Table of Contents
Note: This API call is for DOS personality only. Use Family API for portability.
Int 21H, AH=44H, AL=0CH
Version
3.2 and higher
Brief
GENERIC CHARACTER DEVICE REQUEST
Family API
Input
AX = 440Ch BX = device handle CH = category code (see #01545) CL = function number (see #01546) DS:DX -> parameter block (see #01547,#01548,#01549,#01550,#01551,#01552) SI = parameter to pass to driver (European MS-DOS 4.0, OS/2 comp box) DI = parameter to pass to driver (European MS-DOS 4.0, OS/2 comp box)
Return
CF set on error AX = error code (see #01680 at AH=59h/BX=0000h) CF clear if successful DS:DX -> iteration count if CL=65h SI = returned value (European MS-DOS 4.0, OS/2 comp box) DI = returned value (European MS-DOS 4.0, OS/2 comp box)
Macro
Notes
DR DOS 3.41 and 5.0 return error code 16h on CL=45h,65h if the device does not support a retry counter
See also
AX=440Dh"DOS 3.2+",INT 2F/AX=0802h,INT 2F/AX=122Bh,INT 2F/AX=14FFh, INT 2F/AX=1A01h
Note
Text based on Ralf Brown Interrupt List Release 61