6502/notes/monochrome-video.md

Monochrome Video

• need 307_200 bits => 38_400/0x9600 Bytes

• 8K character memory

• 1x 64K RAM

• split in half

• each half into page (0x0000 - 0x4AFF)

• map character memory into top (0x6000 - 0x7FFF)

Design

• derive CS from bank register, leave LSB free -> wire to MSB of VRAM address