Ah. Well, there are quite a few examples of using microcontrollers to directly create VGA or PAL/NTSC synced video in software. MBHP TV is another example.
What I had in mind was taking the video data from RAM and using those projects for inspiration to send that image data to a screen, bypassing the Mac analogue video circuitry altogether. That way there's no need to sync to the Mac video signal, only to the receiving screen (if I understand correctly. It's entirely possible I'm missing something here)
It might even be possible to send it to a graphical LCD, if there's one with enough pixels and a fast enough refresh. (And cheap enough). NB "fast enough" might not necessarily mean "as fast as the Mac's video".
The Parallax Propellor might be a more suitable uc for such a project, as it's way more powerful and has plenty of video output routines already created. It's also got 8 parallel processing cores, which is kind of nifty for a $20 chip.
I've thought a little about this in the past as a way of creating a classic Mac "laptop"/palmtop/UMPC, sort of like a modernised Outbound.
I hope that's clear enough.
What I had in mind was taking the video data from RAM and using those projects for inspiration to send that image data to a screen, bypassing the Mac analogue video circuitry altogether. That way there's no need to sync to the Mac video signal, only to the receiving screen (if I understand correctly. It's entirely possible I'm missing something here)
It might even be possible to send it to a graphical LCD, if there's one with enough pixels and a fast enough refresh. (And cheap enough). NB "fast enough" might not necessarily mean "as fast as the Mac's video".
The Parallax Propellor might be a more suitable uc for such a project, as it's way more powerful and has plenty of video output routines already created. It's also got 8 parallel processing cores, which is kind of nifty for a $20 chip.
I've thought a little about this in the past as a way of creating a classic Mac "laptop"/palmtop/UMPC, sort of like a modernised Outbound.
I hope that's clear enough.