PHoenix POST codes

01 CPU register tests in progress

02 CMOS write/read bad

03 ROM BIOS checksum bad

04 8254 timer bad

05 DMA init bad

06 DMA page register write/read bad

08 RAM refresh verification bad

09 low 64K RAM test

0A low 64KRAM chip or dataline bad, multi-bit?

0B low 64KRAM odd/even logic bad

0C address line bad low 64KRAM

0D parity bad low 64KRAM

10 bit 0 low 64K bad

11 bit 1 low 64K bad

12 bit 2 low 64K bad

13 bit 3 low 64K bad

14 bit 4 low 64K bad

15 bit 5 low 64K bad

16 bit 6 low 64K bad

17 bit 7 low 64K bad

18 bit 8 low 64K bad

19 bit 9 low 64K bad

1A bit 10 low 64K bad

1B bit 11 low 64K bad

1C bit 12 low 64K bad

1D bit 13 low 64K bad

1E bit 14 low 64K bad

1F bit 15 low 64K bad

20 slave DMA register bad

21 master DMA register bad

22 master INT mask register bad

23 slave INT mask register bad

25 INT vector loading in progress

27 keyboard ctrl bad

28 CMOS power bad, checksum calculation in progress

29 CMOS configuration validation in progress

2B screen init bad

2C screen retrace test bad

2D search for video ROM in progress (expansion ROM?)

2E screen running with video ROM

30 screen operable

30 screen running with video ROM

31 monoe monitor (40x25) operable

32 color monitor (40x25) operable

33 color monitor (80x25) operable

34 timer tick INT test in progress or bad

35 shutdown test in progress or bad

36 gate A20 bad

37 unexpected INT in protected mode

38 RAM test in progress or address bad >FFFFh

3A timer channel 2 test or bad

3B time-of day clock

3C serial prot test

3D parallel port

3E math-coprocessor test

41 system board select bad

42 extended CMOS RAM bad