System self-test: Difference between revisions

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[[Category:Base system]]
[[Category:Base system]]
[[Category:Repairs]]

Revision as of 04:35, 12 October 2016

Todo: Order of checks.

Cartridge systems

Information by Channelmaniac.

Error No game WORK RAM ERROR COLOR RAM ERROR VIDEO RAM ERROR SYSTEM ROM ERROR MEMORY CARD ERROR
AES
MVS Crosshatch Screenshot needed
Meaning All tests passed (AES does not test the Z80). Cartridge not detected. 68k user RAM R/W error Palette RAM R/W error VRAM R/W error System ROM checksum mismatch Memory card R/W error (only tested if card present and blank)

MVS checks

Additionnal checks are performed on MVS systems:

Error BACKUP RAM ERROR Calendar freeze CALENDAR ERROR Z80 ERROR
Display
Meaning Backup RAM R/W error RTC isn't giving Time Pulse RTC ran to slow or too fast Z80 didn't reply to command

When a MVS board is powered up without cartridges inserted, the border color around the edges of the crosshatch screen indicates the system ROM region:

  • Green: 6 slot (ROM name ?)
  • Cyan: USA, SPU2
  • Blue: Spanish, SPS2
  • Red: Japanese, SPJ2

UniBios tests

The Universe BIOS does not use the above color codes to indicate errors.