Thread View: comp.sys.ibm.pc.hardware.misc
4 messages
4 total messages
Started by andy
Tue, 13 Feb 1996 00:00
Exploding COM ports!
Author: andy
Date: Tue, 13 Feb 1996 00:00
Date: Tue, 13 Feb 1996 00:00
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I few months ago I bought a modem to get 'online'. I bought a Motorola 28.8 External modem, and also bought a new IO card with 16550 UARTS so I could take full advantage of the speed of the modem. The 1st IO card I bought was just a cheap (�20) generic one. The COM port I was using for the modem gave up after just a couple of weeks. I then changed the swapped the com ports that the mouse and modem were using (the com port still functioning OK for the mouse). Soon after doing this the other com port gave up, so I could ot use the modem at all. After talking to the suppliers of the IO card they suggested a IO card with an on board BIOS may work better, so I bought a SIDE jr Pro for �40, this worked fine for about 4 months, and then the whole card gave up, IDE connections, COM ports and all. I thought this was just bad luck so decided to buy another IO card (with an on board BIOS) this being the Promise DC2300. Everything was fine again, for about a week!, then as before the com port with modem gave up, this time the mouse would not word in this com port, so I am now in the sitn with only 1 working com port (which means I cant use my mouse, when using the modem!), and I am not over confident about the other com port lasting too long given the past history. Has anybody any ideas as to why this has been happening???? The PC is a DX4/100, with VLB. The BIOS is Award, and I am running Win95. Please help!
Re: Exploding COM ports!
Author: John Davies
Date: Wed, 14 Feb 1996 00:00
Date: Wed, 14 Feb 1996 00:00
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In article <824247007.20830@mystiko.demon.co.uk>
andy@mystiko.demon.co.uk writes:
} I few months ago I bought a modem to get 'online'. I bought a
} Motorola 28.8 External modem, and also bought a new IO card with 16550
} UARTS so I could take full advantage of the speed of the modem.
Try reading Motorola's webpage. It's somewhere on there that the
early 28.8s had a problem with sending a surge of power back to
the serial port if you switched the modem off before the PC.
As Motorola have recognised this problem you may be lucky and
get them to compensate you for your losses?
I leave my Motorola 28.8 permanently switched on and power down the PC
and then switch the lot off at the wall - but I think I bought mine after
the fix anyway (I hope).
--
JOhn ____/\
\ o o |
=( @ )=
V
Exploding COM ports!
Author: Brian Logan
Date: Wed, 14 Feb 1996 00:00
Date: Wed, 14 Feb 1996 00:00
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andy@mystiko.demon.co.uk wrote: >I few months ago I bought a modem to get 'online'. I bought a >Motorola 28.8 External modem, and also bought a new IO card with 16550 I read a news item recently that said Motorola had recalled their early batches for just this reason. I'm sure your distributor will replace the modem. :-> -- Brian Logan
Re: Exploding COM ports!
Author: Stuart Brown
Date: Wed, 14 Feb 1996 00:00
Date: Wed, 14 Feb 1996 00:00
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In article <31213c77.76432@news.demon.co.uk>
blogan@g1ynf.demon.co.uk "Brian Logan" writes:
Q:> andy@mystiko.demon.co.uk wrote:
Q:>
Q:> >I few months ago I bought a modem to get 'online'. I bought a
Q:> >Motorola 28.8 External modem, and also bought a new IO card with 16550
Q:>
Q:> I read a news item recently that said Motorola had recalled their
Q:> early batches for just this reason. I'm sure your distributor will
Q:> replace the modem.
Sorry for the dumbass question...but what chipset does the Motorola
use ?
Is it Motorola or is it the Rockwell...just that I heard that the latter
had some problems and I've had a few with mine although after
re-configuring my modem settings things have improved.
S.
--
*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*+*
* +- stuart@sebmail.demon.co.uk -+ *
* Warping out of Reality at 28800 BPS *
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