System self-test
AES
Crosshatch border colors:
MVS (SP-E VERSION 0)
Check order ?
Possible errors:
- WORK RAM ERROR (68k RAM)
- BACKUP RAM ERROR (Battery-backed RAM)
- COLOR RAM BANK0 ERROR (First bank of 256 palettes)
- COLOR RAM BANK1 ERROR (Second bank of 256 palettes)
- VIDEO RAM ERROR (VRAM)
- CALENDAR ERROR
- SYSTEM ROM ERROR (BIOS ROM checksum fail)
- MEMORY CARD ERROR
- Z80 ERROR (no reply to sound command $01)