INT 4D - TI Professional PCIBM PC - DISK - VERIFY DISK SECTOR(S) AH = 06h 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 because an actual comparison with disk data is performed, not just the CRC check of the standard PCIBM PC BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware. The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. or INT 4D/AH=04h SeeAlso: AH=00h,AH=01h,AH=02h,AH=04h,INT 13/AH=04h