Western Digital T13/2132-D - Manual (Page 43)

June 23, 2010 T13/2132-D Revision 3
Working Draft Enhanced Disk Drive - 4 (EDD-4) 31
8.3 Get Status of Last Operation (FN 01h)
This function shall be used to return the status of the last INT 13h command executed.
Entry
AH 01h
DL BIOS device number
Exit
Carry Clear The Get Status of Last Operation function was successful
AH Shall be cleared to zero
AL shall be set to the status of the last INT 13h operation
Carry Set The Get Status of Last Operation function completed with an error
AH Shall be set to the error code