TBVS 2.0 BIOS Post Codes
- 02 - Flag Test
- 04 - Register Test
- 06 - System Hardware Initialization
- 08 - Initialize Chip Set Registers
- 0A - BIOS ROM Checksum
- 0C - DMA Page Register Test
- 0E - 8254 Timer Test
- 10 - 8254 Timer Initialization
- 12 - 8237 DMA Controller Test
- 14 - 8237 DMA Initialization
- 16 - Initialize 8259/Reset Coprocessor
- 18 - 8259 Interrupt Controller Test
- 1A - Memory Refresh Test
- 1C - Base 64KB Address Test
- 1E - Base 64KB Memory Test
- 20 - Base 64KB Test (Upper 16 bits)
- 22 - 8742 Keyboard Self Test
- 24 - MC146818 CMOS Test
- 26 - Start First Protected Mode Test
- 28 - Memory Sizing Test
- 2A - Autosize Memory Chips
- 2C - Chip Interleave Enable Test
- 2E - First Protected Mode Test Exit
- 30 - Unexpected Shutdown
- 32 - System Board Memory Size
- 34 - Relocate Shadow Ram if Configured
- 36 - Configure EMS System
- 38 - Configure Wait States
- 3A - ReTest 64K Base RAM
- 3C - CPU Speed Calculation
- 3E - Get Switches From 8042
- 40 - Configure CPU Speed
- 42 - Initialize Interrupt Vectors
- 44 - Verify Video Configuration
- 46 - Initialize Video System
- 48 - Test Unexpected Interrupts
- 4A - Start Second Protected Mode Test
- 4C - Verify LDT Instruction
- 4E - Verify TR Instruction
- 50 - Verify LSL Instruction
- 52 - Verify LAR Instruction
- 54 - Verify VERR Instruction
- 56 - Unexpected Exception
- 58 - Address Line 20 Test
- 5A - Keyboard Ready Test
- 5C - Determine AT or XT Keyboard
- 5E - Start Third Protected Mode Test
- 60 - Base Memory Test
- 62 - Base Memory Address Test
- 64 - Shadow Memory Test
- 66 - Extended Memory Test
- 68 - Extended Address Test
- 6A - Determine Memory Size
- 6C - Display Error Messages
- 6E - Copy BIOS to Shadow Memory
- 70 - 8254 Clock Test
- 72 - MC146818 Real Time Clock Test
- 74 - Keyboard Stuck Key Test
- 76 - Initialize Hardware Interrupt Vectors
- 78 - Math Coprocessor Test
- 7A - Determine COM Ports Available
- 7C - Determine LPT Ports Available
- 7E - Initialize BIOS Data Area
- 80 - Determine Floppy/Fixed Controller
- 82 - Floppy Disk Test
- 84 - Fixed Disk Test
- 86 - External ROM Scan
- 88 - System Key Lock Test
- 8A - Wait for F1 Key Pressed
- 8C - Final System Initialization
- 8E - Interrupt 19 Boot Loader
- B0 - Unexpected Interrupt