From: Groepaz (groepaz_at_gmx.net)
Date: 2003-10-08 23:20:01
On Wednesday 08 October 2003 21:19, Spiro Trikaliotis wrote:
> I think the maximum sourcing und sinking current of the parallel port is
> not really defined, as there are many different implementations of these
> beasts around.
it is infact well defined, but noone cares about it :=) guess why so many odd
problems with starcommander and alike :=P
i would advice your friend to use some simple ttl line drivers (theres some chip
with 8 drivers, dunno which... any other 74xxx gates will do aswell if you know
what you are doing :)). the line drivers will not only protect your lpt port, it
will also result in a better signal quality, especially if what you connect needs
(for todays measurements) a lot of current.
apart from that using 8bit epp style i/o with lpt is a bad idea IMHO, unless you
dont care much about if your program will run stable anywhere, anytime :)
gpz
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.