Chips & Technologies BIOS Post Codes
- 00 - Error in POS Registers
- 01 - Flag Register Failed
- 02 - CPU Register Failed
- 03 - ROM Did Not Checksum
- 04 - DMA Controller Failed
- 05 - System Timer Failed
- 06 - Base 64K Failed Address Test, No Memory Installed, or Improper Config.
- 07 - Base 64K Failed RAM Test
- 08 - Interrupt Controller Failed
- 09 - Hot Interrupt Occurred
- 0A - System Timer Doesn't Interrupt
- 0B - CPU Still in Protected Mode
- 0C - DMA Page Registers Failed
- 0D - Refresh Not Occurring
- 0E - Keyboard Controller Not Responding
- 0F - Could Not Enter Protected Mode
- 10 - GDT or IDT Failed
- 11 - LDT Register Failed
- 12 - Task Register Failed
- 13 - LSL Intruction Failed
- 14 - LAR Instruction Failed
- 15 - VERR/VERW Failed
- 16 - Keyboard Controller A20 Failed
- 17 - Exception Failed/Unexpected
- 18 - Shutdown During Memory Test
- 19 - Last Used Error Code
- 1A - Copyright Checksum Error
- 1B - Shutdown During Memory Sizing
- 1C - CHIPSet Initialization
- 50 - Initialize Hardware
- 51 - Initialize Timer
- 52 - DMA Initialization
- 53 - 8259 Initialization
- 54 - Initialize CHIPSet
- 55 - Set up BMS Configuration
- 56 - Entering Protected Mode for First Time
- 57 - Size Memory Chips
- 58 - Configure Memory Chip Interleave
- 59 - Exiting Protected Mode for First Time
- 5A - Determine System Board Memory Size
- 5B - Relocate Shadow RAM
- 5C - Configure EMS
- 5D - Set Up Wait State Configuration
- 5E - Re-test Base 64K RAM after RAM Sizing
- 5F - Test Shadow RAM
- 60 - CMOS Test
- 61 - Video Test
- 63 - Protected Mode Interrupt Test
- 64 - Test Line A20
- 65 - Test Memory Address Lines
- 66 - Memory Test
- 67 - Extended Memory Test
- 68 - Timer Interrupt Test
- 69 - Real-Time Clock (RTC) Test
- 6A - Keyboard Test
- 6B - Math Coprocessor Test
- 6C - RS232 Test
- 6D - Parallel Test
- 6E - Dual Card Test
- 6F - Floppy Test
- 70 - Fixed Disk Test
- 71 - Keylock Test
- 72 - Pointing Device Test
- 90 - RAM Setup
- 91 - Calculate CPU Speed
- 92 - Check Configuration
- 93 - BIOS Initialization
- 94 - Power On Diagnostic (POD) Bootstrap
- 95 - Reset ICs
- 96 - Cache/Controller Test and Initialization
- 97 - VGA power on diagnostics and setup
- 98 - Adapter BIOS
- 99 - Re-initialize DDNIL bits
- A0 - Exception 0
- A1 - Exception 1
- A2 - Exception 2
- A3 - Exception 3
- A4 - Exception 4
- A5 - Exception 5
- A6 - Exception 6
- A7 - Exception 7
- A8 - Exception 8
- A9 - Exception 9
- AA - Exception A
- AB - Exception B
- AC - Exception C
- AD - Exception D
- C0 - System board memory failure
- C1 - I/O channel check activated
- C2 - Watchdog timer timeout
- C3 - Bus timer timeout