Dell BIOS Post Codes
- 01 - CPU register test in progress
- 02 - CMOS read/write test failed
- 03 - BIOS ROM checksum bad
- 04 - 8254 programmable interrupt controller failed
- 05 - DMA controller initialization failed
- 06 - DMA page-register test failed
- 08 - RAM refresh verification failed
- 09 - Starting first-64K RAM test
- 0A - First-64KB RAM IC or data line bad
- 0B - First-64KB RAM odd/even logic bad
- 0C - First-64KB address line bad
- 0D - First-64KB parity error
- 10 - Bit 0 bad in first 64KB
- 11 - Bit 1 bad in first 64KB
- 12 - Bit 2 bad in first 64KB
- 13 - Bit 3 bad in first 64KB
- 14 - Bit 4 bad in first 64KB
- 15 - Bit 5 bad in first 64KB
- 16 - Bit 6 bad in first 64KB
- 17 - Bit 7 bad in first 64KB
- 18 - Bit 8 bad in first 64KB
- 19 - Bit 9 bad in first 64KB
- 1A - Bit 10 bad in first 64KB
- 1B - Bit 11 bad in first 64KB
- 1C - Bit 12 bad in first 64KB
- 1D - Bit 13 bad in first 64KB
- 1E - Bit 14 bad in first 64KB
- 1F - Bit 15 bad in first 64KB
- 20 - Slave DMA register bad
- 21 - Master DMA register bad
- 22 - Master interrupt-mask register bad
- 23 - Slave interrupt-mask register bad
- 25 - Loading interrupt vectors
- 27 - Keyboard-controller test failed
- 28 - CMOS RAM battery bad
- 29 - CMOS configuration validation in progress
- 2B - Video-memory test failed
- 2C - Video initialization failure
- 2D - Video-retrace failure
- 2E - Searching for a video ROM
- 30 - Switching to video ROM
- 31 - Monochrome operation OK
- 32 - Color (CGA) operation OK
- 33 - Color operation OK
- 34 - Timer-tick interrupt in progress (or bad)
- 35 - CMOS shutdown test in progress (or bad)
- 36 - Gate A20 bad
- 37 - Unexpected interrupt in protected mode
- 38 - RAM test in progress or high address line is bad
- 3A - Interval timer channel 2 bad
- 3B - Time-of-day test bad
- 3C - Serial-port test bad
- 3D - Parallel -port test bad
- 3E - Math co-processor test bad
- 3F - Cache-memory test bad