[WriteLog] serial interface PCI expansion boards

[Ron Stordahl]

Interesting.....this is surprising to me, I would have thought it would use
the UART in 5 bit mode.  The reason is that I would not think you could
trust the timing in a multitasking machine to to generate consistent data,
while the UART would do so by design...and it is also buffered for a few or
more characters on the send side too.  Keep in mind that systems that try to
generate CW by toggling DTR do a inconsistent job, and generatting rtty
would require even more precision (timing accuracy).

Are you sure about this Steve?  TXD is data from the UART, I don't think a
program can toggle it (could be wrong).  RTS on the other hand would be
under driver control, however W2K and XP might not allow a user task to do
this with the built in driver.  Speculation here Ill admit.

On the PK900, no, of course not, its standard 8 bit no parity on the serial
line.

Ron N5IN


----- Original Message -----
From: "Steve Dyer" <sdyer@interlogue.com>
To: "Ron Stordahl" <ronald.stordahl@mailhub.digikey.com>; <n2tk@arrl.net>;
"Writelog (E-mail)" <writelog@contesting.com>
Sent: Wednesday, July 10, 2002 12:25 PM
Subject: RE: [WriteLog] serial interface PCI expansion boards


> Direct FSK does not use 5 bit. MMTTY, WL, etc. toggle a single serial line
> (TXD or RTS) to generate FSK.
>
> I don't know if the PK900 actually communicates with the serial using 5
bit
> mode, but I would be very suprised. I assume all TNC's use standard ASCII
> characters in 8 bit mode. The MFJ unit I had did it this way.
>
> You are correct, don't get or use ISA. One additional point on ISA is the
> Plug and Play enumerator cannot probe ISA slots fully.
>
> Steve, W1SRD
>
> -----Original Message-----
> From: writelog-admin@contesting.com
> [mailto:writelog-admin@contesting.com]On Behalf Of Ron Stordahl
> Sent: Wednesday, July 10, 2002 7:22 AM
> To: n2tk@arrl.net; Writelog (E-mail)
> Subject: Re: [WriteLog] serial interface PCI expansion boards
>
>
> I have two of the Byterunner PCI-410HSP-9's.  They are PCI cards, use a
> single IRQ and have 4 serial and 1 parallel ports.  Just for a test I put
> both of them in a single PC so that I had a total of 10 COM ports (the
> mainboard has 2 of its own as is common) and 3 parallel ports (1 on the
> mainboard).  I tested all of the ports, they all worked.  I did not test
in
> 5 bit mode for direct FSK as I am not running soundcard fsk, rather I am
> using a PK900 for that.
>
> I did ask the guy at Byterunner this card supported 5 bit mode and he said
> it does....however I would test it myself before I believed it.
>
> The additional ports (8 coms and 2 parallel ports) use a single IRQ (=9).
>
> You might want to check  http://byterunner.com  and call their technical
> service line, you will probably talk with  'Sean' (he has answered every
> time I have phoned--could be a one man operaton) and put him on the spot
on
> the 5 bit issue.  Ask him to guarantee it will work or money back and test
> it yourself and let us know one way or the other.
>
> Ron N5IN
>
> PS--Don't buy ISA cards....they are dying!!!
>
>
>
> ----- Original Message -----
> From: "N2TK" <tony.kaz@verizon.net>
> To: "Writelog (E-mail)" <writelog@contesting.com>
> Sent: Wednesday, July 10, 2002 7:16 AM
> Subject: [WriteLog] serial interface PCI expansion boards
>
>
> > Time to add more serial ports. I just have the 2 that are on the
> > motherboard. Which one to buy? I see serial boards offered by Boca,
SIIG,
> > Lava, WinComm, Rocketport, etc. It seems they all use one IRQ. Is there
> any
> > problems with using one IRQ? If not, I can save a few IRQ's by
installing
> a
> > 4 port serial PCI card and disable the onboard serial ports. If
> performance
> > is better by using individual IRQ's, then I can get a 2 port serial card
> and
> > use these ports along with the 2 ports on the motherboard.
> > Is there a preferred PCI board(s) and/or ones to stay away from?
> > Tnx
> > Tony
> > N2TK
> >
> > _______________________________________________
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> >
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