Kontron COMe Eval Carrier T6 - Manual (Page 36)

COM Express® Eval Carrier Type 6
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5.13 CPLD & POST-Code Display
Power Management control, 4 digits LPC/PCI Port 80/81 Post Code and
additional GPIOs are implemented in onboard Altera CPLD (U28).
Port 80/81 POST Code
The 7-segment display D63/D64 for Port 81 and D61/62 for Port 80 shows BIOS
status codes during boot-up process.