I have attached the link for where I bought my dual-port cards.
They are for ISA slots. Each port can be configured with its own IRQ.
They may have them for a PCI slot as well.
----- Original Message -----
From: "David A. Pruett" <firstname.lastname@example.org>
To: "Robert Pack (NX5M)" <email@example.com>; "Bill Feissner"
Sent: Sunday, December 12, 2004 9:11 PM
Subject: Re: [NA-User] 4 serial port card
> Bill, Bob, et al:
> I ran into the PCI/COM wall last fall when we were prepping for our VE1JF
> trip for the 2003 CQWW SSB. We were taking our own computers (to run NA)
> rather than running WrongLog which was on the host station's PCs. The
> computers were these cute little Acer P-200 desktops which I got at a
> computer show for $75 each with a 2 GB HDD, single COM, single LPT, a
> CD-ROM and 32 MB of RAM. The problem with small form factor PCs is
> expandability - there were only two slots - one a PCI and the other a
> Since this was a phone contest, the ISA slot was taken by a W9XT Contest
> Card. We needed two COMs on one computer (radio & network) and three on
> the other (radio, network, and packet). I found PCI single-COM cards at
> CompUSA which worked fine for the first computer after some
> to determine what the configuration program used as the default IRQ.
> For the other computer, I looked very hard for even a dual port PCI serial
> card which would work with NA. While I could find dual port PCI COM
> they all suffered from a common shortcoming: the two ports both shared a
> common interrupt request line (IRQ) and the COM port handlers in NA are
> designed to require separate IRQs for each port. CT has the same
> limitation. TRLog doesn't because it polls the COM ports and doesn't use
> IRQs; however for this reason it's limited to 4800 baud.
> Ultimately, for the 'JF trip what I did was rummage through my junk box of
> old cards and found an ISA card with two ports with settable IRQs.
> Unfortunately, I don't have a good answer for Bill right now. If your
> motherboard has two COMs on board, you can probably add a third COM with
> the commonly available single-COM PCI cards.
> At 02:32 PM 12/12/04 -0600, Robert Pack (NX5M) wrote:
> >If you have two you could just add another dual port card.
> >That is what I did with all my stuff.
> >Bob NX5M
> >----- Original Message -----
> >From: "Bill Feissner" <firstname.lastname@example.org>
> >To: <email@example.com>
> >Sent: Sunday, December 12, 2004 1:51 PM
> >Subject: [NA-User] 4 serial port card
> > > Hello all,
> > > Anyone have any ideas on where to get an inexpensive PCI 4 serial port
> > > card? If you already have 2 do you need to buy a 4 port card or just
> > > 2 port card to add to the 2 on the motherboard? I'm far from a
> > > wiz as you can see. Any thoughts and help appreciated.
> > > 73,s de AI3Q, Bill Feissner
> > >
> > >
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> > > NA-User@contesting.com
> > > http://lists.contesting.com/mailman/listinfo/na-user
> > > NA on the web: http://www.datomonline.com/
> > >
> > >
> > >
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