NEC VERSA P Service Manual page 110

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
E_TIMRI EQU 34h
E_SHUTD EQU 35h
E_GTA20 EQU 36h
E_PMUXI EQU 37h
E_BAMEM EQU 38h
E_TIMR2 EQU 3Ah
E_TODCK EQU 3Bh
E_SRLPT EQU 3Ch
E_PRLPT EQU 3Dh
E_80287 EQU 3Eh
Beep Codes Description of Test or Failure
4-2-1 Timer tick interrupt test in progress or failure
4-2-2 Shutdown test in progress or failure
4-2-3 Gate A20 failure
4-2-4 Unexpected interrupt in protected mode
4-3-1 RAM test in progress or failure above address
0FFFFh
4-3-3 Interval timer channel 2 test in progress or failure
4-3-4 Time-of-Day clock test in progress or failure
4-4-1 Serial port test in progress or failure
4-4-2 Parallel port test in progress or failure
4-4-3 Built-in math coprocessor test in progress or
failure
Troubleshooting and Repair 4-11