Compaq 286 BIOS Post Codes
- 01 - Central processing unit
- 02 - Coprocessor
- 02 - Direct memory access
- 04 - Interrupt controller
- 05 - Port 61
- 06 - Keyboard controller
- 07 - CMOS
- 08 - CMOS
- 09 - CMOS
- 10 - Programmable timer
- 11 - Refresh detect test
- 12 - Speed test
- 14 - Speaker test
- 21 - Memory read/write
- 24 - Memory address
- 25 - Walking I/O
- 31 - Keyboard short test
- 32 - Keyboard long test
- 33 - Keyboard LED test
- 35 - Security lock test
- 41 - Printer failed
- 42 - Printer date, interrupt
- 43 - Printer pattern test
- 48 - Printer failed
- 51 - VDU controller test
- 52 - VDU controller test
- 53 - VDU attribute test
- 54 - VDU character set test
- 55 - VDU 80 x 25 mode
- 56 - VDU 80 x 25 mode
- 57 - VDU 40 x 25 mode
- 60 - Diskette drive ID test
- 61 - Format
- 62 - Read test
- 63 - Write/read compare test
- 64 - Random seek
- 65 - ID media test
- 66 - Speed test
- 67 - Wrap test
- 68 - Write protect test
- 69 - Reset controller test