Int 4D/AH=04h

TI Professional PC - DISK - VERIFY DISK SECTOR CRC(S)

AH = 04h
AL = number of sectors to verify (must be nonzero)
CH = low eight bits of cylinder number
CL = sector number 1-63 (bits 0-5)
high two bits of cylinder (bits 6-7, hard disk only)
DH = head number
DL = drive number (bit 7 set for hard disk)
ES:BX -> data buffer

Return:
CF set on error
if AH = 11h (corrected ECC error), AL = burst length
CF clear if successful
AH = status (see #00234 at INT 13/AH=01h)
AL = number of sectors transferred
ES:BX -> buffer for last sector processed (including one with errors)

Note: Even though no data is transferred, ES:BX must still be valid

See Also: AH=00h - AH=01h - AH=02h - AH=06h - Category: Bios - Int 4Dh - T

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