[TRLog] Freeing up IRQ's and some good info on Universal
Fri, 17 Jul 1998 09:42:20 PDT
Great information, but I have just a couple little things that might
>First my good buddy Jay WS7I pointed out ....
>"Turn off the IRQ to LPT's Dave. Printer port's aren't bi-directional
>so IRQ's aren't needed. Usually in BIOS setup you can disable the
This isn't entirely true. In the old days, LPT ports were not
bi-directional. However, most BIOS programs now let you make them
bi-directional, for a few reasons. First, remember the Zip drive?
Because it both reads and writes, it needs a bi-directional port, and
therefore an IRQ. That applies to all devices like that. Second, some
printers have features (like my HP Deskjet 692) that require a
bi-directional LPT port/IRQ. My printer does stuff like aligning the
cartridges, cleaning, and stuff like that via the port, not by pressing
a button on the printer itself.
>I was able to turn of the IRQ on LPT2 which is on a card. The bios and
>wont let me turn off the IRQ on LPT1 which is on the mother board. I
>probably disable the mother board LPT and go to a card and then turn
>IRQ for that one as well. At any rate freeing up IRQ 05 from LPT2 has
>allowed me to install the sound card, my first goal. The 2nd radio and
>months away anyway.
Again, what do you have running on LPT1? W98 might not be letting you
if you have something running on LPT1 that is using the bi-directional
Thanks for the USB information, that was quite useful. I even have 2
USB ports that came with my computer (an HP 266 MHz).
David Jones, KK7GW
Trustee for the Juanita Contesting Club-KD7BWU
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