🚀 go-pugleaf

> Forwarded article, from demon.ip.support.pc
> Path: ttelmah.demon.co.uk!news.demon.co.uk!dispatch.news.demon.net!demon!mail2news.demon.co.uk!porky.demon.co.uk
> From: jenny simmonds <jenny@porky.demon.co.uk>
> Newsgroups: demon.ip.support.pc
> Subject: serial card help
> Date: Mon, 22 Apr 96 16:00:50 GMT
> Organization: Myorganisation
> Lines: 9
> Message-ID: <830188850snz@porky.demon.co.uk>
> Reply-To: jenny@porky.demon.co.uk
> X-NNTP-Posting-Host: porky.demon.co.uk
> X-Newsreader: Demon Internet Simple News v1.30
> X-Mail2News-Path: porky.demon.co.uk
> 
> Help!  My 486sx25 has a uart 8250 chip which Demon
> says should be replaced with a 16550 buffered serial
> card.
> 
> Does anyone have the latter for sale?  How easy would it
> be to fit?  This machine is about four years old, BTW.
> 
> I'm using a 14,400 external USR modem.
> 
> 
It is possible, that if your card is an 'old' dual-serial/parallel card, it may
use a 'genuine' 8250 type chip. On such cards the chip for Com2, is often
socketed, and if this is the case, just the chip can be changed.
Otherwise, the card itself will have to be changed.
In either case, the job is really very easy, but in common with most such
things, it is only really easy, after seeing somebody else do it for the
first time!. The other problem, is that without looking at the card, it is
impossible to know, whether you just need a chip, card, or card with
IDE interface. Your machine, is just young enough, that the card may
have your disk interface on it as well!. The problem here, is that to
fit a Com1/Com2 card, with the existing card in place, requires knowing
which jumpers to change on the old card. Unless you have the jumpering
information for the old card, this may get difficult. The easiest alternative,
is probably just to add a buffered card, and get it jumpered, so that it
only has one port, set as Com4. A suitable card, will be available from
several companies, I glanced in a magazine, and 'Simply Computers',
list one for 19.00. This will come set as Com1/Com2, but jumpering
instructions will be included, and if the jumpers are set to disable the
second serial, and set the first port as Com4, this card can then be
added, and your software updated to use this higher port.
If you are doubtful, about removing the machines case, and adding
such a card, post where you are in the country, and there may be
a computer club, or an individual, who can help, in your area. Go over
to 'demon.tech.pc', and we can talk more there.

Best Wishes

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