portio.d

Name{number}
	portio - AdvanceCAB Hardware Port Input/Output For DOS

Synopsis
	:portio lpt?
	:portio ADDRESS_HEX
	:portio lpt? VALUE_HEX
	:portio ADDRESS_HEX VALUE_HEX

Description
	The `portio' utility can be used to drive the parallel port
	or any other hardware device which use the PC ports.

	If a lpt ports (lpt1,lpt2,lpt3) or an hexadecimal address is
	specified the port is read and the read value is printed on
	the screen.

	If also a value is specified the port is written with the
	specified value.

	All the address and all the values are in the hexadecimal
	format.

	The address of the lpt ports are detected using the BIOS
	informations at the memory address 408h.

Examples
	Set all the parallel port data bits:

		:portio lpt1 ff

	Clear all the parallel port data bits:

		:portio lpt1 0

	Set all bit on the port 80h
	
		:portio 80 ff

	Set all the parallel port data bits in the config.sys:

		:device=c:\mame\portio.exe lpt1 ff

Copyright
	This file is Copyright (C) 2003 Andrea Mazzoleni.