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AH = 22h AL = number of sectors to write CH = low byte of 12-bit cylinder number CL = starting sector (bits 0-5) and bits 8-9 of cylinder (bits 6-7) DH = head number (bits 0-5) and bits 10-11 of cylinder (bits 6-7) DL = drive number (80h,81h) ES:BX -> buffer containing data to be written
Return:
CF clear if successful CF set on error AH = status (see #00234 at AH=01h)
Desc: Write to the disk using the Multiple Block mode available on newer IDE drives and some hard disk controllers, which generates an interrupt only after the end of transferring a group of sectors rather than after each sector
Notes: Must call AH=24h"PS/1" before using this function. Input values in CL and DH are not range-checked. The byte at address 0040h:0074h is set to the status of the operation
See Also: AH=03h - AH=21h"PS/1" - AH=23h"PS/1" - AH=24h"PS/1"
Category: Disk I/O Enhancements - Int 13h - H
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