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- Path: interramp.com!usenet
- From: us014811@interramp.com (Rich Bunevitch)
- Newsgroups: comp.dcom.modems
- Subject: Re: Modem on COM4, Internal Port on COM2
- Date: Sun, 07 Apr 1996 19:08:33 GMT
- Organization: PSI Public Usenet Link
- Message-ID: <4k97cm$b4j@usenet7.interramp.com>
- References: <4k13e0$mpk@fcnews.fc.hp.com>
- NNTP-Posting-Host: 38.12.1.197
- X-Newsreader: Forte Free Agent 1.0.82
-
- jim_southard@hp-ftcollins-om4.om.hp.com (Jim Southard) wrote:
-
- >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
- -snip-
- >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?
-
- The problem is that your ISP cannot send you data at a 28.8 KBPS rate
- for extended periods of time. There is nothing wrong with your
- computer, modem, or connection. Contrary to what you have read in this
- or other newsgroups (do not always believe what you read) it is
- perfectly OK to use COM4 for an internal modem if COM2 is unused. I
- used this setup until I bought an external modem and did not
- experience any problems. The reason no one says what will happen if
- you use this configuration is because nothing does happen. It works!
-
- BTW, if you have a Video card based on an S3 chip you can have an I/O
- port address (02E8) conflict with an internal modem.. If this is your
- case, switch your modem to COM3 and your mouse to COM2.
- ------------------------------
- Greetings from Bowie, MD !
- The Friches
- " ... Kicking around on a piece of ground
- in our home town ... " Pink Floyd
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