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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.

I'll look and see -- I don't know if mine do or not. I didn't notice it. I did my official 68851 PMMU upgrade today. Works fine. Goodbye HMMU. :'( :D

I think this one has negative ROI - just sayin'. :D

I think that ROM division has more to with cost/device density, speed (interleaving), space and processor interface, plus anything else that favored the design, bearing in mind that "cost" has many factors -- part management/availability, programming, assembly, etc. The simple answer that...

The ROM upgrade from Mac II ROMs to IIx/FDHD ROMs was successful. With the help of a quick python script from another online user, I split the IIx ROM at MacintoshRepository into 4 parts and then burned the 4 images into their target 27C512 devices. From there, I installed the ROMs, low to high...

I don't know. We don't know anything about the card internals, it is a PDS card and, internally, we don't know how it is managing its addressing. One possibility might be to virtualize the PDS slot. The other way might be to forget the whole thing and just use a IIe software emulator that runs...

I know what I am going to be working on tonight!

I just looked at Inside Mac 1, and was reminded of another fun use of the command key when dragging windows. Doing a command+drag lets you move a window without making it the active window. Oh, also, you may or may not know that if you hold down command key and click on the window title, it...

Yeah...but there was something more than that - like default behavior when passing false to SizeWindow()? It's nagging at me, but I just don't remember. I will just have to try it. Later, I guess.

Yes - somewhat dusty on my part. I haven't programmed in C for a long time. When I was writing the post, I almost remembered the parentheses, but I ignored that squeaking syntactic urge. :) Thanks - I will fix them. But, maybe a helpful error for this thread on learning how to program in C! :D...

The change I made was to clarify that the Finder is doing the restricting. I also think that there were other apps that followed the same restrictive vs. permissive model. And, to the point of that post, stretching windows beyond the width of their screens was originally frowned upon on...

I set up a 2-screen system in a Mac II, including a Spectrum/8 Series III in Slot $9 and a Thunder/24 in Slot $E, booting with a System 6.0.5 disk on FloppyEmu to verify the info from my original post above, which was a good 30-year trivia test! With respect to the way the Finder behaves and...

Haha - nice. Well...I may do *one more* FPU experiment with an MC68882RC33A (with a minimum operating frequency of 16.67Mhz that might just barely work). I am curious to know if it will work and if the much lower internal latency will dramatically affect the benchmarks. If it is possible to...

Yeah - I definitely have crusty C/Pascal crossover syndrome. :D Little things slip through. Thx. It's fixed.