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- Path: fc.hp.com!southard-pc7027
- From: jim_southard@hp-ftcollins-om4.om.hp.com (Jim Southard)
- Newsgroups: comp.dcom.modems
- Subject: Modem on COM4, Internal Port on COM2
- Date: Thu, 04 Apr 96 18:12:16 GMT
- Organization: Hewlett-Packard Company
- Message-ID: <4k13e0$mpk@fcnews.fc.hp.com>
- Reply-To: jims@fc.hp.com
- NNTP-Posting-Host: pc7027.fc.hp.com
- X-Newsreader: News Xpress Version 1.0 Beta #4
-
- I have an internal modem on COM4/IRQ3 and an unused COM2/IRQ3 port still
- enabled on the motherboard. My modem is a USR 33.6, but I used the same
- configuration on an earlier Intel 14.4.
-
- 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.
-
- Any words of wisdom?
-
-
-
- Jim Southard
- jims@fc.hp.com
-