Int 13/AH=43h

IBM/MS INT 13 Extensions - EXTENDED WRITE

AH = 43h
AL = write flags
---v1.0,2.0---
bit 0:
Verify write
bits 7-1 reserved (0)
---v2.1+ ---
00h,01h write without verify
02h write with verify.
DL = drive number.
DS:SI -> disk address packet (see #00272)

Return:
CF clear if successful
AH = 00h
CF set on error
AH = error code (see #00234)
disk address packet's block count field set to number of blocks
successfully transferred

Note: The BIOS returns CF set/AH=01h (invalid function) if verify is requested but not supported

See Also: AH=03h - AH=41h"INT 13 Ext" - AH=42h"INT 13 Ext" - AH=44h

Category: Disk I/O Enhancements - Int 13h - I

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