INT 2A - NETBIOS, LANtastic - NETWORK PRINT-STREAM CONTROL

	AH = 06h
	AL = function
	    01h set concatenation mode
		all printer output put in one job until return to DOS prompt
	    02h set truncation mode (default)
		printer open/close or BIOS/DOS output switch starts new job
	    03h flush printer output and start new print job
Return: CF set on error
	    AX = error code
	CF clear if successful
Notes:	subfunction 03h is equivalent to Ctrl/Alt/keypad-*
	supported by PC LAN Program, LANtastic, NetWare, 10NET, etc.
	LANtastic v4.x no longer supports this call
	this function sets the printer mode for all redirected printers
SeeAlso: INT 21/AX=5D08h,INT 21/AX=5D09h,INT 2F/AX=1125h