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Award Ver. 4.50 BIOS Post Codes

  • 01 - Test the Processor Status Flags: Carry, Zero, Sign, Overflow
  • 02 - Test All CPU Registers Except SS, SP, and BP with Data FF and 00
  • 03 - Initialize Coprocessor, Page Registers, CMOS Shutdown Byte, Timers, DMA
  • 04 - Test Memory Refresh
  • 05 - Keyboard Controller Initialization
  • 06 - Reserved
  • 07 - Verifies CMOS is Working Correctly, Detects Bad Battery
  • 08 - Init Chip Set, Memory Presence Test, Test Low 64K of Memory
  • 09 - Early Cache Initialization
  • 0A - Setup Interrupt Vector Table
  • 0B - Test CMOS RAM Checksum, if Bad, or INS Key Pressed, Load Defaults
  • 0C - Detect Type of Keyboard Controller and Set NUM_LOCK Status
  • 0D - Detect CPU Clock; Read CMOS to Find Out Type of Video; Init Video Adapter
  • 0E - Test Video Memory, Display Sign-On Message, Setup & Enable Shadow RAM
  • 0F - Test DMA Cont. 0; BIOS Checksum Test; Keyboard Detect and Initialization
  • 10 - Test DMA Controller 1
  • 11 - Test DMA Page Registers
  • 12 - Reserved
  • 13 - Reserved
  • 14 - Test 8254 Timer 0 Counter 2
  • 15 - Verify 8259 Channel 1 Interrupts by Turning Off and On the Interrupt Lines
  • 16 - Verify 8259 Channel 2 Interrupts by Turning Off and On the Interrupt Lines
  • 17 - Turn Off Interrupts Then Verify No Interrupt Mask Register is On
  • 18 - Force an Interrupt and Verify the Interrupt Occurred
  • 19 - Test Stuck NMI Bits; Verify NMI Can Be Cleared
  • 1A - Display CPU Clock
  • 1B - Reserved
  • 1C - Reserved
  • 1D - Reserved
  • 1E - Reserved
  • 1F - Execute EISA Initialization, or Execute ISA Tests and Clear EISA Mode Flag
  • 20 - Initialize Slot 0 (System Board)
  • 21 - Initialize Slot 1
  • 22 - Initialize Slot 2
  • 23 - Initialize Slot 3
  • 24 - Initialize Slot 4
  • 25 - Initialize Slot 5
  • 26 - Initialize Slot 6
  • 27 - Initialize Slot 7
  • 28 - Initialize Slot 8
  • 29 - Initialize Slot 9
  • 2A - Initialize Slot 10
  • 2B - Initialize Slot 11
  • 2C - Initialize Slot 12
  • 2D - Initialize Slot 13
  • 2E - Initialize Slot 14
  • 2F - Initialize Slot 15
  • 30 - Size Base Memory From 256K to 640K and Extended Memory Above 1MB
  • 31 - Test Base Memory From 256K to 640K and Extended Memory Above 1MB
  • 32 - If EISA Mode, Test EISA Memory Found in Slots Initialization
  • 33 - Reserved
  • 34 - Reserved
  • 35 - Reserved
  • 36 - Reserved
  • 37 - Reserved
  • 38 - Reserved
  • 39 - Reserved
  • 3A - Reserved
  • 3B - Reserved
  • 3C - Setup Enabled
  • 3D - Detect if Mouse is Present, Initialize Mouse, Install Interrupt Vectors
  • 3E - Initialize Cache Controller
  • 3F - Reserved
  • 40 - Display Virus Protest Disable or Enable
  • 41 - Initialize Floppy Disk Drive Controller and Any Drives
  • 42 - Initialize Hard Drive Controller and Any Drives
  • 43 - Detect and Initialize Serial & Parallel Ports and Game Port
  • 44 - Reserved
  • 45 - Detect and Initialize Math Coprocessor
  • 46 - Reserved
  • 47 - Reserved
  • 48 - Reserved
  • 49 - Reserved
  • 4A - Reserved
  • 4B - Reserved
  • 4C - Reserved
  • 4D - Reserved
  • 4E - Reboot if Manufacturing Mode; If not, Display Messages and Enter Setup
  • 4F - Ask Password Security (Optional)
  • 50 - Write All CMOS Values Back to RAM and Clear
  • 51 - Enable Parity Checker. Enable NMI, Enable Cache Before Boot
  • 52 - Initialize Option ROMs from C8000h to EFFFFh or if FSCAN Enabled to F7FFFh
  • 53 - Initialize Time Value in 40h: BIOS Area
  • 60 - Setup Virus Protect According to Setup
  • 61 - Set System Speed for Boot
  • 62 - Setup NumLock Status According to Setup
  • 63 - Boot Attempt; Set Low Stack; Boot Via INT 19h
  • B0 - If Interrupts Occurs in Protected Mode
  • B1 - If Unmasked NMI Occurs, Display Press F1 to Disable NMI, F2 Reboot
  • BE - Program Chipset Registers with Power on BIOS Defaults
  • BF - Program Chipset Registers with Setup Values
  • C0 - Turn off Chipset Cache
  • C1 - OEM Specific-Test to Size On-Board Memory
  • C5 - OEM Specific-Early Shadow Enable for Fast Boot
  • C6 - External Cache Size Detection
  • E1 - E1 Setup - Page E1
  • E2 - E2 Setup - Page E2
  • E3 - E3 Setup - Page E3
  • E4 - E4 Setup - Page E4
  • E5 - E5 Setup - Page E5
  • E6 - E6 Setup - Page E6
  • E7 - E7 Setup - Page E7
  • E8 - E8 Setup - Page E8
  • E9 - E9 Setup - Page E9
  • EA - EA Setup - Page EA
  • EB - EB Setup - Page EB
  • EC - EC Setup - Page EC
  • ED - ED Setup - Page ED
  • EE - EE Setup - Page EE
  • EF - EF Setup - Page EF
  • FF - Int 19 Boot Attempt
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