Diagnostic Output And Beep Codes Looped On Post - NEC POWERMATE 4100M Service Manual

4-12 Maintenance and Troubleshooting
Table Section 4-5 lists codes that are reported via the diagnostic port and the speaker only
if MANLOOP EQU TRUE and the "manufacturing jumper" indicates loop on POST. Oth-
erwise, these errors are reported via the screen and POST continues. Use of the manufac-
turing jumper requires working correctly configured CMOS.
Table Section 4-5 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 Math coprocessor test in progress or failure