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Power-on diagnostic error tone codes (continued)
2-1-3
I
2-1-4
2-2-l
2-2-2
2-2-4
2-3-l
2-3-2
2-3-4
2-4-l
2-4-2
2-4-3
2-4-4
3 - l - l
3 - 1 - 2 Master DMA register test failure
3-1-3
3-l -4
4-2-3
4-2-4
C-4
Troubleshooting
or data line failure-bit 0
First 64KB RAM or data line failure-bit 1
First 64KB RAM or data line failure-bit 4
First 64KB RAM or data line failure-bit 5
First 64KB RAM or data line failure-bit 6
First 64KB RAM or data line failure bit 7
First 64KB RAM or data line failure-bit 8
. .
First 64KB RAM or data line failure-bit 9
First 64KB RAM or data line failure-bit B
First 64KB RAM or data line failure-bit C
First 64KB RAM or data line failure-bit D
First 64KB RAM or data line failure-bit E
First 64KB RAM or data line failure-bit F
Slave DMA register test failure
Slave interrupt mask register test failure
Keyboard controller test failure
Display initialization test failure
Display retrace test failure
Gate A20 failure
Unexpected interrupt in protected mode
I
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