INT 2F CU - NETWORK REDIRECTOR - WRITE TO REMOTE FILE                           
	AX = 1109h
	ES:DI -> SFTsee System File Table
	    SFTsee System File Table DPBsee Drive Paramter Block field -> DPBsee Drive Paramter Block of drive containing file
	CX = number of bytes
	SS = DOS DS
	SDAsee Swappable Data Area DTAsee Disk Transfer Address field -> user buffer
Return: CF set on error
	    AX = DOS error code (see #01680 at INT 21/AH=59h/BX=0000h)
	CF clear if successful
	    CX = number of bytes written
	    SFTsee System File Table updated
Notes:	this function is called by the DOS 3.1+ kernel
	PrintCache v3.1 PCACHE.EXE intercepts this function for SFTs where
	  the Device DriverAn interface module between the device-independent portions of the operating system and an actual hardware device which converts device-independent requests into the actual sequence of device operations to perform the requested action.  IO.SYS contains the standard, built-in MSDOS device drivers such as CON, COM1, AUX, PRN, etc.  See also INT 21h Function 52h and INT 2Fh Function 0802h. Header field points at PCACHE, but does not
	  intercept any other network redirector functions
SeeAlso: AX=1107h,AX=1108h,INT 21/AH=40h,INT 21/AX=5D06h