Category: <b>DOS kernel</b>
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<pre><b>INT 21 - DOS 2+ - IOCTL - READ FROM CHARACTER DEVICE CONTROL CHANNEL</b>

	AX = 4402h
	BX = file handle referencing character device
	CX = number of bytes to read
	DS:DX -&gt; buffer
Return: CF clear if successful
	    AX = number of bytes actually read
	CF set on error
	    AX = error code (01h,05h,06h,0Dh) (see <a href=../../it/80/16.html>#01680</a> at AH=59h/BX=0000h)
Notes:	format of data is driver-specific
	  (also see separate entries below for some specific cases)
	this function was not supported by Digital Research's DOS Plus
SeeAlso: AX=4400h,AX=4403h"DOS",AX=4404h"DOS",INT 2F/AX=122Bh
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