Heh, I've got the opposite - a very fast machine for it's day - 386DX 40Mhz but with Hercules (mono graphics chip). What I did was a resident application that h

Heh, I've got the opposite - a very fast machine for it's day - 386DX 40Mhz but with Hercules (mono graphics chip). What I did was a resident application that has internal 320x200x256 colors buffer, and I would hack each game (looking for 0xA0000 or debugging a bit to use my buffer rather than using the graphics card directly). Then every few milliseconds I would transfer the buffer as monochrome - there was no palette transformation, just use the highest bit or something like this. It worked fine for Star Control 2, Trolls, and few other games - yes it was very weird, slow, etc. - but I got my excitement just for doing it. And some games were not playable - I was taking 10% of the available memory back then, and others were just too damn hard to crack (taking over interrupts, etc.)