Troubleshooting and Repair 4-11
Table Section 4-4 lists codes that are reported via DIAGNP and the speaker.
Table Section 4-4 Diagnostic Output and Beep Codes Looped on POST
Diagnostic Port Output Beep Codes Description of Test or Failure
E_TIMRI EQU 34h 4-2-1 Timer tick interrupt test in progress or failure
E_SHUTD EQU 35h 4-2-2 Shutdown test in progress or failure
E_GTA20 EQU 36h 4-2-3 Gate A20 failure
E_PMUXI EQU 37h 4-2-4 Unexpected interrupt in protected mode
E_BAMEM EQU 38h 4-3-1 RAM test in progress or failure above address
0FFFFh
E_TIMR2 EQU 3Ah 4-3-3 Interval timer channel 2 test in progress or failure
E_TODCK EQU 3Bh 4-3-4 Time-of-Day clock test in progress or failure
E_SRLPT EQU 3Ch 4-4-1 Serial port test in progress or failure
E_PRLPT EQU 3Dh 4-4-2 Parallel port test in progress or failure
E_80287 EQU 3Eh 4-4-3 Built-in math coprocessor test in progress or
failure
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