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The tables below list the fatal and non-fatal error codes

Error tone codes for fatal errors

Error tone code Description

1-1-3

Real-time clock write/read failure

1-1-4

ROM BlOS checksum failure

1-2-1

Programmable interval timerfailure

1-2-2

DMA initialization failure

1-2-3

DMA page register write/read failure

1-3-1

RAM refresh verification failure

1-3-3

First 64KB RAM chip or data line failure (multi-bit)

1-3-4

First 64KB RAM odd/even logic failure

1-4-1

First 64KB RAM addressline failure

1-4-2

First 64KB RAM parity test in progress failure

2-1-1

First 64KB RAM failure-bit 0

2-1-2

First 64KB RAM failure-bit 1

2-1-3

First 64KB RAM failure-bit 2

2-1-4

First 64KB RAM failure-bit 3

2-2-1

First 64KB RAM failure-bit 4

2-2-2

First 64KB RAM failure-bit 5

2-2-3

First 64KB RAM failure-bit 6

2-2-4

First 64KB RAM failure-bit 7

2-3-1

First 64KB RAM failure-bit 8

2-3-2

First 64KB RAM failure-bit 9

2-3-3

First 64KB RAM failure-bit A

2-3-4

First 64KB RAM failure-bit B

2-4-1

First 64KB RAM failure-bit C

2-4-2

First 64KB RAM failure-bit D

A-16 Troubleshooting