Int 13H Function 02H
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Description: Read Sector [PC] [AT] [PS/2]
Reads one or more sectors from disk into memory.
Input Output
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AH=02H If function successful
AL=number of sectors transferred Carry flag=clear
AL=number of sectors AH=00H
CH=cylinder AL=number of sectors
CL=sector transferred
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
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