, great
company.  I also bought the Mirror 88 mb removable hard disk and CD-ROM
drive.  Also very happy with the quality of the hardware, software,
and people I deal with.
===============================================================================
John, we purchased 3 of the Ehman monitors for the secretaries, and
we have heard no complaints.  If there are any problems, one is getting
used to the curved screen.  Before we ordered we asked Ehman about that.
They replied we had 30 days to return the monitors if we didn't like
them. However, none of our ladies complained.
 
A bit of warning, Ehman is having trouble matching production to orders.
We originally ordered one monitor and got it right away. The other two
took considerably longer.
===============================================================================
The Sigma products are very good. I think you'll find that you
do get more for the extra money you pay (ie. better quality,
sharper image, lower EM emmissions, etc.)
 
WE have a PageView GS on a IIsi and two page display on a '386.
Both work very well and their users are happy with them.
 
The multi-mode sounds very appealling because it is not always
desirable to work at 80dpi.
===============================================================================
I had a Mirror full-page-display on my SE.  I like it (and Mirror) very
much.  The only thing I didn't like was the cost of upgrading the display
card so I could use it on my IIx (replaced the SE).... quite high.
===============================================================================
I'm responding to your request for info on full page monitors.  I recently
purchased a Mirror 19" 2 page monitor for my dad, since the price was good and
I'd heard good things about Mirror.  When my dad receeived the monitor, he
installedthe card, and failed to remove the old card; because of this, the
monitor didn't work.  My dad isn't a guru, so he didn't know much when he
called.  They sent him a new card, whic did the same, and it was only by
accident that he finally got it tow work.  My point is, that their tech
support didn't help with that and was barking up the wrong tree.
 
Anyway, the monitor worked for two weeks or so until I <g> visited and it
died.  Here is the
annoying part.  Mirror tech insisted that the monitor be shipped out before
they would replace it, so my dad was looking at some two weeks minimum down
time.  He is a printer and NEEDS the machine for his business, and this was
very uncool.  I'm not sure that any other mail order place is better, and of
course, at least they said they'd replace it, with no problems, but if you
can't live without the monitor, (and my dad has only one monitor, so his mac is
sitting useless on the desk) you might consider the extra $200 for a store
purchase and some peace of mind.
 
In short, I'd rate Mirror's service as adequate, but this trouble was not worth
$200.
===============================================================================
Mirror has a new display out that meets Swedish ELF VLF standards and is
supposed to be much brighter than their current monitor (MacWorld criticized
their current monitor for dimness).  It also has other little enhancements like
ADB ports and a flatter screen.  The SE/30 models are
due out in a couple of weeks.  The cost with SE/30 card is $577.  I will almost
certainly buy one of these myself.  I have had 2 Mirror hard drives and have
been satisfied with their service.  I have read in MacWeek that Ehman is
having financial troubles.  This may not be a good time to buy a product from
them.  I have seen the Sigma Designs monitor with card advertised for $645
mail order.  The thing is with the Mirror monitor you can always go to Mirror
if you have a problem.  With most mail order places you would have to send it
back to a manufacturer.  That could be a big hassle.  My understanding is that
a flat screen is better because it reflects less glare.
===============================================================================
DO NOT BUY THE MIRROR!!!!!
 
I bought one and it was the worst piece of junk I've seen in a long time.
I sent it back the next day.
 
=====*****END COMMENTS re full-page monitors*****==============================
 
 
=====*****BEGIN COMMENTS re using AD on mulitple monitors*****================
 
I have two monitors as well, and some After Dark modules work, others
don't. Basically, it seems that the programmer had to realize that
multiple monitors were a possibility and include support. Most of
the good modules either do something on the second screen or just
black it out (not unreasonable since my second screen is the SE/30's
internal monochrome. Some of the PD/shareware screen savers ignore
the second screen, so I don't use them, or I use them with Randomizer
on a five minute time length so I don't have to worry about my screen
sitting all night without a screen saver on.
=============================================================================== 
In order to use some of the AD modules with multiple monitors (either
because the programmer didn't take multi-monitors into account or because
I want different settings on different screens) I just make copies of
the modules.  Like Can of Worms1, Can of worms2 etc.  Then I use
Multimodule to place them on the screens of my choice.
 
=====*****END COMMENTS re using AD on mulitple monitors*****===================

Again, thanks to all who responded to my enquiry.
--John.

Date: Wed, 17 Feb 93 17:04:46 PST
From: macmod@SUMEX-AIM.Stanford.EDU (Info-Mac Moderator)

ec.photo,rec.video,comp.sys.atari.st,comp.sys.ibm.pc.misc,comp.s        ys.mac,comp.sys.mac.digest 
Path: mfolivo 
From: mfolivo@sactoh0.sac.ca.us (Mark Newton-John) 
Subject: Definitive Photo CD (specs, file formats, etc) 
Message-Id: <1993Feb17.100606.5305@sactoh0.sac.ca.us> 
Keywords: Magazine_article
Organization: Sacramento Public Access Unix 
Date: Wed, 17 Feb 93 10:06:06 GMT 
To: pacbell!ames!comp-sys-mac-digest@ames.arc.nasa.gov
Resent-To: backmod
Resent-Date: Wed, 17 Feb 1993 17:04:45 PST
Resent-From: Info-Mac Moderator <macmod@sumex-aim.Stanford.EDU>


Here is a informative article about the specifications of Photo CD.
PLEASE, followups to the appropriate newsgroups! Atari Falcon/030
applications mean little to IBM PS/2, and vice versa. This article
is of general interest.

This article is from Dealerscope Merchadising Magazine, a trade
publication for electronics retailers.



Photo CD: New Business Opportunities for Graphics and Photo 
Professionals

While ultimately aimed at consumers, Kodaks new technology initially 
is attracting graphics professionals. Software announced in August 
will let DOS/Windows and Mac users read and save Photo CD image, 
adjust colors and enhance pictures.

Features added to Kodaks's Photo CD system will allow sound, text. 
and graphics to be recorded along with photo-quality images onto 
Photo CD discs. THe discs, which will be housed in attractive "jewel 
boxe" case displaying the recorded images, will play back on TV, 
using dedicated Photo CD players.

For nearly two decades, Peter Mackey has been creating audiovisual 
presentations and video productions for busines and industry.

As vice president-media integration at Imergy, and interactive 
multimedia production and graphics firm in Norwalk, CT, Mackey is a 
beta site for the much heralded Photo CD technology on the way from 
Eastman Kodak Co. Simply stated, Photo CD puts 35mm film photos onto 
compact disc.

In August, Kodak announced software that lets DOS/Windows and 
Macintosh users import and enhance Photo CD images, plus a host of 
new formats and functions aimed directly at graphics and photography 
professionals.
	Beta Tester Mackey is using Photo CD to produce narrated 
essays, captioned photo albums, and other projects that he is more 
secretive about. These have given him an early insight into the value 
of Photo CD.
	"If designers and artists can personally experience what 
these products can do," said Mackey, "I have no doubt that they will 
be sold on Photo CD."

Opens busines doors
For the computer graphics community, Photo CD promises to bring forth 
not only a robust, innovative medium, but also new business 
opportunities. Kodak itself is betting a large part of its future on 
Photo CD- essentially a hybrid electronic imaging/silver halide film-based technology intended to keep alive and hopefully grow users' 
ingrained habit of recording events and locations on film.
	Kodak is pumping about $30 million dollars into an ad 
campaign to promote Photo CD products, banking that the technology 
holds out the potential to be a "VCR"-line blockbuster product.
	While Kodak's ultimate focus is on the vast consumer 
marketplace where billions of dollars in film sales are at stake, 
Kodak is also very much aware that its battle also entails engaging 
the hearts and minds of the professional, industrial, and commercial 
computer graphics communities.
	For it is the visually creative practitioners who are likely 
to be the inital benficiaries and trend setters in applying Phot CD 
in myriad, unforseen ways.

Photo Database
For computer picture professionals, Photo CD's greatest potential is 
as an input source for digital images used in computer-based 
presentations and computer graphics of all kinds. "We can use Photo 
CD as a photo capture and archiving system and also as a delivery 
platform," Mackey said.
	While technolgy to scan film and hard copy directly to 
computer-readable media has been around for some time, existing 
systems work too slowly and cost too much for even high-volume shops. 
Photo CD overcomes this price/performance drawback.
	The film scanner component if the Sun Microsystems-based 
Photo CD Imaging Workstation (PIW) digitizes a full-color 35mm frame 
into a very high resolution image- 2048x3072- in just six seconds. To 
achieve this level of resolution, competing scanners typically take 
several minutes.
	Not surprisingly then, such fast performance also yields more 
palatble costs. Kodak estimates that a typical user will pay $20 to 
transfer a 24-frame roll of 35mm film onto a compact disc in Kodak's 
proprietary Photo CD format.

Bought Image Bank
Likewise, Photo CD will intrude in traditional photo sources. Wanting 
to encourage demand for images in Photo CD format, Kodak last year 
bought the Image Bank, one of the largest film stock houses in the 
world. Using the Kodak PIW, Image Bank will be able to transfer its 
hundreds of thousands of 35mm negatives held in inventory to Phot CD 
files rapidly and inexpensively.
	On August 25, Kodk announced plans for a Kodak Picture 
Exchange to go online next year using the public telephone network, 
much like text and data networks such as CompuServe. The Kodak 
Picture Exchange will link stock photo houses, graphic designers, 
pubishers, and oher distributors of images, and end users.
	Looking ahead, film will not long remain Photo CD's only 
image source. Kodak recently engaged Polaroid to manufature a Photo 
CD scanner to handle instant photos and existing prints whose 
negatives are lost.
	Kodak will market the scanner as an accssory under its own 
brand name to be sold along with the PIW to photo finishing labs and 
others having the output volume neccessary to warrant purchase of the 
$100,000-plus PIW system. Scanning capability is also being expanded 
to cover a variety of positive and negative film formats beyond 35mm- 
including 70mm, 120, and 4x5-inch.

Four Basic Subsystems
The turnkey PIW system consists of four basic subsystems: The film 
scanner, which digitizes negatives or slides, scanning film at a 
maximum resolution of 2048 lines by 3072 pixels by 12 bits in each of 
the primary colors; the Data Manager, which encodes the image data, 
automatically performing color and density adjustments; the Writer, 
which writes the digitized information to a Photo CD disc; and the 
Printer, which produces what Kodak refers to as a "near-photographic-quality" prints along with the thumbnail prints that serve as a 
picture index on the Photo CD storage case.
	The device also spews out standard-size prints and 
enlargements up to 10 inches square.
	There's even more functionality coming. Starting in 1993, 
photo finishers will be equipped to record tet, graphics, and sound 
on Photo CD discs; they will also be able to encode attribute data 
and other information on the discs that enable non-linear sequencing 
of the images to be programmed for playback.
	Photo CD playback takes place not just on one's computer 
display- where images can be manipulated- bit on an ordinary 
television set. This is key to Kodak's making Photo CD a burgeoning 
consumer electronics product.
	Kodak's approach entails use of a specialized Photo CD player 
that Kodak recently began shipping; and in a a stroke of consumer 
merchandising foresight, the unit also plays back audio on ordinary 
compact discs.
	In all, Kodak offers a selection of four Photo CD player 
models. A basic unit carries a $449 list price. But the top-of-the-line model offers some stunning capabilities. With it, an operator 
can change the viewing sequence at will, zoom in or out of an image 
using crop marks to focus in on any area of the image, and view the 
images under manual control or by automatic timing.
	This high-end player also incorporated a five-disc carousel 
along with capabilites to handle composite video, S-video, and audio 
output. Its price: $549.
	Kodak is even working on the ultimate jukebox player for the 
image junkie. It has exhibited a prototype player holding 
approximately 100 discs- or a nominal capacity of 10,000 images. The 
device selecs a disc, transports it to a built-in reader, and begins 
reding the disc- all in four seconds.
	For those who want to manipulate images and ultimately 
incorporate Photo CD images into a properly-sequenced, client 
presentation, Kodak launched at last month's MacWorld its Photo CD 
Access software.
	Available now for $40, it enables any user of PC Windows or 
Macinosh to access any image on a Photo CD disc; select and display a 
desired image or sequence of images; export the selected photo to a 
file in such formats as EPS, TIFF, RIFF, PCX, and PICT; crop and 
otherwise edit an image and paste it into any image processing, 
desktop publishing, and other Photo CD compatible application.
	In addition, Kodak offers PhotoEdge, a $139 program that lets 
Mac and Windows users zoom, crop, rotate, and flip Photo CD images; 
and adjust color, cotrast, and focus. For storage and retreival, 
Kodak will sell later this year its $399 Kodak Shoebox software for 
Windows and Mac users. The Shoebox also works with Kodak Picture 
Exchange.
	Photo CD Access software, however, is a entry-level, interim 
package that will become redundant once traditional software packages 
become Photo CD enabled. Towards that end, Kodak also sells a Photo 
CD Access Developer's Toolkit, priced at $695, intended to encourage 
application devleopers and other third parties to incorporate Photo 
CD compatibility into their products.

Apple, Kodak Team
Apple announced Aug. 25 it will work with Kodak to incorporate Photo 
CD access into curent and future Macintoh operating systems. Apple is 
also building Photo CD compatability into its QuickTime multimedia 
software; Micrografx Inc. has done the same with regard to its 
Picture Publisher software; EFI for its Cachet color managemnt 
software; Corel Corp. for CorelDraw; and Media Cybernetics for the 
Halo Desktop Imager image processing package.
	With Photo CD compatibility, a professional graphics creator 
will be able to import Photo CD images into an existing system, edit 
and combine them with other graphics, text, video, and audio 
elements, blending all of the disparate data types into a state-of-the-art presentation.
	The Toolkit actually consists of a library of C language 
functions that (1) read images from Photo CD discs into memory, (2) 
decompress high-resolution images, and (3) provide basic image 
manipulation capability. The Toolkit cannot be used to compress 
images and write them directly to a disc; that is a task for the PIW 
system- a strategy adopted by Kodak to assure high-quality image 
recording on film.
	In fact, Photo CD is a practicable technology because it 
utilizes image compression and decompression effectively. Just how 
Kodak handles this proprietary aspect of Photo CD turns out to be 
both surpising and ingenious.
	A Photo CD image is actually sored five times at five 
different resolutions on the same disc; this bundle of digitized 
pictures is called an ImagePac.
	At the high end- denoted by 2048x3072 as well as 1024x1536 
resolutions- images are stored in compressed form to reduce storage 
requirements; the lesser resolution images- 512x768, 256x384. and 
128x192- are stored in noncompressed form.
	The different resolutions are used as follows: 128x192 for 
thumbnail index images printed on each disc jacket and used for image 
retrieval; 256x384 for previewing images on a computer screen; 
512x768 for standard NTSC imagery; 1025x1536 for High Definition TV 
(HDTV) signals; and 2048x3072 for output to high-quality print.

Fills Up to 6Mb
Each Photo CD ImagePac occupies a total of three to six Mbytes, 
depending on the actual high-resolution image compression achieved. 
With present technology, it takes about an hour to fill a disc with 
100 ImagePacs on a disc.
	What is of concern to end users is the type of CD-ROM drives 
neccessary to access Photo CD images. It requires an XA copact disc 
drive that supports so-called Mode 2 multisession operation, meaning 
that one 24-film roll can be recorded in one PIW session, and then at 
a later time returned to the photo finisher with another roll of film 
for recording on the same disc to add more image frames.
	The Photo CD approach contrasts with traditional CD-ROM 
drives where an entire disc is recorded in a single session. In both 
cases, once recorded, the images in a given sector an be read 
repeatedly, but they cannot be erased nor can they be recorded over.
	Such multisession drives wll be made by Philips, which along 
with Kodak co-developed Photo CD. Likewise, Sony, Pioneer, and 
Toshiba all plan to enter the market Photo CD compatible multi-session CD-ROM XA drives; the four manufacturers collectively account 
for 85 percent of the current market for CD-ROM dirves.
	Aside from the question of its ultimate acceptance, Photo CD 
raises another issue of concern to computer graphics professionals: 
the viablilty of the compression step that causes the higher 
resolution images to lose a bit of clarity, an essential tradeoff in 
exchange for efficient data storage. Presenations creator Mackey 
insists that he can see no deterioration in image quality when 
eyeballing his Photo CD works. However, neither he, nor anyone else, 
has worked with the tchnology to create, for example. slick magazine 
covers and pages. In such applications, even Kodak offocials have 
conceded tha Photo CD images will not be adaquate because of 
resolution loss.
	What about the use of Photo CD for high quality poster-size 
reproductions? One tell-tale experience is forthcoming from Alexandra 
Asmanis, creative director at Asmanis Design &  Associates in 
Somerville, MA. Her design firm has begun an experiment to create 
20x20-inch posters using Photo CD as an image source.
	Image security is yet another concern to some professional 
designers, artists, and photographers. No encryption technology is 
encorporated into the basic Photo CD to help image originators 
protect their creations.
	However, a Kodak Pro Photo CD Master disc, designed for 
professional photogtaphers and due to be available in the spring of 
1993, offers three security features: a special identifier to 
indicate image ownership and copyright, the ability to place a 
watermark (such as "PROOF") over an image, and the ability to encrypt 
high resolution images. The Pro Photo CD Master disk, which otherwise 
looks like its consumer cousin, also will store images from larger 
film formats favored by pros- including 120 and 70mm, and 4x5-in., as 
well as 35mm.
	A long term threat to Photo CD is electronic cameras. True, 
current filmless imaging cameras already on the market are bedeviled 
by either high prices or unacceptably low resolutions. But in five to 
ten years, when solid state memories and higher capacity sensors 
become available, electrnic film cameras could give Photo CD a run 
for its money.
	Kodak competitors have been slow to respond to the Photo CD 
challenge, content to sit on the sidelines and let Kodak take the 
lead- and the risks.
	A few are even "supporting" Photo CD, including film 
producers Fuji and Agfa-Gevaert that will offer PIW equipment to 
photo finishers overseas for converting their own proprietary film 
into Photo CD format.
	At least for starters, Kodak seems to have the Phoo CD field 
largely all to itself, with the computer graphics professionals 
having the opportunity to call many of the shots- at least, 
initially.

(Stanley Klein and Malcolm Stiefel have co-authored articlces for 
many years, for Computer Pictures and other publications. Klein is 
publisher/editor of the S. Klein Newsletter on Computer Graphics. 
Stiefel is a computer scientist at Mitre Corp.)

-- 
mfolivo@sactoh0.SAC.CA.US   SAC-UNIX (916) 649-0161
The Good Guys!		We know our stuff
Audi			The Alternate Route
Atari			Power without the Price

Date: Mon, 15 Mar 93 12:22:03 GMT 
From: knight@swfmc1.SINet.SLB.COM (Francis Knight, SIEM UK Felixstowe)
Subject: Hard Drive Stiction problems: a follow-up 

sasg0244@uxa.cso.uiuc.edu (Steven Arthur Sivier) writes in response to my 
query last week:

>You mean its Sony drives that have the stiction problems? I thought it
>only affected Quantum drives. It happens I have an old 40 Meg Sony drive
>(Model SRD2040A-02) from out of a IIcx that refuses to spin anymore. Can
>I get this repaired (or replaced) for free or should I just toss it?

I sure do. I went through this same loop last summer with my own SE/30 with
a Sony drive. I had to do some research on behalf of my qualified Apple
dealer, natch, but got a free replacement. Now he sounds most
knowledgeable, as I discovered when I phoned him last week in relation to
the firm's machine, until I got to the word "Quantum", whereapon: problem
not known. I thought the Quantum problem was more widely known, but
strangely, nobody has (yet) confirmed it in response to my query last week.

You have until August 15 of this year to swap drives from the affected 
batches!

Appended is the 8/91 Apple Service Notice, previously filed as 
report/old-quantum-drive-fix.txt. It more properly should be
report/old-sony-drive-fix.txt. 

Cheers,
Francis K.
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=

      SERVICE NOTICE: 20MB/40MB HARD DRIVE REPAIR EXTENSION PROGRAM

		   ( Copyright 1991, Apple Computer Inc.)
 
 
				 OVERVIEW
 
We have discovered that a certain batch of half-height internal 3.5" 20MB and
40MB hard drives and some external 3.5" 20MB and 40MB drives may have been
subjected to disk media contamination. These drives may experience a number of
different symptoms, as fully described later on in this notice. To address this
problem, Apple is offering a 20MB/40MB Hard Drive Repair Extension Program for
customers and Service Providers with drives manufactured four years ago or
later that meet all the criteria below. A new drive, P/N 661-1629, has been
substituted for the problem drives.
 

		     DRIVE IDENTIFICATION INFORMATION
 
		    * Definition of 20MB/40MB Symptoms
 
  * Stiction problems: Platter does not spin up after drive has been powered
    down for period of time.
  * Head crashes: Drive may or may not mount, and data may be corrupted.
  * Soft errors: Disk continually goes in and out of seek mode.
 
			* Model and Serial Number
 
The affected 20MB and 40MB drives were manufactured in Macintosh( SE, Macintosh
SE/30, Macintosh II, Macintosh IIx, Macintosh IIcx/IIci, and Macintosh IIfx
computers. The problem also affects some external 3.5" 20MB and 40MB
configurations. Additionally, these drives were used as Service repair modules
under P/N 661-0612 (20MB) and P/N 661-0464 (40MB). Because of the problem, all
new and existing orders for 20MB drives (P/N 661-0612) will automatically
receive a 40MB drive (P/N 661-1629).
 
If you have any questions regarding qualification of a failed 20MB or 40MB
drive, contact Technical Operations for further clarification.
 

		  * How To Identify Affected 40MB Drives

  1) Symptoms of affected drives (one or more of the following):
     * Stiction problems
     * Head crashes
     * Soft errors
  2) Serial number indicating the drive is less than four years old. See the
     chart below for qualifying dates and serial numbers.
  3) Model number: SRD2040

 
		  * How To Identify Affected 20MB Drives

  1) Symptoms of affected drives (one or more of the following):
     * Stiction problems
     * Head crashes
     * Soft errors
  2) Model number: SRD2020 (Note: All drives with this model number are
     eligible throughout the life of this program. Serial number matching is
     not required.)
 


		   RETURNING AND REPLACING HARD DRIVES
 
			    * Customer Repair

  The program covers free replacement of a customerUs qualified failed 20MB
  (P/N 661-0612) or 40MB (P/N 661-0464) hard drive until August 15, 1993. In
  return, the customer will receive a 40MB hard drive (P/N 661-1629).

 
		 Guidelines for Submitting Repair Claims
 
  Use the following guidelines for determining how to fill out the Warranty
  information area of an Apple Authorized Transaction Form when returning a
  20MB or 40MB drive for repair:
 
  * In-Warranty Repairs:
    Some 20MB and 40MB drives are still under Apple warranty. When returning
    these drives for repair, always claim RIn-WarrantyS on the transaction
    form.
 
  * Out-of-Warranty Repairs:
    - If the drive is Out-of-Warranty and displays the symptoms described
      above, claim this repair extension program on the transaction form.
    - If the drive is ROut-of WarrantyS and does not display the symptoms
      described above, claim ROut-Of WarrantyS on the transaction form. In
      addition, note that if the drive is a 20MB drive (P/N 661-0612), the
      customer will receive the replacement 40MB drive (P/N 661-1629) at the
      current 40MB price.
 
  When replacing one of the qualified hard drives, do the following:
 
  1) Replace the failed hard drive with the replacement module (P/N 661-1629).
     Refer to the Technical Procedures for complete installation instructions.
 
  2) Record the following information on an Apple Authorized Transaction Form
     to obtain Tier 2 reimbursement and Parts Credit for each failed hard drive
     exchanged:
 
     * Customer/company information
 
     * Date the system was received
 
     * The Apple product name the drive was bundled with
 
     * Repair Extension Authorization code 2DS406; (Reference this code
       in the Repair Extension Code area.)
 
     * The part number, description, and Repair Confirmation Code (RCC)
       for the hard drive.
 
  All valid claims must include this information. Refer to the Repairing
  section of the August Service Programs manual for more information on
  completing an Apple Authorized Transaction Form.
 
* Service Stock
  If you have a hard drive in your Service inventory with the serial number
  and/or model number identified above, return the drive to Apple through the
  Service Return Material Authorization (SRMA) process. Contact Apple Customer
  Service to receive the SRMA approval and number. Remember, the SRMA number
  must be written on the outside of each package.
 


		      OUT OF WARRANTY REIMBURSEMENT
 
Reimbursement is offered to customers who paid for Out-of-Warranty hard drive
repairs performed by Authorized Apple Service Providers prior to August 16,
1991. Apple requires that customers submit the following information by
February 29, 1992 to qualify for reimbursement:
 
   * Proof of purchase
   * An Apple Authorized Transaction Form that includes the following:
     - Name of the Service Provider performing the repair
     - Date of the repair
     - Parts used in the repair
     - Cost of the repair
   * Proof of the repair payment (cancelled check, credit card slip,
     or paid invoice)
 
  Customers should submit all of this information to:
 
      Apple Computer, Inc.
      Attn: 20MB/40MB Hard Drive Repair Extension Program
      P.O. Box 172243
      Denver, CO  80217
 
Please advise customers to allow 6 to 8 weeks for processing their returns.
If they have any questions concerning their claims, they should call
(303) 297-2321.
 


			   PROGRAM INFORMATION
 
Repair extension information for this program has been added to this monthUs
Product Notices section of the Service Programs manual. If you have any
questions regarding this program, contact your Customer Service Specialist at
(408) 559-6444.
 
 
Apple Support icon
Service & Support folder
Service Notices folder
This Month's Service Notices - Reseller folder
20MB/40MB HARD DRIVE REPAIR EXTENSION PROGRAM
8/15/91

				  ______

				IMPORTANT!
    CLARIFICATION TO THE 20MB/40MB HARD DRIVE REPAIR EXTENSION PROGRAM
 
		   Copyright 1991, Apple Computer, Inc.
 
 
After additional review of the 20MB/40MB Hard Drive Repair Extension Program
Service notice, there is a point that we need to clarify.
 

			      SERVICE NOTICE
 
In the "Drive Identification Information" section and later throughout the
notice, we state that drives affected by media contamination exhibit "soft
errors." However, soft errors usually cannot be detected by customers, since
in general soft errors are not detectable. But, customers will detect a head
crash, which can be a result of excessive soft errors.
 
As a result of this clarification, the 20MB/40MB Hard Drive Repair Extension
Program will only honor claims for the symptoms described below, which modify
or replace the symptoms in the Service notice:
 
1) Stiction problems, exhibited by the drive failing to spin up after being
   powered down for a period of time
2) Head crashes, exhibited by a loud, metallic scraping noise at spinup
 
If you have a customer with a failed drive that meets the serial number and
model number requirements, but does not meet the symptom requirements stated
above, please call your Technical Operations Representative.
 
There is also some confusion over the age of the drives covered by this Repair
Extension Program.  We state that "drives manufactured four years ago or later"
will be covered. To clarify, this means that drives that are no more than four
years old will be covered by this program. To determine the age of the drive,
please refer to the "Model and Serial Number" section in the Service notice to
find information on reading the date code.
 

			 SERVICE PROGRAMS MANUAL
 
Since the incorrect symptom information is also included in your printed
Service Programs manual update, please manually correct this information until
we send you updated pages. (The AppleLink versions of the August Service
Programs manual update contain the corrected information.)
 
To correct your manual:
 
* Cross out the last bullet under the RDrive Identification Information:
  Definition of 20MB/40MB SymptomsS section of the 20MB/40MB Hard Drive
  Repair Extension Program (page 8.7.1), which is a duplicate of the
  incorrect information in the Service notice. The information that needs
  to be removed begins with RSoft errors.S
 
* Make the same deletion and correction under RHow To Identify Affected 40MB
  DrivesS (page 8.7.1).
 
* Make the same deletion and correction under RHow To Identify Affected 20MB
  DrivesS (page 8.7.2).
 
Thank you for your cooperation in this matter. We apologize for any
inconvenience this may have caused you.
 
 
Apple Support icon
Service & Support folder
Service Notices folder
This Month's Service Notices - Reseller folder
CLARIFICATION TO THE 20MB/40MB HARD DRIVE REPAIR EXTENSION PROGRAM
8/15/91

Date: Fri, 21 Jan 1994 13:56:30 +0000
From: P.Kay@hertfordshire.ac.uk (Peter Kay)
Subject: StyleWriter: Grayscale vs Black&White (F)

In a previous post, I asked for advice concerning ink economy when printing
text with Grayscale or Black&White on a StyleWriter II, because I had been
somewhat confused by apparently contradictory advice in the SW manual and
ReadMe.

I had a good response, but some of the replies did show that I wasn't the
only one to be confused.

First of all, thanks to all of you who responded. (You know who you are.)
I now understand the mechanics of printing better than I did.

Some of you were interested in a summary, so I am including 2 of the
replies below, since these seem to resolve the question I raised:

                =======================================

>First, for the life of your cartridge, the best option is to put all text you
>print into a sufficiently dark gray, and then print with Grayscale on.  The
>reason is that the StyleWriter will print a full-out black (using more ink)
>if printing in black and white, than with a gray.
>
>The drawback here is that printing in gray could well be slower.  With that
>option turned on, there is more information to be sent to the printer about
>what level of gray is being used.  Depending on how smart Apple was, this
>extra information could cause anywhere from a trivial slowdown to a rather
>noticable one.  I'd just play with it if I were you.  But if you want to make
>you ink last, use grayscale and put your text into something dark, but not
>dead-black.

[Presumably, if one is printing in the background, the slowness of printing
with
Grayscale on is NOT a drawback.}

                ======================================

>Well: "in my experience" and "from my knowledge", both rather limited,
>1) quality: greyscale vs. b&w affects the quality of graphics, not text.  If
>you
>use b&w for greyscale or color graphics, you will get either solid black
>or solid white for each color.    greyscale will "halftone" things.
>2) speed: the SW II driver allegedly checks for each page whether it contains
>greyscale information or not.  If it doesn't, it behaves as if it were printed
>using B&W, which is faster--not sure if the printer really is faster, or if
>the driver requires less CPU power to generate the halftones.
>3) ink usage:  if you happen to print graphics in B&W you'll use ink faster
>if there are dark colors, since you'll get lots of solid black areas
>
>>From #2, I assume that in printing a page of only B&W stuff (text, graphics,
>whatever) the printer will behave the same with either B&W or greyscale
>selected.  And from that, that the ink consumption won't change.  However,
>if you do encounter a color graphic or colored text or whatever, your ink
>consumption should be lower in greyscale mode, since it will both to halftone.
>
>This may be all washed up, too.  I don't have a reference on #2, but I've
>tried #1 (and #3 follows from #1, I think).  It is definitely slower at
>printing greyscales, even in a Word 5.1 document with a few graphics
>created using of Word's builtin drawing package, in simple 8-color colors,
>than printing the same document in B&W.  Whether the check I mention is
>made, I don't know (I guess a multipage document with color/gs on only
>1 page would be the test for that).

                ========================================



Peter Kay, School of Information Sciences, (tel. no. 0707 284 358)
University of Hertfordshire, UK, AL10  9AB (P.Kay@herts.ac.uk)

Date: 3 Feb 1994 15:35:54 -0600
From: "Glockzin Donald" <Glockzin_Donald@macmail1.fwrdc.rtsg.mot.com>
Subject: Submission: SCSI_Case1.1.txt

This is a text file that describes how to build a case to hold multiple 
internal SCSI devices using a PC case. The cost is around $100 (US) and
can hold 4 or more devices. The text file gives possible part numbers and
hopefully answers possible questions from the average user. My system has
been working for >3 months without any problems. If interested, read it.
Flames accepted, but you should at least read it first. I am the author.

(This can be included in any non-commercial package.)

THANKS -- DG 
Donald Glockzin  
Lead Engineer   
Motorola - CIG
glockzin_donald@macmail1.ftw.rtsg.mot.com 
____________________ cut here ________________________________________ 
 SCSI CASE 1.1

Using PC Case to hold SCSI Devices for a Mac system.

INTRO:
The price difference between internal and external SCSI devices is about $50 to
$100. The cost to build a case to handle numerous internal SCSI devices can be
under $100. This will reduce the cost to add other devices. This report should
explain the cost, the material, and the work required to complete this task.

CONCEPT:
External SCSI devices come with a case, a small power supply, a loop-thru SCSI
connection, and maybe some type of termination. The PC case will provide the
mounting and the power supply for multiple SCSI devices. One ribbon cable
assembly is required to connect the devices together and to the rear of the
case. A shielded SCSI cable can be purchased to connect the Mac to the PC case.
The last device on the chain in the PC case will need to terminated. If other
SCSI devices that will not be in the PC case are used, they will need to be
located between the Mac and the PC case on the SCSI chain.

MATERIAL:
1)  PC Case - a mini-tower case with a 250W or more power supply can be
purchased for <$60 ($45 is a good price new). It should come with miscellaneous
hardware for mounting the devices. The power supply should be prewired with
connectors for providing power to numerous SCSI devices (typically 4 or more). 
2)  External SCSI Cable - a DB-25 to 50 pin centronics for about $15
3)  50 Pin Ribbon Cable - 5 feet or less. The quality is up to the buyer and
starts around $1/foot. (Digi-Key  R028-5-ND is $4.79 for 5 feet)
4)  50 Pin Centronics Connector - the external connector on the PC case at one
end of the ribbon cable. (CHAMP Latch Bail Lock - Amp # 553603-1; Digi-Key
A1569-ND $5.20)
5)  [Optional] Bail Lock Hardware - the hardware to lock the centronics
connectors together; other methods like screws can be used. (Amp # 552561-3;
Digi-Key A1517-ND $1.67)
6)  50 Pin Socket Conn with Polarizing Key - the connector that snaps onto the
ribbon cable where needed. If you have five devices, you need five connectors.
(Amp # 1-746286-0; Digi-Key AKC50T-ND $3.57)
7)  [Optional] Strain Relief for part #6 - at least one should be used for the
end of the cable, but the rest aren't needed if care is used. (Amp # 499252-4;
Digi-Key ASSR50-ND $0.77)
NOTE: Please verify these part numbers before ordering to make sure that the
proper part is ordered. Many different equivalent parts from other makers can
be used. Better quality (i.e. gold contacts) can be used to, but it increases
the cost.

COST:  (all cost are continental US dollars)
$ 60       PC Case 
$ 15       SCSI Cable 
$  4.79    Ribbon Cable 
$  5.20    Centronics Conn 
$  1.67    Bail Lock 
$ 17.85    Five Socket Conn 
$  0.77    One Strain Relief 
------- 
$105.28    Total (but your cost may vary)

SCSI CABLING: This is one area that usually worries most people out of the fear
of destroying their device. Buy an official Mac SCSI cable that is a 25 pin D
to 50 pin centronics. The rest of the way, just match up all of the pin 1's.
The other pin numbers will not match up due to the numbering convention. The
ribbon cable should be marked to show pin 1. Closely examine the 50 pin
connectors and look for the pin 1 marking (they all have them). Always keep pin
1's matched up and it will be correct. The connectors must be keyed to prevent
plugging them into the drive wrong. The ribbon connectors should only be
snapped on once so be careful. Reusing ribbon connectors usually results in a
less reliable connection and might cause opens or shorts. For putting the
connectors on the ribbon, try using a vise whose head is the length of the
connector. Uniform pressure along the connector helps make a good connection.
Also, make sure that the connectors are straight when putting them on the
ribbon to prevent misalignment. Before hand, figure out where you plan to mount
the drives and how the ribon will be routed. Be sure and consider future
additions as you will use the same cable. All of the connectors don't have to
be put on the ribbon at the beginning. Leave some space and when the new drives
are added, put the connectors on then. This probably would require removing the
whole cable assembly to add the additional connectors. Be conservative in the
amount of ribbon cable used. Leave enough for additions, but too much can hurt
the SCSI bus. No more than 5 feet should be required. The maximum specified
limit length of the whole SCSI chain is 20 feet, but reality says that 15 feet
is a more pratical upper limit. Use the SCSI reference table below if you
desire to double check the connections.

SCSI CABLE PINOUT: 
Centronics    Ribbon      DB-25    Signal     Signal   
  50 Pin      50 Pin      25 Pin    Name    Description 
----------    ------      ------   ------   ----------- 
  1,2,3       1,3,5        14       GND      Ground 
  4,5,6       7,9,11       16       GND      Ground 
 7,8,9,11   13,15,17,21    18       GND      Ground 
   10           19         nc       GND      Ground 
   12           23         nc       GND      Ground 
   13           25         nc        -       Open
   14           27         nc       GND      Ground 
   15           29         nc       GND      Ground 
16,18,19     31,35,37       7       GND      Ground 
   17           33         nc       GND      Ground 
20,21,22     39,41,43       9       GND      Ground 
23,24,25     45,47,49      24       GND      Ground 
   26            2          8       DB0      Data bit 0 
   27            4         21       DB1      Data bit 1 
   28            6         22       DB2      Data bit 2 
   29            8         10       DB3      Data bit 3 
   30           10         23       DB4      Data bit 4 
   31           12         11       DB5      Data bit 5 
   32           14         12       DB6      Data bit 6 
   33           16         13       DB7      Data bit 7 
   34           18         20       DBP      Data parity 
   35           20         nc       GND      Ground 
   36           22         nc       GND      Ground 
   37           24         nc       GND      Ground 
   38           26         25       TPWR     Term Power 
   39           28         nc       GND      Ground 
   40           30         nc       GND      Ground 
   41           32         17       ATN      Attention 
   42           34         nc       GND      Ground 
   43           36          6       BSY      Busy 
   44           38          5       ACK      Acknowledge 
   45           40          4       RST      Bus Reset 
   46           42          2       MSG      Message 
   47           44         19       SEL      Select 
   48           46         15       C/D      Common/Data 
   49           48          1       REQ      Request 
   50           50          3       I/O      Input/Output 
Note: The ground pinout may be different than the sample cable used to create
this table.

OTHER CABLING:
The power connectors on the power supply should be the standardized 4 pin keyed
connector and plug right into the SCSI devices. There will be some other power
connectors that can be ignored as long as they don't short out somewhere. Note
that some power supplies have open circuit cutback. A load on the 5 volt and
maybe the 12 volt line might be required to get the voltage outputs up to the
rated levels. This load may also be needed in the completed case if the
installed SCSI devices don't draw enough current. A 10 ohm >2.5 watt resistor
(P=(5^2)/10=2.5W) on the 5 volt line should provide enough loading. Most PC
cases have a few LEDs with two pin connectors to indicate power, turbo, and
reset. These can be connected to the 2 pin headers (usually found opposite the
50 pin connectors) on the harddrives to indicate disk access. The correct
polarity is required to get the LED to work, but the wrong polarity should not
damage anything. So just trying any polarity to see if works should be
acceptable. Most new PC cases won't even have the power switch pre-wired to the
power supply. The provided instructions should be used to complete this job.
Extreme care should be used when dealing with AC power lines.

MOUNTING:
The PC case should have plenty of mounting screws and brackets for supporting 4
to 5 SCSI devices. Be sure that the mounting doesn't distort the SCSI device's
case which could cause damage. Also make sure no loose cables or other objects
are allowed to cause a short on the device. Most harddrives will function just
fine no matter what the orientation. The key is to format the drives in exactly
in the same mounting used for regular drive operation. Remember that the last
SCSI device needs to be terminated. The mounting for the external centronics
connector is probably the hardest part of the whole deal. The connector doesn't
easily fit anywhere. A custom cutout in the back of the PC case is the cleanest
approach, but sticking it through one of the card slots is the easiest. Don't
let the ribbon cable stick through the case because the metal wall could wear
through the cables insulation cause a short.

SCSI IDS:
The Mac SCSI allows 8 IDs. The ID 0 should be used by the internal drive and 7
should be the Mac. That leaves 6 others (1-6) that can be used for other SCSI
devices. The 6 pin (2 rows of 3 pins) header on the devices is used to set the
ID and is a three bit binary number. Only one device can be used for each ID or
the bus will not funciont and might cause loss data. Note that if more than one
device arbitrates for use of the bus at the same time, the device with the
higher ID gains control first. Once a device, regardless of ID, gains control
of the bus, no other device can interrupt that session.

TERMINATION:
The first and last device (by physical cable location, not by ID) in the SCSI
chain must be terminated. The internal harddrive should be internally
terminated. A row of 24 pin sockets is typically located on most harddrives
near the 50 pin connector. These sockets hold the line termination resistor
arrays used for SCSI termination. If the resistors are in, the device is
considered internally terminated. If not, then it is unterminated. Some reports
state that some exceptions exist to the termination rule. If the SCSI chain is
<18 inches, then terminate one end. If the chain is >10 feet, then a terminator
in the middle should be added. Always terminate just both ends first and only
change if problems exist. Three 8 pin 220/330 ohm line termination resistor
arrays are typically used to provide the termination. The faster the mac is and
the more devices there are attached to it, the more important termination is.
[Some info from Mac Bible]

SCSI DEVICE ORDER:
While the SCSI bus should be a plug-n-play interface, some problems have been
noticed in different configurations. Some devices will not function properly
with other devices. The physical order on the SCSI chain sometimes causes
problems with some devices. This SCSI PC case should change any of these
conditions. If the devices functions properly in a standard setup using
individual cases and cables, then it should work in the PC SCSI case.

SHIELDING:
The shielding of the case and the ribbon cable is a concern that many people
have. External devices have metal or conductive walls and have real short
ribbon cables. The PC case should provide the necessary shielding required for
the outside world. The major question is the shielding requirement from device
to device and from cable to device. For most systems (almost all home systems),
this PC case system will provide plenty of shielding and the SCSI communication
will function properly. The PC case system may cause SCSI re-tries and other
problems with the SCSI bus if not properly implemented. The use of a SCSI test
program can be used to conduct timing tests to see if the PC case system is not
performing properly.

POSSIBLE QUESTIONS/PROBLEMS/WORRIES:
1.  Heat Dissipation - If you think (or notice) the case will get too hot then
add a fan. The speaker mounting might be a good place to mount a fan. Consider
the air flow as some devices should not suck in outside air due to dust. A DC
fan could easily be powered by the internal power supply. The PC power supply
should be able to handle the 4 or 5 devices without a problem. Check the power
consumption of each device to be sure.
2.  SCSI Loop Thru - You can make this system with a loop thru by adding an
external connector at the end of the ribbon cable. This greatly increases the
length of the cable and slightly increases the cost and work, but it is
definitely doable. This may be required if you have another device that must be
at the end of the SCSI chain.
3.  On/Off Power - All of the devices mounted in the PC case will get powered
on when you power up the supply which is a feature of this system. Extra 2P2T
switches could be wired up to the power of certain drives to provide any
additional on/off control that is desired. Note that some devices must be on
for the SCSI bus to work at all. The SCSI case should also be powered on prior
to the computer and allow to come up to speed.
4.  Device Verifcation - Each SCSI device should be verified in the system
without any other devices connected. Make sure that each one works and then add
them one by one until your system is complete. A lot of wasted debug time can
be spent on a system when just one device is defective.
5.  Risk/Garrantee - If you don't have the money to replace anything that you
damage, then don't attempt to make this SCSI case. While the system is
relatively simple to complete, any time you handle computer devices there is a
risk factor. Some (or many) stores or dealers may not stand by their warrantee
if you use their device in this non-standard system. It is also difficult to
get salesmen to even understand the setup.
6.  Apple CD300i - This drive will easily mount in one of the 5" slots of the
PC case. No extra mounting hardware is required even a salesmen will try to
sell you one. The device will fit flushly on the front and doesn't need a cover
plate. A unique cable will need to be made to get the rear audio output mounted
on the back of the PC case. The front mini-headphones connector should be good
enough for most users. Note that some internal CD drives will not have the
front connector or the volume control.
7.  SCSI Speeds - The faster the SCSI speeds, the better the SCSI cabling must
be to prevent problems or delays. This PC case system is not the best, but it
is probably better than some SCSI chains out there already. It should not cause
any noticeable difference in your SCSI performance. The quality of each system
depends on how it is put together and what devices it uses. This PC case should
be acceptable for most everyone. If you are really worried about your SCSI
speed, then don't attempt to build and use this system.
8.  Other Jumpers - There will probably be some other jumpers on the
harddrives. Don't change their configuration unless you exactly what you are
doing. Drive manufacturers should be able to provide any additional information
on the extra jumpers.

COMMENTS:
The SCSI PC case is a great way to add devices and minimize the cost. This
report should be a valuable aid to anyone considering the idea. You should
think everything through clearly for yourself before attempting this adventure.
No promises are made. Other people have completed the same type of system with
success. If errors exist within this document, please except my appology and
inform me of my errors. More email help is available just by asking. I would
like to hear from anyone that found this report to be beneficial. Email me if
you can to tell me whether or not I wasted my time writing this report. Good
luck.

This file is free to distribute in complete form as long as the author's
information remains within the file. You should also notify the author if it is
included in any distributed package. (A copy of the package would be welcomed
also.)

AUTHOR'S ADDRESS:
Donald Glockzin
686 Opelousas Ct. N.
Keller, TX 76248

Email is  Glockzin_Donald@macmail1.ftw.mot.com

REVISION HISTORY:

1.0   Jan 17,94   Initial release for distribution

1.1   Jan 31,94   Misc corretions made for clarity

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.