post code master - the site for BIOS, POST & BEEP code information

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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
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