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- Path: news.mindspring.com!usenet
- From: jjerrim@comminfo.com (John Jerrim)
- Newsgroups: comp.dcom.modems
- Subject: Re: Modem on COM4, Internal Port on COM2
- Date: Fri, 05 Apr 1996 13:48:11 GMT
- Organization: Computer Telecommunication Systems, Inc.
- Message-ID: <316520ba.171488947@news.atl.mindspring.com>
- References: <4k13e0$mpk@fcnews.fc.hp.com>
- Reply-To: jjerrim@comminfo.com
- NNTP-Posting-Host: jjerrim.mindspring.com
- X-Newsreader: Forte Agent .99d/32.182
-
- On Thu, 04 Apr 96 18:12:16 GMT,
- jim_southard@hp-ftcollins-om4.om.hp.com (Jim Southard) wrote:
-
-
- |My motherboard has built-in COM1/IRQ4 and COM2/IRQ3. COM2 is unused, COM1 is
- |my mouse. As far as I can tell (careful manual reading and visual search),
- |there is NO WAY to disable COM2. My system is a Zeos 486/66, and since they
- |got bought out by Micron I'm not crazy about trying to get tech support for
- |this motherboard (that's one path I still plan to take, however, to see if
- |there is a way to disable COM2). I have a sound card and CD-ROM drive,
- |limiting my available IRQ's and making it tough to change to another one (USR
- |will only work on 2, 3, 4, 5, or 7).
- |
- |I've been using the modem for some time with no apparent problems. My ISP
- |(Compuserve PPP) usually connects at 28.8, sometimes at 26.4. Transfer rates
- |using system monitor in Win 95 seem very irregular, however, with spurts to
- |2.7-3.0K cps (zipped files), but lots of gaps and stops. In short, my
- |average transfer rates seem slow, maybe closer to 1K cps.
- |
- |I've read in this newsgroup (and on USR's Web site) that modems MUST NOT be
- |put on COM4/IRQ3 if the motherboard has an enabled COM2/IRQ3, even if COM2 is
- |unused, but I've never heard anyone describe what happens if you do. I've also
- |heard rumors of problems with COM4 in general under Win95. I've generally
- |ignored these concerns since my modem is working.
- |
- |Now I'm wondering if my slow transfer rates may be a symptom of IRQ conflicts,
- |which could be corrected by changing to another IRQ or finding a way to
- |disable COM2.
-
- Jim,
-
- I've seen many cases like this - and sometimes it won't work at all.
- You should be able to disable the internal Com2 port in your CMOS
- setup program - if so, I'd suggest moving the USR over to Com2/IRQ3
- just to make things "standard".
-
-
- John Jerrim
- Computer Telecommunication Systems, Inc.
- Diagnostic & Installation Products for Modems & Serial Ports
-
- World Wide Web: http://www.comminfo.com
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