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POST code displays
During power-up self test (POST), most PC system BIOSes write status codes to I/O port 80h or 84h. A POST code display shows the last value written to this port as a hexadecimal number. Use this code to diagnose problems. You can find a good collection of BIOS POST codes at BIOS Central. PC Engines offers these high quality POST code displays:
  • post5a miniPCI POST code display
  • post4d PCI POST code display
  • postrd remote display kit for post4d (EOL)
  • post2b ISA POST code display (EOL)
Test adapters
PC Engines offers these low cost test adapters for PCI and ISA bus:

  • post5a miniPCI POST code display with test pins
  • pcibus1b PCI bus test adapter (EOL, blank PCBs available on request)
  • isabus1a ISA bus test adapter (EOL)
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