MikeS
Veteran Member
I think you're right and that the 5 extra chips don't affect 40col operation, but since the OP was having problems I thought it might be a good idea to completely restore it back to a FAT40 and start from there. I'll try to find a little time and check to make sure....From my look it seems that 40 column mode only uses the two even RAM chips, but having all four 2114 chips should not create a problem if all the jumpers are set properly since the odd chips will never be enabled.
This Commodore control logic is very confusing. Mike please double check when you get a chance.