Function 44h I/O Control for Devices (IOCTL) Get or Set Device Informationentry AH 44h
AL 0Fh Set Logical Device (DOS 3.3+)
BL drive number: 0=default, 1=A:, 2=B:, etc.
BX file handle
CX number of bytes to read or write
DS:DX data or buffer
DX data
return AX number of bytes transferred
or error code (call function 59h for extended error codes)
or status 00h not ready
0FFh ready
CF set if error
file: /Techref/INT/21f/44sf/0f.htm, 0KB, , updated: 1999/4/26 12:35, local time: 2024/10/31 16:55,
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