Int 13H Function 04H
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Description: Verify Sector [PC] [AT] [PS/2]
Verifies the address fields of one or more sectors. No data is
transferred to or from memory by this operation.
Input Output
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AH=04H If function successful
AL=number of sectors Carry flag=clear
CH=cylinder AH=00H
CL=sector AL=number of sectors verified
DH=head If function unsuccessful
DL=drive Carry flag=set
00H-7FH floppy disk AH=status
80H-FFH fixed disk (see Int 13H Function 01H)
ES:BX=segment:offset of buffer
(see Notes)
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