SpritesMind.Net

Thanks again for all your invaluable info!!

And yes, on my deep-dive into BIOS-less VGA programming, I found how to "poll" for when the VGA CRTC is in a blanking period. That was a load of fun to wrap my head around!!

The result of my several late nights can be found here :lol: https://github.com ...

That all helps a lot, thank you!!

I've nearly got my "68K doing PC stuff" demo to a state where I'm happy to call it done for now. I've set up a simple mode 13h screen with palette cycling.

Since I can't get interrupts from the PC side, I can't wait for Vblank (as far as I know) to do VGA register ...

I'm loath to drag up a ~6 year old thread, but I've started to put together some demos based on the information in this thread.

https://github.com/RetroSwimAU/TeradriveCode

So if there is any more information, test code, annotated disassembly etc that you guys could share, I'd be most grateful.

I ...