Checkpoint Codes for AMI BIOS 
        Release date prior to 4/9/90 
        
        Code    Meaning
        
        01      NMI disabled & 286 reg. test about to start
        02      286 register test over
        03      ROM checksum OK
        04      8259 initialization OK
        05      CMOS pending interrupt disabled
        06      Video disabled & system timer counting OK
        07      CH-2 of 8253 test OK
        08      CH-2 delta count test OK
        09      CH-1 delta count test OK
        0A      CH-0 delta count test OK
        0B      Parity status cleared
        0C      Refresh & system timer OK
        0D      Refresh link toggling OK
        0E      Refresh period ON/OFF 50% OK
        10      Confirmed refresh ON & about to start 64K memory
        11      Address line test OK
        12      64K base memory test OK
        13      Interrupt vectors initialized
        14      8042 keyboard controller test OK
        15      CMOS read/write test OK
        16      CMOS checksum/battery check OK
        17      Monochrome mode set OK
        18      Color mode set OK
        19      About to look for optional video ROM
        1A      Optional video ROM control OK
        1B      Display memory read/write test OK
        1C      Display memory read/write test for alternate display OK
        1D      Video retrace check OK
        1E      Global equipment byte set for video OK
        1F      Mode set call for Mono/Color OK
        20      Video test OK
        21      Video display OK
        22      Power on message display OK
        30      Virtual mode memory test about to begin
        31      Virtual mode memory test started
        32      Processor in virtual mode
        33      Memory address line test in progress
        34      Memory address line test in progress
        35      Memory below 1MB calculated
        36      Memory size computation OK
        37      Memory test in progress
        38      Memory initialization over below 1MB
        39      Memory initialization over above 1MB
        3A      Display memory size
        3B      About to start below 1MB memory test
        3C      Memory test below 1MB OK
        3D      Memory test above 1MB OK
        3E      About to go to real mode (shutdown)
        3F      Shutdown successful and and entered in real mode
        40      About to disable gate A-20 address line
        41      Gate A-20 line disabled successfully
        42      About to start DMA controller test
        4E      Address line test OK
        4F      Processor in real mode after shutdown
        50      DMA page register test OK
        51      DMA unit-1 base register test about to start
        52      DMA unit-1 channel OK, about to begin CH-2
        53      DMA CH-2 base register test OK
        54      About to test f/f latch for unit-1
        55      f/f latch test both unit OK
        56      DMA unit 1 & 2 programmed OK
        57      8259 initialization over
        58      8259 mask register check OK
        59      Master 8259 mask register OK, about to start slave
        5A      About to check timer and keyboard interrupt level
        5B      Timer interrupt OK
        5C      About to test keyboard interrupt
        5D      ERROR! timer/keyboard interrupt not in proper level
        5E      8259 interrupt controller error
        5F      8259 interrupt controller test OK
        70      Start of keyboard test
        71      Keyboard BAT test OK
        72      Keyboard test OK
        73      Keyboard global data initialization OK
        74      Floppy setup about to start
        75      Floppy setup OK
        76      Hard disk setup about to start
        77      Hard disk setup OK
        79      About to initialize timer data area
        7A      Verify CMOS battery power
        7B      CMOS battery verification done
        7D      About to analyze diagnostic test results for memory
        7E      CMOS memory size update OK
        7F      About to check optional ROM C000:0
        80      Keyboard sensed to enable setup
        81      Optional ROM control OK
        82      Printer global data initialization OK
        83      RS-232 global data initialization OK
        84      80287 check/test OK
        85      About to display soft error message
        86      About to give control to system ROM E000:0
        87      System ROM E000:0 check over
        00      Control given to Int-19, boot loader