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Parallel port card - Schematics and J...

Trish's Escape from Hardware Hell Help Board » The Archive » Parallel port card - Schematics and Jumpers « Previous Next »

Author Message
Mike Resnick
Posted on Sunday, September 26, 1999 - 3:23 pm:   

I need to find info on a bunch of old parallel
port cards that I now need to instal.
The problems is a lot of them do not even have
jumpers , but just places to cut the built
in copper etchings that need to be soldered/shorted/opened. I need to
know how to set the I/O address and/or IRQ on these old boards.
I know that new cards are only $20 a piece but I haste wasting these old
cards when I know that they will suffice.

Please reply to

Thanks !
Posted on Sunday, September 26, 1999 - 3:23 pm:   

There are 4 input/ output address's but I only
remember the main 3 and they are "03BC-03BF" and
"0378-037F"/ usually "IRQ-7" for parallel port one.
With "0278-027F"/ "IRQ-5" for parallel port two..
Then the one not used for port one/ usually
"03BC-03BF", can be used as a port three.
And dont remember the #'s for port four.
The newer "BIO"s" support IRQ shareing, the
older one's didnt.
As a general rule you can share IRQ's as long as
there's no way that the different devices will
try to use the shared IRQ at the same time...
Posted on Sunday, September 26, 1999 - 3:23 pm:   

The way that's always worked for me has been set the irq to the same as your currant lpt port. Usually that's irq 7. The io address also depends on what your currant one is. Usually the one in the system is set to 378. If that is the case then these need to be at 278.
hope this helps

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