327 B
327 B
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