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