Message-ID: <333@hou5g.UUCP>
Date: Wed, 1-Feb-84 16:12:40 EST
Article-I.D.: hou5g.333
Posted: Wed Feb  1 16:12:40 1984
Date-Received: Tue, 7-Feb-84 10:50:57 EST
Organization: AT&T Information Systems Laboratories, Holmdel, NJ
Lines: 32


	1) Proportional printing can only be done by one of two methods.

	  a. The printer has a 'proportional print mode' - such as a Diablo.
		The printer needs to know which print wheel is attched, and
		advances the head according to the size of the printed
		character

	  b. If your printer has 'graphics' resolution, that is you can control
		the absolute positioning of the paper to within 1/100 of an
		inch.  This will require a software 'filter' for all printed
		files that would tell the printer..."print this char" and the
		"move to THIS location"

	  If your printer does not have the hardware capabilities to control
	it's head and paper to such fine degrees, you can NOT have proportional
	print.   NOTE: Proportional print is NOT a function of a printwheel.  It
	is a function of the hardware capabilities of the PRINTER!!!


	2) Bidirectional printing can ONLY be done in one of two methods/

	  a. The printer has the hardware to handle bidirectional printing.
		(see 1.a. above)

	  b. The printer has the hardware capabilities to address a particular
		column (see 1.b. above)

	Bidirectional printing is NOT a function of software.  It must
	be handled by HARDWARE.  

			(** FRODO **)