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- Newsgroups: comp.os.linux
- Path: sparky!uunet!gatech!darwin.sura.net!jvnc.net!primerd.prime.com!tiger1.prime.com!cummings
- From: cummings@tiger1.prime.com (Kevin J. Cummings)
- Subject: Re: How to run a second modem on COM3, IRQ5
- Message-ID: <1992Sep3.132617@tiger1.prime.com>
- Sender: usenet@primerd.prime.com (Usenet)
- Organization: Prime Computer, Inc.
- References: <1992Sep2.202602.18765@magnus.acs.ohio-state.edu> <u31b3hs.715505811@cip-s02>
- Date: Thu, 3 Sep 1992 17:26:17 GMT
- Lines: 44
-
- In article <u31b3hs.715505811@cip-s02>, u31b3hs@cip-s02.informatik.rwth-aachen.de (Michael Haardt) writes:
- > bjones@magnus.acs.ohio-state.edu (William A Jones) writes:
- > >I just obatined a Gateway Telepath modem from a coworker who decided that he
- > >didn't want it anymore. So, now I have two high speed modems. But, after
- > >reading the documentation, I discovered that the Telepath can be configured
- > >to use any of the 4 COM ports as IRQ5. So, what I was hoping to do is
- > >keep my current installation (Microsoft Mouse on COM1, IRQ4; modem on
- > >COM2, IRQ3) and run the Gateway on COM3 (or COM4) using IRQ5. Is this
- > >possible? If so, what changes (I'm sure there are some) would I need to
- > >make to the kernel? What else would I have to do to get this to happen?
- >
- > I use a usual serial card aat COM3 with IRQ 5 without any problems. I
- > changed only the interrupt number in the table, somwhere in the kernel
- > sources (serial.c?) Anyway, that is all you need to do.
- >
- > It might be a nice idea to see which device uses which port addresses
- > and IRQs during boot, having kind of a unique format like:
- >
- > ttys? at 0x??? using irq ?
- >
- > Btw: I can't find any more free interrupts in the range from 0 to 7,
- > are there any? Using interrupts from the second irq controller would
- > mean that I have to solder something :(
-
- And solder it to something in the 16-bit bus connector to boot! Anyone got
- a CHEAP "16-bit" IO card (I'm talking < US$50 for two serial ports!)? I got
- a single port similar to what I want with my Mouse Systems "bus mouse"
- interface card. It's a single serial port configurable as COM1-COM4 (or two
- other non-standard serial port addresses) and IRQs 2, 3, 4, 5, 7, 11, 12, 13,
- or 15. It requires a 16 bit slot in order to use IRQs above 7. It should
- also do 16 bit IO address decode (not 12 bit like the 8-bit XT cards do).
-
- =================================================================
- Kevin J. Cummings PrimeService
- 20 Briarwood Road A Computervision Company
- Framingham, Mass. 500 Old Connecticut Path
- Framingham, Mass.
- Work: cummings@primerd.Prime.COM
- Home: cummings@kjc386.framingham.ma.us
-
- Std. Disclaimer: "Mr. McKittrick, after careful consideration,
- I've come to the conclusion that your new
- defense system SUCKS..." -- War Games
- =================================================================
-