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Zenith Orion BIOS Post Codes

  • 02 - Cold boot; Enter protected mode
  • 03 - Initialize the main system board
  • F0 - Begin basic system hardware initialization
  • F1 - Clear CMOS status locators
  • F2 - Starting CLIO initialization
  • F3 - Initialize SYSCFG register
  • F4 - DXPI initialization for boot block
  • F5 - Switching cache off
  • F6 - Configure CPU socket pins
  • F7 - Checking for 80387SX math coprocessor
  • F8 - 82C206 default initialization
  • F9 - Superior default initialization
  • FF - End of machine specific boot block
  • 04 - Check flash checksum
  • 05 - Flash ok; jump into flash code (FFFD flash code)
  • 06 - Reset or power up
  • 07 - CLIO default initialization command
  • 08 - SYSCFG register initialized
  • 09 - CMOS pre flush error words initialization
  • 10 - SCP initialization
  • 11 - DRAM autosizing complete
  • 12 - Parity check enabled
  • 13 - Start of slushware test
  • 14 - Slushware at 000F0000h ok
  • 15 - BIOS ROM copied to slushware
  • 16 - Back in real mode
  • 17 - BIOS ROM slushing is complete
  • 18 - Video ROM test at C0000
  • 19 - Internal video ROM tested
  • 1A - Back in real mode
  • 1B - Internal video hardware completed
  • 1C - CPU clock frequency determined
  • 1E - BIOS RAM cleared
  • 20 - Reset
  • 21 - Continue after setting memory size
  • 22 - Continue after memory test
  • 23 - Continue after memory error
  • 24 - Continue after boot loader request
  • 25 - Jump to execute user code
  • 26 - Continue after protected mode test passed
  • 27 - Continue after protected mode test failed
  • 28 - Continue after extended protected mode failed
  • 29 - Continue after block move
  • 2A - Jump to execute user code
  • 2B - Reserved
  • 2C - Reserved
  • 2D - Reserved
  • 2E - Reserved
  • 2F - Reserved
  • 30 - Exit from protected mode
  • 31 - Test reset passed
  • 32 - Check for ROM checksum; Warm boot
  • 33 - Clear the video screen on
  • 34 - Check system DRAM config update CMOS TOTAL MEM SIZE value
  • 35 - Preload CMOS; Check CMOS contents
  • 36 - Turn off the UMB RAM
  • 37 - Turn parity generation
  • 38 - Initialize system variable
  • 39 - Check for error in power
  • 3A - Initialize SCP mode
  • 3B - Test CMOS diagnostics power reset
  • 3C - Test CPU reset 80386 and determine state number
  • 3D - Save CPU ID and processor T
  • 3E - Initialize the video and timers
  • 3F - Initialize DMA controller ports; Clear page
  • 40 - Set speed to fast for now
  • 41 - Test EEPROM checksum
  • 42 - Enable/disable parallel/serial ports, floppy disk controller, hard disk controller
  • 43 - Flush external video BIOS if on CMOS
  • 44 - Turn cache off for memory
  • 45 - Test extended RAM from 0-16K
  • 46 - Test base RAM from 0-64K
  • 47 - Determine amount of memory in system
  • 48 - Set warm boot flag
  • 49 - Clear 16K of base RAM
  • 4A - Install BIOS interrupt vector
  • 4B - Test system timer
  • 4C - Initialize interrupt
  • 4D - Enable default hardware initialization
  • 4E - Determine global I/O configuration
  • 4F - Initialize video
  • 50 - Initialize WD90C30 scratchpad
  • 51 - Check for errors before boot
  • 52 - Reserved
  • 53 - Test system and initialize
  • 54 - Reserved
  • 55 - Initialize the keyboard processor
  • 56 - Initialize the PS/2 mouse
  • 57 - Configure CLIO for mouse
  • 58 - Configure CLIO for LAN
  • 59 - Configure CLIO for SCSI
  • 5A - Configure CLIO for WAM
  • 5B - Wait for user to enter code
  • 5C - Initialize system clock TOD
  • 5D - Test and initialize floppy drive sensor
  • 5E - Check for Z150 style disk
  • 5F - Initialize Winchester hard disk subsystem
  • 60 - Set default I/O device parameters
  • 61 - Get LAN ID info from LAN
  • 62 - Install ROM's at 0C8000h
  • 63 - Install ROM's at 0E000h
  • 64 - Initialize SCSI interface
  • 65 - Run with gate A20 off
  • 66 - Really turn off the SCP
  • 67 - Set machine speed using CMOS
  • 68 - Turn off cache
  • 69 - Calibrate 1ms constants
  • 6A - Enable non-maskable interpreter
  • 6B - reserved
  • 6C - Clear the warm boot flag
  • 6D - Check for errors before boot
  • 6E - Call to interrupt 19 boot loader
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