AMIT BIOS Post Codes (Prior to April 1990): 01 NMI is disabled and the i286 register test is about to start 02 i286 register test has passed 03 ROM BIOS checksum test (32Kb from F8000h) passed OK 04 8259 programmable interrupt controller has initialized OK 05 CMOS interrupt disabled 06 Video system disabled and the system timer checks OK 07 8253/4 programmable-interval timer test OK 08 Delta counter channel 2 OK 09 Delta counter channel 1 OK 0A Delta counter channel 0 OK 0B Parity status cleared 0C The refresh and system timer check OK 0D Refresh check OK 0E Refresh period checks OK 10 Ready to start 64KB base memory test 11 Address line test OK 12 64KB base memory test OK 13 System-interrupt vectors initialized 14 8042 keyboard controller checks OK 15 CMOS read/write test OK 16 CMOS checksum and battery OK 17 Monochrome video mode OK 18 CGA color mode set OK 19 Attempting to pass control to video ROM at C0000h 1A Returned from video ROM 1B Display memory read/write test OK 1C Display memory read/write alternative test OK 1D Video retrace test OK 1E Global equipment byte set for proper video operation 1F Ready to initialize video system 20 Video test OK 21 Video display OK 22 The power-on message is displayed 30 Ready to start the virtual-mode memory test 31 virtual memory mode test started 32 CPU has switched to virtual mode 33 Testing the memory address lines 34 Testing the memory address lines 35 Lower 1MB of RAM found 36 Memory size computation checks OK 37 Memory test in progress 38 Memory below 1MB is initialized 39 Memory above 1MB is initialized 3A Memory size is displayed 3B Ready to test the lower 1MB of RAM 3C Memory test of lower 1MB OK 3D Memory test above 1MB OK 3E Ready to shutdown for real-mode testing 3F Shutdown OK- now in real mode 40 Ready to disable gate A20 41 A20 line disabled successfully 42 Ready to start DMA controller test 4E Address line test OK 4F System still in real mode 50 DMA page register test OK 51 Starting DMA controller 1 register test 52 DMA controller 1 test passed, starting DMA controller 2 register test 53 DMA controller 2 test passed 54 Ready to test latch on DMA controller 1 and 2 55 DMA controller 1 and 2 latch test OK 56 DMA controller 1 and 2 configured OK 57 8259 programmable interrupt controller initialized OK 58 8259 programmable interrupt controller mask register OK 59 Master 8259 programmable interrupt controller mask register OK 5A Ready to check timer interrupts 5B Timer interrupt check OK 5C Ready to test keyboard interrupt 5D Error detected in timer or keyboard interrupt 5E 8259 programmable interrupt controller error 5F 8259 programmable interrupt controller OK 70 Start of keyboard test 71 Keyboard controller Ok 72 Keyboard tested OK 73 Keyboard global initialization OK 74 Floppy setup ready to start 75 Floppy controller setup OK 76 Hard disk setup ready to start 77 Hard disk controller setup OK 79 Ready to initialize timer data 7A Verifying CMOS battery power 7B CMOS battery verified OK 7D Analyzing CMOS RAM size 7E CMOS memory size updated 7F Send control to adapter ROM 80 Enable the setup routine if <Delete> is pressed 82 Printer data initialization is OK 83 RS-232 data initialization is OK 84 80x87 check and test OK 85 Display any soft-error message 86 Give control to ROM E0000h 87 Return from system ROM 00 Call the Int19 boot loader AMI BIOS Post Codes (After April 1990): 01 NMI is disabled and the i286 register test is about to start 02 i286 register test has passed 03 ROM BIOS checksum test (32KB from E8000h) passed OK 04 Passed keyboard controller test with and without mouse 05 Chipset initialized...DMA and interrupt controller disabled 06 Video system disabled and the system timer checks OK 07 8254 programmable interval timer initialized 08 Delta counter channel 2 initialization complete 09 Delta counter channel 1 initialization complete 0A Delta counter channel 0 initialization complete 0B Refresh started 0C System timer started 0D Refresh check OK 10 Ready to start 64KB base memory test 11 Address line test OK 12 64KB base memory test OK 15 ISA BIOS interrupt vectors initialized 17 Monochrome video mode OK 18 CGA color mode set OK 19 Attempting to pass control to video ROM at C0000h 1A Returned from video ROM 1B Shadow RAM enabled 1C Display memory read/write test OK 1D Alternate display memory read/write test OK 1E Global equipment byte set for proper 1F Ready to initialize video system 20 Finished setting video mode 21 ROM type 27256 verified 22 The power-on message is displayed 30 Ready to start the virtual mode memory test 31 Virtual memory mode test started 32 CPU has switched to virtual mode 33 Testing the memory address lines 34 Testing the memory address lines 35 Lower 1MB of RAM found 36 Memory size computation checks OK 37 Memory test in progress 38 Memory below 1MB is initialized 39 Memory above 1MB is initialized 3A Memory size is displayed 3B Ready to test the lower 1MB of RAM 3C Memory test of lower 1MB OK 3D Memory test above 1MB OK 3E Ready to shutdown for real-mode testing 3F Shutdown Ok - now in real mode 40 Cache memory now on...Ready to disable gate A 20 41 A20 line disabled successfully 42 i486 internal cache turned on 43 Ready to start DMA controller test 50 DMA page register test OK 51 Starting DMA controller 1 register test 52 DMA controller 1 test passed, starting DMA controller 2 register test 53 DMA controller 2 test passed 54 Ready to test latch on DMA controller 1 and 2 55 DMA controller 1 and 2 latch test OK 56 DMA controller 1 and 2 configured OK 57 8259 programmable interrupt controller initialized Ok 70 Start of keyboard test 71 Keyboard controller OK 72 Keyboard test OK...Starting mouse interface test 73 Keyboard and mouse global initialization OK 74 Display setup prompt.. Floppy setup ready to start 75 Floppy controller setup OK 76 hard disk setup ready to start 77 Hard disk controller setup OK 79 Ready to initialize timer data 7A Timer data area initialized 7B CMOS battery verified OK 7E CMOS memory size updated 7F Enable setup routine if <Delete> is pressed 80 Send control to adapter ROM at C800h to DE00h 81 Return from adapter ROM 82 Printer data initialization is OK 83 RS-232 data initialization is OK 84 80x87 check and test OK 85 Display any soft error message 86 Give control to ROM at E0000h A0 Program the cache SRAM A1 Check for external cache A2 initialize EISA adapter card slots A3 Test extended NMI in EISA system 00 Call the INT19 boot loader AMI 2.2 BIOS: 00 Flag test; Testing of the CPU 03 Register test 06 Chipset test; System hardware initialized 09 BIOS checksum tested 0C Page register tested 0F 8254 timer tested 12 Memory refresh initialization 15 8237 DMA controllers tested 18 8237 DMA initialization 1B 8259 PIC initialization 1E 8259 PIC chips tested 21 Memory refresh tested 24 Base 64 address tested 27 Base 64 memory tested 2A 8742 keyboard tested 2D MC146818 RTC/CMOS 30 Protected mode started 33 Memory sizing test 36 First protected mode test passed 39 First protected mode test failed 3C CPU speed calculation 3F Read 8742 hardware switches 42 Initialize interrupt vector area 45 Verify CMOS configuration 48 Test and initialize video system 4B Unexpected interrupt tested 4E Start second protected mode test 51 Verify LDT instruction 54 Verify TR instruction 57 Verify LSL instruction 5A Verify LAR instruction 5D Verify VERR instruction 60 Address line A20 test 63 Unexpected exception tested 66 Start third protected mode test 69 Address line tested 6A Scan DDNIL bits for null pattern 6C System memory tested 6F Shadow memory tested 72 Extended memory tested 75 Verify memory configuration 78 Display CMOS error messages 7B Copy system BIOS shadow memory 7E 8254 clock tested 81 MC146818 RTC tested 84 Keyboard test 87 Determine keyboard type 8A Stuck key test 8D Initialize hardware Interrupt vectors 90 Math co-processor tested 93 Determine COM ports available 96 Determine LPT ports available 99 Initialize BIOS data area 9C Fixed/floppy controller tested 9F Floppy disk tested A2 Fixed disk tested A5 External ROM screen; Check for external ROM's A8 System key lock test AE F1 error message test AF System boot initialization B1 Call to Interrupt 19 boot loader AMI Plus BIOS: 00 Control to Interrupt 19 01 NMI disabled (Bit 7 of I/O port 70h) 02 286 register test over 03 ROM checksum OK 04 8259 PIC initialization disabled 05 CMOS Interrupt disabled 06 System timer (PIT) counting OK 07 Channel 0 of 8259 PIC test OK 08 DMA channel 2 of delta count test OK 09 DMA channel 1 of delta count test OK 0A DMA channel 0 of delta test count OK 0B Parity status cleared (DMA/PIT) 0C Refresh and system time check OK (DMA/PIT) 0D Refresh link toggling OK (DMA/PIT) 0E Refresh period ON/OFF 50% OK 10 About to start 64K memory 11 Address line tested OK 12 64K base memory tested OK 13 Interrupt vectors initialized 14 8042 keyboard controller tested 15 CMOS Read/Write test OK 16 CMOS checksum/battery tested 17 Monochrome mode set OK (6845) 18 Color (CGA) mode set OK (6845) 19 Video ROM search 1A Optional video ROM OK 1B Display memory Read/Write test OK 1C Alternate display memory OK 1D Video retrace check Ok 1E Global byte set for video Ok 1F Mode set for mono/color OK 20 Video test OK 21 Video display OK 22 Power on message display OK 30 Readying virtual mode memory test 31 Virtual mode memory test started 32 Processor in virtual mode 33 Memory address line test 34 Memory address line test 35 Memory below 1MB calculated 36 Memory size computation OK 37 Memory test in progress 38 Memory initialization below 1MB 39 Memory initialization above 1MB 3A Display memory size 3B Ready to start memory below 1MB 3C Memory test below 1MB OK 3D Memory test above 1MB OK 3E Ready to switch to real mode 3F Shutdown successful 40 Ready to disable gate A-20 (8042) 41 Gate A-20 disabled (8042) 42 About to test DMA controller (8237) 4E Address line test OK 4F Processor in real mode 50 DMA page register test OK 51 DMA unit-1 base register OK 52 DMA unit-1 channel register OK 53 DMA channel-2 base register test OK 54 About to test both units OK 55 F/F latch tests both units OK 56 DMA units 1 & 2 programmed OK 57 8259 PIC initialization OK 58 8259 PIC mask register check OK 59 Master 8259 PIC mask register OK 5A Check timer and keyboard Interrupt 5B PIT timer Interrupt OK 5C About to test keyboard Interrupt 5D ERROR! Timer/keyboard Interrupt 5E 8259 PIC Interrupt controller error 5F 8259 PIC Interrupt controller test OK 70 Start of keyboard test 71 Keyboard test OK 72 Keyboard test OK 73 Keyboard global data initialize (8042) 74 Floppy controller setup about to start 75 Floppy controller setup OK 76 Hard disk controller setup about to start 77 Hard disk controller setup OK 79 About to initialize timer data 7A Verify CMOS battery power 7B CMOS battery verification done 7D Analyze test results for memory 7E CMOS memory size update OK 7F Check optional ROM C0000h 80 Keyboard sensed to enable setup 81 Optional ROM control OK 82 Printer global data init OK 83 RS-232 global data init OK 84 80287 check/test OK 85 About to display soft error 86 Give control to system ROM E0000h 87 System ROM E0000h check over 00 Call to Interrupt 19 for boot loader AMI Color: 00 Control to Int 19 boor loader 01 CPU flag test 02 Power-on delay 03 Chipset initialization 04 Soft/hard reset 05 ROM enable 06 ROM BIOS checksum 07 8042 keyboard controller tested 08 8042 keyboard controller tested 09 8042 keyboard controller tested 0A 8042 keyboard controller tested 0B 8042 protected mode tested 0C 8042 keyboard controller tested 0D 8042 keyboard controller tested, CMOS 0E CMOS checksum tested 0F CMOS initialization 10 CMOS/RTC status OK 11 DMA/PIC disable 12 DMA/PIC initialization 13 Chipset/memory initialization 14 8254 PIT timer tested 15 8254 PIT channel 2 timer tested 16 8254 PIT channel 1 timer tested 17 8254 PIT channel 0 timer tested 18 Memory refresh test (PIC) 19 Memory refresh test (PIC) 1A Check 15-microsecond refresh (PIT) 1B Check 30-microsecond refresh (PIT) 20 Base 64K memory tested 21 Base 64K memory parity tested 22 Memory Read/Write 23 BIOS vector table initialization 24 BIOS vector table initialization 25 Turbo check of 8042 keyboard controller 26 Global data table for keyboard controller; turbo 27 Video mode tested 28 Monochrome tested 29 Color (CGA) tested 2A Parity-enable tested 2B Optional system ROM's check start 2C Video ROM check 2D Reinitialize main chipset 2E Video memory tested 2F Video memory tested 30 Video adapter tested 31 Alternate video adapter tested 32 Alternate video adapter tested 33 Video mode tested 34 Video mode tested 35 Initialize BIOS ROM data area 36 Power-on message display 37 Power-on message display 38 Read cursor position 39 Display cursor reference 3A Display BIOS setup message 40 Start protected mode tested 41 Build mode entry 42 CPU enters protected mode 43 Protected mode Interrupt enable 44 Check descriptor tables 45 Check memory size 46 Memory Read/Write tested 47 Base 640K memory tested 48 Check 640K memory size 49 Check extended memory size 4A Verify CMOS extended memory 4B Check for soft/hard reset 4C Clear extended memory locations 4D Update CMOS memory size 4E Base RAM size displayed 4F Memory Read/Write test on 640K 50 Update CMOS on RAM size 51 Extended memory tested 52 Re-size extended memory 53 Return CPU to real mode 54 Restore CPU registers 55 A-20 gate disabled 56 BIOS vector recheck 57 BIOS vector check complete 58 Clear BIOS display setup message 59 DMA, PIT tested 60 DMA page register tested 61 DMA #1 tested 62 DMA #2 tested 63 BIOS data area check 64 BIOS data area checked 65 Initialize DMA chips 66 8259 PIC initialization 67 Keyboard tested 80 Keyboard reset 81 Stuck key and batch test 82 8042 keyboard controller tested 83 Lock key check 83 Compare memory size with CMOS 85 Password/soft error check 86 XCMOS/CMOS equipment check 87 CMOS setup entered 88 Reinitialize chipset 89 Display power-on message 8A Display wait and mouse check 8B Shadow any option ROM's 8C Initialize XCMOS settings 8D Reset hard/floppy drives 8E Floppy compare to CMOS 8F Floppy disk controller initialization 90 Hard disk compare to CMOS 91 Hard disk controller initialization 92 BIOS data table check 93 BIOS data check hat halfway 94 Set memory size 95 Verify display memory 96 Clear all Interrupts 97 Optional ROM's check 98 Clear all Interrupts 99 Setup timer data/RS232 base 9A RS232 test; Locate and test serial ports 9B Clear all Interrupts 9C NPU test 9D Clear all Interrupts 9E Extended keyboard check 9F Set numlock A0 Keyboard reset A1 Cache memory test A2 Display any soft errors A3 Set typematic rate A4 Set memory wait states A5 Clear screen A6 Enable parity/NMI A7 Clear all Interrupts A8 Control to ROM at E0000 A9 Clear all Interrupts AA Display configuration 00 Call to Interrupt 19 boot loader AMI Win BIOS: 00 Control to Int 19 boot loader 01 Disable NMI 02 Power-on delay 03 Soft reset power-on 05 Disable cache 06 Uncompressed POST code 08 CMOS checksum 08 CMOS initialization 0A CMOS initialization for date and time 0B Initialization before keyboard batch 0C Batch command to keyboard controller 0D Verify batch command 0E Initialize after KB controller batch 0F Write KB command byte 10 Pin 23/24 block/unblock command 11 Check for <INS> key command 12 DMA/PIC disable 13 Chipset initialization 14 8254 timer test 19 Memory refresh test 20 Base 64K memory test 23 Set BIOS stack, setup before int. vector init 24 Interrupt vector initialization 25 Read input port of 9042 chip, clear password 26 Initialize global data for turbo switch 27 Initialize before setting video mode 28 Set video mode 2A Initialize BUS 2B Setup before operational video check 2C Control to optional video ROM 2D Proc. after optional video ROM routine 2E Display memory Read/Write test if no EGA/VGA 2F Display memory Read/Write test 30 Retrace check 31 Display alternate memory Read/Write check 32 Alternate display retrace check 34 Set display mode 37 Display power-on message 38 Initialize BUS types 39 Display BUS initialization error messages 3A Display the hit <DEL> message 3B Virtual modem memory test 40 Prepare descriptor tables 42 Enter virtual mode for memory test 43 Enable Interrupts for diagnostic mode 44 Initialize data to check memory wrap at 0:0 45 Check memory wrap, find total memory amount 46 Memory write test 47 640K base memory write test 48 Determine memory below 1MB 49 Determine memory above 1MB 4B Check for soft reset, clear memory below 1MB 4C Clear memory above 1MB 4D Save memory size 4E Display first 64K memory size 4F Sequential and random memory test 50 Displayed memory size 51 Above 1MB memory test 52 Save memory size information 53 Enter real mode 54 Disable gate A-20 line 57 Adjust memory size 58 Clear hit <DEL> message 59 DMA/PIC test 60 DMA #1 base register test 62 DMA #2 base register test 65 Program DMA unit 1 and 2 66 Initialize 8259 Interrupt controller 67 Keyboard test 7F Enable extended NMI sources 80 Stuck key and batch test 81 Keyboard controller test 82 Write command byte, initialize circular buffer 83 Lock key check 84 Compare memory size with CMOS 85 Password/soft error check 86 Programming before check 87 Execute CMOS setup 88 Programming after setup 89 Power-on display 8B Shadow main and video BIOS 8C Setup options after CMOS setup 8D Initialize mouse 8E Reset hard disk controller 8F Floppy setup 91 Hard disk setup 94 Base/extended memory size 95 Init. PCI/VLB BUS optional ROM's from C800 96 Initialize before C800 optional ROM control 97 Control to optional ROM 98 Processing after optional ROM control 99 Setup timer data area/printer base address 9A Set RS-232 base address 9B Initialize before NPU test 9C NPU initialization 9D Initialization after NPU test 9E Check extended KB, KB ID and num-lock 9F Issue keyboard ID command A0 Reset keyboard ID flag A1 Cache memory test A2 Display and soft errors A4 Program memory wait states A5 Clear screen, enable parity NMI A7 Init. needed before control to E000 ROM A8 Control to E000 ROM A9 Init. needed after control to E000 ROM AA Display system configuration B0 Uncompressed SETUP code for hot-key B1 Copy any code to specific area C2 Disable NMI, power-on delay C5 Enable ROM, disable cache C6 ROM BIOS checksum C7 CMOS shutdown register test C8 CMOS shutdown CA Initialize CMOS date and time CB Initialization before keyboard batch CD BAT command to keyboard controller CE Installation after keyboard controller batch CF Write keyboard command byte D1 Check for <INS> key command D2 Disable DMA and Interrupt controllers D3 Chipset initialization/auto detect memory D4 Uncompressed RUNTIME code D5 RUNTIME code uncompressed DD Control to shadow RAM at F000:F000 AMI Ez-Flex BIOS: 01 NMI disabled; Start CPU flag test 02 Power on delay 03 Initialize system chipset 04 Check keyboard for soft/hard reset 05 Enable ROM 06 ROM BIOS checksum tested 07 8042 keyboard controller tested 08 8042 keyboard controller tested 09 8042 keyboard controller tested 0A 8042 keyboard controller tested 0B 8042 protected mode tested 0C 8042 keyboard controller tested 0D CMOS RAM shutdown register tested 0E CMOS checksum tested 0F CMOS initialization 10 CMOS/RTC status OK 11 Disable DMA and PIC 12 Video display disabled 13 Chipset and memory initialized 14 8254 PIT tested 15 PIT channel 2 tested 16 PIT channel 1 tested 17 PIT channel 0 tested 18 PIT memory refresh tested 19 PIT memory refresh tested 1A Check 15 microsecond refresh (PIT) 1B Base 64K memory tested 20 Address lines tested 21 Base 64K parity memory tested 22 Memory Read/Write tested 23 Perform setup's prior to initialization of the vector table 24 Initialize BIOS vector table in lower 1KB of system RAM 25 8042 keyboard controller tested 26 Global for keyboard controller tested 27 Perform setups for vector table initialization 28 Monochrome video mode tested 29 Video (CGA) color mode tested 2A Parity enable tested 2B Check for optional ROM's 2C Check for video ROM 2D Determine if EGA/VGA is installed 2E Video memory is tested if non EGA/VGA 2F Video memory tested 30 Video adapter tested 31 Alternate video memory tested 32 Alternate video adapter tested 33 Video mode tested 34 Video mode tested 35 BIOS ROM data area initialized 36 Power on display cursor set 37 Power on message displayed 38 Cursor position read 39 Display cursor reference 3A Display Setup message 40 Protected mode tested 41 Build descriptor tables 42 CPU enters protected mode 43 Protected mode interrupt enabled 44 Descriptor tables checked 45 Memory size checked 46 Memory read/Write tested 47 Base 640K memory tested 48 Memory below 1MB checked for 49 Memory above 1MB checked for 4A ROM BIOS data area checked 4B Memory below 1MB cleared for soft reset 4C Memory above 1MB cleared for soft reset 4D Update CMOS memory size 4E Display base 64K memory test 4F Memory test on base 640K performed 50 RAM size updated for shadow operation 51 Extended memory test performed 52 System is prepared for real mode 53 CPU is returned to real mode 54 CPU registers are returned to real mode 55 A20 gate disabled 56 BIOS data area rechecked 57 BIOS data area check complete 58 Setup message displayed 59 DMA register page tested 60 Display memory verified 61 DMA #1 tested 62 DMA #2 tested 63 Perform BIOS data area check 64 BIOS data area checked 65 DMA initialized 66 8259 PIC initialized 67 Keyboard tested 80 Keyboard reset 81 Check for stuck key and batch test 82 8042 keyboard controller tested 83 Lock key checked 84 Memory size compared to CMOS 85 Password and soft error checked 86 CMOS equipment checked performed 87 CMOS setup performed if selected 88 Main chipset reinitialized after CMOS setup 89 Power on message displayed 8A Mouse check and wait message displayed 8B Any ROM's attempted to be shadowed 8C System initialized through CMOS settings 8D Hard drives and floppy drives reset 8E Floppy disk setup compared to CMOS settings 8F Floppy controller initialized 90 Hard disks setup compared to CMOS settings 91 Hard disk controller initialized 92 BIOS data table checked 93 BIOS data table check complete 94 Memory size set 95 Display memory verified 96 All Interrupts cleared 97 Optional ROM's checked for 98 All Interrupts cleared 99 Timer data setup 9A Serial ports checked for 9B All Interrupts cleared 9C Math coprocessor checked 9D All Interrupts cleared 9E Extended keyboard checked 9F NumLock set on keyboard A0 Keyboard reset A1 Cache memory size tested A2 Display any soft errors A3 Typematic rate set A4 Memory wait states set A5 Display is cleared A6 Parity and NMI enabled A7 All Interrupts cleared A8 System control is turned over to ROM at E0000 A9 All Interrupts cleared AA Displayed configuration 00 Call to Interrupt 19 for boot loader
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