function resets the fixed disk controller recalibrates attached drives moves the read/write arm to cylinder 0 prepares subsequent disk I/O INT 13H (0x13) Function 0DH (0x0D or 13) Reset fixed disk system 0EH (0x0E or 14) Read sector buffer

INT 13H (0x13)

Function 0DH (0x0D or 13) >> Reset fixed disk system

Call with:AH = 0DH
DL = drive
80H-FFH fixed disk

Returns:If function successful
Carry flag = clear
AH = 00H

If function unsuccessful
Carry flag = set
AH = status (see INT 13H Function 01H)

Comments:

This function resets the fixed disk controller, recalibrates attached drives, moves the read/write arm to cylinder 0, and prepares for subsequent disk I/O.

INT 13H (0x13)

Function 0EH (0x0E or 14) >> Read sector buffer

Call with:AH = 0EH
ES: BX = segment: offset of buffer

Returns:If function successful
Carry flag = clear

If function unsuccessful
Carry flag = set
AH = status

Comments:

This function transfers the contents of the internal sector buffer of the fixed disk adapter to the system memory. No data is read from the physical disk drive.

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