[Coco] Hidden 256-color -mode

[Nickolas Marentes]

Mark Marlette wrote:
Al H. had the board at the last ChicagoFest. I got to see it. You better 
give yourself more than a week. It took a development team a to develop 
that board and for a single person to reverse engineer it will take ten 
times as long.


Nick replies:
True, but we don't want to rebuild the entire computer. We are looking 
for clues that will point us into the next step of the mystery of the 
256 color mode. Things like, how many bits is the video DAC output? This 
would immediately tell us if the RGB output is even capable of driving 
more than 64 colors. James was able to determine several things just by 
looking at the early photos that Al posted so even just a few weeks 
would be better than nothing at all. A good set of detailed photos with 
the red stickers removed would also be invaluable.


Can anyone recall what version of GIME chip Brother Jeremy's CoCo3 
production prototypes were? There is a chance that the mode was removed 
from the consumer models starting with the '86 GIME. Brother Jeremy may 
have a version of the GIME that predates the '86 version.


Nickolas Marentes