NEC Express5800/320Ma User Manual page 75

C9
Calculate an extended checksum.
CA
Check the serial key.
CB
Initialize the ROM and the RAM.
CC
Initialize serial video.
CD
Initialize ATA drives.
CE
Initialize light pen, if present.
CF
Test XBDA (Extended BIOS Data Area).
C005
Disable MTRR.
C006
Enable MTRR.
C007
Set CRC seed.
C008
Set the failure period.
C009
Adjust the memory size.
C00A
Reformat the CMOS.
C00C
Initialize the OEM type.
POST and Online Diagnostic Codes
POST Codes
A-13