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OLIVETTI BIOS Post Codes

  • 40 - CPU flags and register test failed
  • 41 - BIOS ROM checksum test failed
  • 42 - Disable 8253 timer channel 1
  • 43 - 8237 DMA controller test failed
  • 44 - 8259 PIC test failed
  • 45 - Install the real interrupt vectors
  • 48 - Send beep and initialize all basic hardware
  • 5B - Test option ROM's
  • 5C - Configure floppy drives
  • 5D - Test hard drive configuration
  • 5D - Test key lock switch
  • 5E - Test configuration of game port adapter
  • 5F - Detect and test math coprocessor
  • 60 - Test memory configuration above 1MB
  • 61 - Test memory configuration below 640KB
  • 62 - Test serial port configuration
  • 63 - Test parallel port configuration
  • 64 - Verify CMOS RAM checksum
  • 65 - Test CMOS RAM
  • 66 - Test CMOS RAM battery
  • 68 - Test the CPU protected mode
  • 69 - Test the CMOS clock/calendar IC
  • 6A - Test the keyboard controller
  • 6B - Test PIO port 61h
  • 6C - Test 8237 DMA controller 2
  • 6D - Test 8237 DMA controller 1
  • 6E - Test DMA page register
  • 6F - test 8259 PIC 2
  • 71 - Test 8259 PIC 1
  • 72 - Test RAM parity system
  • 73 - Test NMI
  • 74 - Test all RAM above 1MB
  • 75 - Test RAM from 8KB to 640KB
  • 76 - Test protected mod operation
  • 77 - Test CMOS RAM shutdown byte
  • 78 - Test protected mode operation
  • 79 - Test the first 8KB of RAM
  • 7A - Test the 8041 keyboard controller
  • 7B - Start memory refresh
  • 7C - Test the 8253 timer
  • 7D - BIOS ROM checksum test
  • 7E - Check and verify CMOS shutdown code
  • 7F - CPU flag and register test
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