Compaq 486 BIOS Post Codes
- 01 - CPU test failed
- 02 - Coprocessor or Weitek error
- 03 - DMA page registers
- 04 - Interrupt controller master
- 05 - Port 61 error
- 06 - Keyboard controller self test
- 07 - CMOS RAM test failed
- 08 - CMOS interrupt test failed
- 09 - CMOS clock load data test
- 10 - Programmable timer
- 11 - Refresh detect test failed
- 12 - Speed test slow mode out of range
- 13 - Protected mode test failed
- 14 - Speaker test failed
- 16 - Cache memory configuration
- 19 - Installed devices test
- 21 - Memory machine ID test failed
- 22 - Memory system ROM checksum
- 23 - Memory read/write test failed
- 24 - Memory address test failed
- 25 - Walking I/O test failed
- 26 - Increment pattern test failed
- 31 - Keyboard short test, 8042
- 32 - Keyboard long test failed
- 33 - Keyboard LED test, 8042
- 34 - Keyboard typematic test failed
- 41 - Printer failed or not connected
- 42 - Printer data register failed
- 43 - Printer pattern test
- 48 - Printer not connected
- 51 - Video controller test failed
- 52 - Video memory test failed
- 53 - Video attribute test failed
- 54 - Video character set test failed
- 55 - Video 80 x 25 mode
- 56 - Video 80 x 25 mode
- 57 - Video 40 x 25 mode test failed
- 58 - Video 320 x 200 mode color set 1
- 59 - Video 320 x 200 mode color set 1
- 60 - Diskette ID drive types test
- 61 - Diskette format failed
- 62 - Diskette read test failed
- 63 - Diskette write, read, random seek
- 65 - Diskette media ID failed
- 66 - Diskette speed test failed
- 67 - Diskette wrap test failed
- 68 - Diskette write protect test
- 69 - Diskette reset controller test
- 82 - Video memory test failed
- 84 - Video adapter test failed