One more tip: If there is any chance of more than 5v having contact
with parallel port (from fault etc) it is best to use a card-based
parallel port rather than an onboard. It's better to blow a card than a
motherboard.  If you have any ISA slots you can use an ISA IO card
which were common on 286, 386 and older 486 systems (just set jumpers
for disable HDD, FDD and to set Parallel port to LPT2 - best to choose
one which has jumper settings printed on it).  Otherwise PCI parallel
card.

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