Funny revisiting this thread years afterwards and make a follow up necropost -I’ve been busy elsewhere.

Three months ago I confided to a friend that my next purchase would be the new C64x, after watching this review.
Yes it is a PC running a C64 themed Linux desktop, bundled with pre-configured emulators. Nonetheless it’s hardware and makes everything simpler, and I got excited, an excitement I hadn’t felt for a new computer in decades.

Speaking of emulation.
At that same time I finally got around to installing RetroArch on our Apple TV -what a blast! I ended up installing it on 3 more devices.
There’s a bunch of cores, even for MiniVMac and MAME -so you can run Apple II, Macintosh, Mac OS, Windows XP, and whatnot.
(The App Store version comes with most cores -preinstalled.)

Fast forward.
Commodore Back On Track

@Starglider 2 aka Perifractic/Perry from Retro Recipes bought Commodore -just announced. The whole original crew is back.

In the past we only had Retro-Futuristic dreams
Onwards the future will be Futuristic-Retro lived.

I've got a pile of older PC radeons just gathering dust.  Have been itching to try flashing at least some of them and give them a useful second life.

If I find I have any interesting ones, and/or similar (or different in some fun way) to the ones above, I'll mention it.

Thank you very much for your help.

Yesterday I was comparing the photos, and although there are some differences, they are very similar. I found a couple of resistors on the front that were different, so I moved them, but that didn't work either. The downside to reduced ROMs is that they don't support Open Firmware, and they don't display an image until you reach the desktop.

I'll keep investigating.

Exactly!  But also the reverse, because there's still m68k code even in MacOS 9.  So a native powerpc app will silently be transitioning to emulation many times.  Apple never bothered to convert some parts of the system to powerpc.

This especially is the case if you install extensions or whatnot that are m68k on a powerpc machine.

The UPP contains not just the pointer to the code, but info on the arch (and how to handle parameters), so when a function using one is called (with help from the mixed mode manager), it knows to use emulation or not.

This is especially important with callbacks, as the manger may be in one arch, and the callback another.  The idea with UPPs is that you never have to worry about if you're in emulation or not, as long as you use them properly.

As a bonus, if you are on an m68k machine, and are using CFM-68k there is a "mixed mode manager" also, but it is used to switch between between CFM and non CFM code.  So CFM-68k needs to use real UPPs and do a lot of the same things you do on powerpc.

Finally, if in source, the code uses UPPs, when you compile just for plain m68k, the universal headers just redefine them as plain pointers.  The same code then builds regardless.  Magic!

I think I finally understand some of this concept better after reading that Mixed Mode Manager PDF.  There may be a 68k application running in emulation mode on the PowerPC Macintosh.  When it makes calls to draw the interface, it will need to make a mode change to PowerPC native when parts of AppearanceLib get called.  So that whole library (as well as I am guessing all system libraries) have to connect to the outside world through UPPs so it can transparently make mode changes wherever necessary.

It's pretty amazing that can all work so well.  It sounds like a total recipe for disaster how things are just switching in and out of emulation mode everywhere and everything gets passed along like nothing ever happened.

Today put this card in QS, it works in OS 9, but OS X freezes for some reason.
I used one of these ROMs. I did it a year and a half ago and I don't remember the details.

Later I can run it on MDD, but it can probably be only on Saturday evening or Sunday.
I can also unload the ROM from the chip if the ones I added to the message do not give a result.

I don't use this board because I managed to find 9000 Pro 128 Mb, which broke through and works perfectly, and according to the tests, it's much faster than 9250.

V. Yakob's lower rez, smaller files... attached.

Thanks so much for the photos.

I see your EEPROM is M25P05, the 64kb version, so you must be using the reduced ROM. I installed the 128kb M25P10 EEPROM, which allows you to install the full ROM.

V. Yakob, do you have any way to download the ROM you have installed?

V. Yakob's lower rez, smaller files... attached.

Quote from: indibil on June 25, 2025, 09:30:56 AM

Hi, I don't know if anyone else is still here.

Of course, I go to the forum almost every day. Now I leave messages less often, because my Mac studies have gone far beyond OS 9.

I have such a card, it works, but 256 Mb is not displayed in the properties, only 128.
On the weekend I can install it again in QS and see how it works, this card has been in the box for a long time...
Have you changed the ROM Chip? Maybe it's not compatible?

P.S.  I don't know why, but I can't leave attachments here. I added a few photos to the archive.

This is great!!! Could you download your ROM to test it on my graphics card? The EEPROM I used is the same one I've used on many other Radeon and NVIDIA graphics cards; it's usually compatible. I accidentally didn't save the original; it got mixed up with others I'd removed, and I can't see which one it was.

It would be great to be able to see photos from both sides, in good quality. If you couldn't upload them, it's a common forum error with high-resolution photos. I usually reduce the size of the photos, and then they'll be uploaded.

Hi, I don't know if anyone else is still here.

Of course, I go to the forum almost every day. Now I leave messages less often, because my Mac studies have gone far beyond OS 9.

I have such a card, it works, but 256 Mb is not displayed in the properties, only 128.
On the weekend I can install it again in QS and see how it works, this card has been in the box for a long time...
Have you changed the ROM Chip? Maybe it's not compatible?

P.S.  I don't know why, but I can't leave attachments here. I added a few photos to the archive.