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Award PnP BIOS Post Codes

  • 01 - Reserved
  • 02 - Reserved
  • 03 - Initialize EISA registers (EISA BIOS only)
  • 04 - Reserved
  • 05 - Keyboard controller self-tested
  • 06 - Reserved
  • 07 - Verify CMOS Read/Write
  • 09 - OEM specific initialization; Configure Cyrix CPU register
  • 0A - Issue CPU ID instruction; Initialize the first 32 interrupt vectors, initialize Int.'s 33 to 120, power management initialization
  • 0B - PnP initialization; verify the RTC time, detect bad battery, read the CMOS data into the BIOS stack area, assign I/O and memory for any PCI devices
  • 0C - Initialization of BIOS data area
  • 0D - Program some of chipset's value; Measure the CPU for display, initialize the video
  • 0E - Initialize APIC (multiprocessor BIOS only); Show startup screen message
  • 0F - DMA channel 0 tested
  • 10 - DMA channel 1 tested
  • 11 - DMA page registers tested
  • 12 - Reserved
  • 13 - Reserved
  • 14 - Test 8254 0 counter 2
  • 15 - Test 8259 interrupt mask bit for channel 1
  • 16 - Test 8259 interrupt mask bit for channel 2
  • 17 - Reserved
  • 19 - Test 8259 functionality
  • 1A - Reserved
  • 1B - Reserved
  • 1C - Reserved
  • 1D - Reserved
  • 1E - If an EISA NVM
  • 1F - 29 Reserved
  • 30 - Get size of base and extended memory
  • 31 - Test base and extended memory, Test base memory from 256K to 640K , test extended memory above 1MB
  • 32 - Test all on-board super I/O ports
  • 33 - Reserved
  • 3A - Reserved
  • 3B - Reserved
  • 3C - Set flag to allow CMOS setup utility
  • 3D - Install PS/2 mouse
  • 3E - Try to turn on level 2
  • 3F - Reserved
  • 40 - Reserved
  • 41 - Initialize floppy drive controller
  • 42 - Initialize hard drive controller
  • 43 - Initialize serial & parallel ports (PnP BIOS only)
  • 45 - Initialize math coprocessor
  • 46 - Reserved
  • 47 - Reserved
  • 48 - Reserved
  • 49 - Reserved
  • 4A - Reserved
  • 4B - Reserved
  • 4C - Reserved
  • 4D - Reserved
  • 4E - Show all error messages on screen
  • 4F - Ask for password, if needed
  • 50 - Write all CMOS values located in the BIOS stack back to CMOS
  • 51 - Reserved
  • 52 - Initialize all ISA ROM's; PCI initializations (PCI BIOS only), PnP initialization (PnP BIOS Only), setup shadow RAM, initialize power management
  • 53 - If not PnP BIOS, initialize ports; Initialize time in BIOS data area
  • 54 - Reserved
  • 55 - Reserved
  • 56 - Reserved
  • 57 - Reserved
  • 58 - Reserved
  • 59 - Reserved
  • 5A - Reserved
  • 5B - Reserved
  • 5C - Reserved
  • 5D - Reserved
  • 5E - Reserved
  • 5F - Reserved
  • 60 - Setup virus protection for the boot sector
  • 61 - Try to turn on level 2 cache
  • 62 - program numlock & typematic speed
  • 63 - Boot system via Int 19h
  • B0 - Unexpected interrupt in protected mode
  • B1 - Unclaimed NMI occurred
  • BE - Program defaults into chipset
  • BF - Program remaining chipset values
  • C0 - Init. all standard devices with defaults
  • C1 - Auto detect on-board DRAM & cache
  • C3 - Test first 26K DRAM
  • C5 - Copy ROM BIOS to E000-FFFF
  • FF - System booting
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