*BSD News Article 9685


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From: pbd@runyon.cim.cdc.com (Paul Dokas)
Newsgroups: comp.unix.bsd
Subject: XFree86 mouse problems solved
Message-ID: <51150@shamash.cdc.com>
Date: 8 Jan 93 21:32:52 GMT
Sender: usenet@shamash.cdc.com
Organization: ICEM Systems, Inc.
Lines: 27

The problems that I was having with X turned out to be in the hardware.
The serial ports on my IDE-IO (ide, fd, 2s 1p 1g) card are useless (no
surprise here :-| )

So I'm now down to 2 serial ports (a mouse and a terminal), but I need
3 (I've got a modem).  I've got a simple dual serial card (a 16450 and
a 16550 on board), but I'm considering getting another.  But I've got
a few questions first.  Does anyone know if the default com driver will
handle shared IRQs for serial ports?  For example, will the following
work:

  device         com1    at isa? port "IO_COM1" tty irq 4 vector comintr
  device         com2    at isa? port "IO_COM2" tty irq 3 vector comintr
  device         com3    at isa? port 0x3e8 tty irq 4 vector comintr
  device         com4    at isa? port 0x2e8 tty irq 3 vector comintr

com1 and com3 share IRQ 4 and com2 and com4 share IRQ 3.  Where com1
and com2 are on one board and com3 and com4 are on another.

If this won't work, then can someone recommend a multi-port serial
card.

-- 
#include <std.disclaimer>
#define FULL_NAME                          "Paul Dokas"
#define EMAIL                              "pbd@runyon.cim.cdc.com"
/*            Just remember, you *WILL* die someday.             */