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
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