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Acer BIOS POST Codes

  • 04 - CPU verification; POST start
  • 08 - Shutdown condition 0; Shutdown byte 0
  • 0C - BIOS ROM checksum tested
  • 10 - CMOS ROM shutdown byte tested
  • 14 - DMA controller tested
  • 18 - System timer initialized
  • 1C - Memory refresh system tested
  • 1E - Memory type determined
  • 20 - Base 128K memory tested
  • 24 - 8042 keyboard controller tested
  • 28 - CPU descriptor instruction tested
  • 2C - 8259 PIT tested
  • 30 - Temporary Interrupts located and initialized
  • 34 - BIOS Interrupt vectors and routines configured
  • 38 - CMOS RAM tested
  • 3C - Memory size determined
  • 40 - Shutdown condition 1
  • 44 - Video BIOS ROM initialized
  • 45 - RAM initialized and tested
  • 46 - Cache memory and controller initialized and tested
  • 48 - Memory tested
  • 4C - Shutdown condition 3
  • 50 - Shutdown condition 2
  • 54 - Shutdown condition 7
  • 58 - Shutdown condition 6
  • 5C - Keyboard and auxiliary I/O tested
  • 60 - BIOS Interrupt routines setup
  • 64 - RTC tested
  • 68 - Floppy drive and controller tested
  • 6C - Hard drive and controller tested
  • 70 - Parallel port tested
  • 74 - Serial port tested
  • 78 - Time of day setup
  • 7C - Optional ROM's searched for and started
  • 80 - Math coprocessor tested
  • 84 - Keyboard tested
  • 88 - System initialized
  • 8C - System initialized
  • 90 - Operating system boot process started
  • 94 - Shutdown condition 5
  • 98 - Shutdown condition A
  • 9C - Shutdown condition B
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