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I am looking for an image of the Spectrum/8 Series III v1.3 ROM. Does anyone happen to have a board with this ROM version or know where one can be found? I have looked online, but have not had any success. Version 1.3 added support for additional SuperMac, Miro and Apple monitors -- 16", 17"...

SimplyTV (1994) is just TV out at different resolutions AFAIK, maybe with virtual desktops, etc. -- and from SuperMac's post-merger days. It comes from the multimedia cross-over era when people were (more commonly) starting to use their computers to show content on TVs (and covered a number of...

I don't know -- anything past 1992ish is out of my area. ;)

Yes...I will be showing scope timing and, of course, updating the spreadsheet with new values for SuperVideo vs. the ones that are there now.

I am going to look at the signal on a scope, see what the card is generating based on calculated timing to look for issues/errors/deviations, and see if it is possible to adjust the signal using the expected clock frequencies. The calculations should be correct, but obviously aren't since there...

Yes - if you know the resolution, the dot clock and the front porch, back porch and sync values, you can calculate everything (which you will note are the blue input boxes in the VideoHelper 2.0 spreadsheet attached above). Similarly, you can calculate one of the following missing values if you...

Changing the oscillator to a different or higher frequency is cart before the horse. I don't yet know why the timing with the exact/expected SVGA clocks isn't working. If it is not possible to manipulate the timing with the expected clocks, then looking for alternate frequencies to shift the...

Thanks for thumbnailing! :) I appreciate it. Also - love the enthusiasm! On the timing, it's not really working yet. I can get a Dell monitor to sync at 800x600, but it's more lucky than right. I am hoping to make the 2 SVGA modes work at the stock oscillator frequencies. SuperVideo does not...

He looks a little tired in that picture and isn't dancing very much. Are you sure he's getting 5V?

As you can see from the VideoHelper2.0 spreadsheet in my post above, the standard VESA SVGA timing values for 800x600 are well-known, easy to calculate, and should be correct. If you wouldn't mind, could you please remove the image in your post or convert it to a thumbnail? It does not appear to...

Just use the original. Oscillators are not rectangular boxes. ;)

I don't think Oscar ever realized he would be such a famous dancer when he did his first Megahertz Mambo at Madame Mac's Dot Clock Dance Academy. They grow up so fast. :cry:

Here is VideoHelper 1.0 from 1988 with information about programming early SuperMac cards. It went to power users who wanted to use custom configurations. Amazing that it still exists! It's certainly not perfect, but has a lot of interesting information.

I recruited Oscar the Dancing Oscillator to help me knock some of the pixel dust out of my head and made a quick spreadsheet for calculating video timing values for the TMS34061 on early SuperMac Spectrum cards (Spectrum/8, ColorCard, Spectrum/24). It is an update from the original VideoHelper...

I have original SuperMac flyers for a number of products and also own various cards (Spec/8 II, Spec/8 III, ColorCard, a Spec/24 III, a newer rev PDQ (not the original PDQ), a Thunder (which is basically just a PDQ with a different ROM), a Spec/8 SI board, an original VideoSpigot and a few Apple...

I have lots of old datasheets I was planning to make a site at some point. Also, I need to get a better scanner.

Thanks, JDW. Very kind words! I don't do much engineering anymore...but I really like this site! It is definitely rekindling my interest in programming and my old Macs, sometimes with sad discoveries, like my IIsi disaster. But, great to hang out with such talented and interested users! I also...

Is the target to make it work on newer machines that have a different slot architecture or to use it on a machine for which it was intended, using a more modern system -- like OS8.1 on a Quadra 605?

As a 24-bit PDS card that is trying to work in a 32-bit machine, it's likely going to need a Hardware Abstraction Layer (HAL) with embedded micro doing the translation with a memory buffer on the IIe side and a buffer on the 32-bit bus side. Or, in other words -- a virtualized PDS slot with...

E-M-U-L-A-T-O-R IIgs etc.