Int 15H Function 21H Subfunction 01H
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Description: Write POST Error Log [PS/2]
Adds an entry to the power-on self-test (POST) error log.
Input Output
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AH=21H If function successful
AL=01H Carry flag=clear
BH=device identifier AH=00H
BL=device error code If function unsuccessful
Carry flag=set
AH=status
01H=error list full
80H=invalid command
86H=function not supported
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