From: cummings@tiger1.prime.com (Kevin J. Cummings) Subject: Re: How to run a second modem on COM3, IRQ5 Date: Thu, 3 Sep 1992 17:26:17 GMT
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).
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Kevin J. Cummings PrimeService
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Framingham, Mass. 500 Old Connecticut Path
Framingham, Mass.
Work: cummings@primerd.Prime.COM
Home: cummings@kjc386.framingham.ma.us
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I've come to the conclusion that your new
defense system SUCKS..." -- War Games
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