Thread

What is the Resolution Depth on 68K Video?

What is the Resolution Depth on 68K Video? Hardware 19 posts Oct 27, 2014 — Nov 1, 2014

#1 Mon, 27 Oct 2014 - 04:37

I finally figured out on one of my Mac to VGA Adapter how to get other resolution settings on a specific switch setting on the adapter. Thing is this, it does not say what the resolution size it, the choices are:

Macintosh High Resolution Display

640X480 or 640X400 (depending on the switch settings)

Macintosh Portrait Display

What are the Macintosh High Resolution Display and Macintosh Portrait Display resolutions? They are definitely "bigger" than 640X480 setting but their sizes are not stated.

#2 Mon, 27 Oct 2014 - 05:04

http://home.earthlink.net/~gamba2/vid-mon-matrix.html

Hi Res back in that day was a whopping 640x480 as well.

edit: forgot to ask, which Mac, MoBo Video or NuBus Card?

.

#3 Mon, 27 Oct 2014 - 14:03

It's from an LC III motherboard with a full load of VRAMand the Apple 8/24bit video card on the IIfx.

I notice that on 640X480 that the desktop image is smaller on the screen with large test and icons, but on the other modes the screen is wider and taller, with the text and icons being smaller but the same style. I think it's doing 800X600.

Also the color depth is different. On 640X480, it gives me Thousands or Millions of colors while on the other resolution it gives me only 256 colors.

#4 Mon, 27 Oct 2014 - 14:26

Something is definitely wrong in that case. LCD or CRT and is, or are they, MultiSync?

http://home.earthlink.net/~gamba2/cpumonmatrix.html

Which brand adapter? If it's generic/no brand, post a pic, I've got a drawer full of manuals and adapters.

.

#5 Mon, 27 Oct 2014 - 19:06

Its a Multi-Sync CRT Monitor - the Gateway EV700.

The adapter is a no-name brand with a dial on it with letters A - P and Dip Switches 1 - 9 though maybe 5 of those switches work; like V-Sync, H-Sync, Composite (Pins 7 - 9) and couple of others (1, 4 & 5). On the dial selections G, J, L, and M work on both machines, with those mentioned dip switches set to on.

#6 Tue, 28 Oct 2014 - 04:34

Sounds to me like it has a picture of the Liberty Bell in the center of the dial?

If so: switches 1-6 off - switches 7-9 on

Dial - Resolution - Output

D - 1024 x 768 - 19" Color

F - 832 x 624 - 16" Color

G - 640 x 480/800 x 600 - VGA/SVGA

H - PAL - PAL

J - 640 x 480 - 13"/14" RGB

L - NTSC - NTSC

M - 1152 x 870 - Apple 2 Page Mono

N - 512 x 384 - 12" RGB

O - 640 x 870 Apple Portrait

P - 1152 x 870 - 21" Color

#7 Tue, 28 Oct 2014 - 20:59

I just got one of those really nice ViewSonic adapters. Has dip switch settings for everything from 512x384 to 1600x1200.

Best of all it has all the settings molded into the back of the plastic case, so you'll always know how to set the switches.

#8 Tue, 28 Oct 2014 - 21:20

I've got their VMAC-1 that does Multi-Res up to 1920x1080, but it lists 1600x1200 as Macintosh G3 Multi-Res?

I got a nice short one a long time ago that does 1600x1200 to hold for the day I finally got the right monitor/card combo. It seemed like that res put too much wear and tear on my "Classic 21" CRTs. The 22" Viewsonic does it fine, but when I got the Dell Ultra-Sharp 20" LCD, that became my main display.

If elfen has a Liberty Adapter, the tag must have fallen off the back

#9 Thu, 30 Oct 2014 - 21:40

The Unimacfly is pretty good:

Mac_VGA.jpg.696ad23564e4524718ae917ee5a6c26a.jpg

Here's one on Ebay:

http://www.ebay.com/itm/251693498534

It's basically the viewsonic adapter mentioned above. Doesn't have specific setting for beyond 1280 X 1024 I think, but does have "multi-res" settings, which should let you adjust the output beyond just the specified resolutions.

#10 Thu, 30 Oct 2014 - 21:46

What is with the sparkle-unicorn paint job on that one?

#11 Thu, 30 Oct 2014 - 22:22

That's just how the metal is, it's the result of a certain commercial controlled oxidation process that prevents corrosion, it creates multiple random surface oxide states for the metal, with each one being a different color, which ends up causing a sort of rainbow glitter effect. I haven't seen it used in quite some time, I think it has fallen out of favor.

#12 Thu, 30 Oct 2014 - 23:03

Huh. I've had devices with that treatment but don't think I've ever seen it make something so... purple. Maybe it's the lighting.

#13 Fri, 31 Oct 2014 - 01:06

Oh yeah, the purple is just a bias created by the device taking the pic, it doesn't look that way IRL. I think whatever they were trying to take the pic with did the best is could with so many tiny dots of different colors and intensities on a refractive surface by giving it a purple hue. I would imagine the CMOS sensor was freaking out trying to deal with a surface like that.

#14 Fri, 31 Oct 2014 - 03:33

Silver Halide Emulsion RULZ! ;D

#15 Fri, 31 Oct 2014 - 20:10

Trash80toHP_Mini said:
Sounds to me like it has a picture of the Liberty Bell in the center of the dial?

Sorry to answer so late in the thread, but yes. It does have the liberty bell on it.

#16 Fri, 31 Oct 2014 - 20:31

Well, then there you go!

#17 Fri, 31 Oct 2014 - 20:50

I think I had one of those Liberty Bell ones. It was an excellent device (when paired with a multisync CRT) for using with A/UX; MacOS on a Quadra is fine with using the "MultiSync" setting but A/UX seemed happier when it could read the sense signals and be told "this is what you have".

#18 Fri, 31 Oct 2014 - 21:08

I needed a nicer one, I just have a straight through NEC MultiSync adapter.

#19 Sat, 1 Nov 2014 - 00:39

I've got a freakin' pile of VGA adapters of every sort from various parts lots that I've snagged over the years, including several of the one in trag's post, IIRC.

Gorgonops said:
. . . but A/UX seemed happier when it could read the sense signals and be told "this is what you have".

That's cause it's older'n dirt and a UNIX kluge to boot!