MC6847 test circuit (part 4)

For this MC6847 graphic test, I chose mode CG1 (see table below). GM0, GM1 and GM2 must be 0, INV, INT/EXT and A/S are "don't care", and A/G must be 1. This mode uses two bits for pixel color, so one byte stores four pixels. The total space required to store one screen is then … Continue reading MC6847 test circuit (part 4)