for those wondering how the OBC in a IR code comes about here is how it works

OBC value is based on the 3rd byte then if
obc0 = 00
obc1 = 80
obc2 = 40
obc3 = c0
obc4 = 20
obc5 = A0

The bit order is reversed.

OBC0 = 00h 00000000b reversed = 00000000b 00h
OBC1 = 01h 00000001b reversed = 10000000b 80h
OBC2 = 02h 00000010b reversed = 01000000b 40h
...
OBC5 = 05h 00000101b reversed = 10100000b A0h
...
OBC32 = 20h 00100000b reversed = 00000100b 04h
etc.

regards