Repair help: Difference between revisions
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(Created page with "==MVS== ===No sound=== *Backup RAM corrupt, SOUND_STOP ($D00046) is non-zero. Clear Backup RAM. Category:Chips") |
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===No sound=== | ===No sound=== | ||
*Backup RAM corrupt, SOUND_STOP ($D00046) is non-zero. Clear Backup RAM. | *Backup RAM corrupt, SOUND_STOP ($D00046) is non-zero. Clear Backup RAM. | ||
===Z80 error=== | |||
Can be caused by bad components / continuity with the following: | |||
*Z80 <-> SM1 | |||
*Z80 <-> RAM | |||
Second generation specific (todo: get pin numbers in a nice table) | |||
*Z80 <-> NEO-D0 (NMI,A2-A4,IORQ) | |||
*Z80 <-> NEO-C1 (Z80 D0-D7) | |||
*NEO-D0 <-> NEO-C1 (Z80R,Z80W,Z80CLR,SDW) | |||
[[Category:Chips]] | [[Category:Chips]] | ||
Revision as of 05:12, 30 June 2011
MVS
No sound
- Backup RAM corrupt, SOUND_STOP ($D00046) is non-zero. Clear Backup RAM.
Z80 error
Can be caused by bad components / continuity with the following:
- Z80 <-> SM1
- Z80 <-> RAM
Second generation specific (todo: get pin numbers in a nice table)
- Z80 <-> NEO-D0 (NMI,A2-A4,IORQ)
- Z80 <-> NEO-C1 (Z80 D0-D7)
- NEO-D0 <-> NEO-C1 (Z80R,Z80W,Z80CLR,SDW)