Using COM3 under SCO XENIX
Dr. Srodawa
srodawa at vela.acs.oakland.edu
Tue Sep 25 12:05:04 AEST 1990
In article <1990Sep24.191042.724 at d.cs.okstate.edu> klarich at d.cs.okstate.edu (KLARICH TERRY JAME) writes:
>
>
>I am currently using 4 ports under xenix 2.3.2. Everything works as it
>should. However, the catch is that you must use an irq line for each port.
>My ports are using 2, 3, 4 and 5. I have an article which says the CORRECT
>procedure to make this work. I don't remember who wrote it.
>
No one has mentioned the obvious solution. Use an n-way card. These
generally are designed to use only one IRQ and have only a single interrupt
status register. I have a generic 4-way card purchased from a large west
coast mailorder house. The card wasn't very expensive, and it can be
configured either as 4 Ms_DOS type devices, or as a Xenix device. By
Xenix, they mean what I just decscribed. The card works with the standard
Xenix asynch driver without a hitch. I wouldn't even consider playing around
with 4 ports in the MS-DOS way of doing things. Ron.
--
| Ronald J. Srodawa | Internet: srodawa at unix.secs.oakland.edu |
| School of Engineering and CS | UUCP: srodawa at egrunix.UUCP |
| Oakland University | Voice: (313) 370-2247 |
| Rochester, Michigan 48309-4401 | |
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