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====== 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=[[en:docs:dos:api:int21:44:0d|440Dh]],INT 2F/AX=0802h,INT 2F/AX=122Bh,INT 2F/AX=14FFh, INT 2F/AX=1A01h

===== Note =====

Text based on [[http://www.cs.cmu.edu/~ralf/files.html|Ralf Brown Interrupt List Release 61]]

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