Created 7/21/2011 by Raymond Kawakami
IBM Thinkpad 600 BIOS IBET54WW POST/BIOS Version 1.49
Byte changes between defaults (BIOS Initialize), disabling IR and enabling IR, using PS2.exe
It has been confirmed that changing byte 22 from C9 to C8 will be enough to disable the IR port

0 1 2 3 4 5 6 7 8 9 A B C D E F
0 36 26 28 94 21 43 05 20 07 11 26 02 50 A4 00 00 Initialized in BIOS
47 26 42 94 21 43 05 20 07 11 26 02 50 A4 00 00 PS2 IR DISABLE command
00 26 52 94 21 43 05 20 07 11 26 02 50 A4 00 00 PS2 IR ENABLE command
10 40 00 00 00 03 80 02 FF FF 00 00 00 00 33 83 12 Initialized in BIOS
40 00 00 00 03 80 02 FF FF 00 00 00 00 33 83 12 PS2 IR DISABLE command
40 00 00 00 03 80 02 FF FF 00 00 00 00 33 83 12 PS2 IR ENABLE command
20 00 08 C9 39 FC 01 11 00 34 E1 03 80 FD 10 08 48 Initialized in BIOS
00 08 C8 39 FC 01 11 00 34 E1 03 80 FD 10 08 47 PS2 IR DISABLE command
00 08 C9 39 FC 01 11 00 34 E1 03 80 FD 10 08 48 PS2 IR ENABLE command
30 FF FF 20 86 FF B4 FD 10 00 00 00 00 00 00 00 00 Initialized in BIOS
FF FF 20 86 FF B4 FD 10 00 00 00 00 00 00 00 00 PS2 IR DISABLE command
FF FF 20 86 FF B4 FD 10 00 00 00 00 00 00 00 00 PS2 IR ENABLE command
40 17 88 00 01 00 03 08 04 00 08 70 40 00 FF FF FF Initialized in BIOS
17 88 00 01 00 03 08 04 00 08 70 40 00 FF FF FF PS2 IR DISABLE command
17 88 00 01 00 03 08 04 00 08 70 40 00 FF FF FF PS2 IR ENABLE command
50 00 02 50 14 0C 00 F0 14 0C 00 F0 14 14 00 FF FF Initialized in BIOS
00 02 50 14 0C 00 F0 14 0C 00 F0 14 14 00 FF FF PS2 IR DISABLE command
00 02 50 14 0C 00 F0 14 0C 00 F0 14 14 00 FF FF PS2 IR ENABLE command
60 FF 00 06 21 00 11 04 01 96 80 30 0E 00 00 04 9E Initialized in BIOS
FF 00 06 21 00 11 08 01 96 80 30 0E 00 00 04 9E PS2 IR DISABLE command
FF 00 06 21 00 11 04 01 96 80 30 0E 00 00 04 9E PS2 IR ENABLE command
70 00 06 FC 00 00 00 00 02 34 40 02 83 49 53 B2 00 Initialized in BIOS
02 06 FC 00 00 00 00 02 34 08 02 83 49 53 B2 00 PS2 IR DISABLE command
02 06 FC 00 00 00 00 02 34 08 02 83 49 53 B2 00 PS2 IR ENABLE command
IBM 600 Base 128 CMOS