IRQ's in OS/2

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2 total messages Started by Thomas K. Otake Sun, 13 Sep 1992 21:57

#506

Author: Thomas K. Otake
Date: Sun, 13 Sep 1992 21:57

6 lines
723 bytes

I am trying to set the IRQ's for COM ports in OS/2 applications or the system
in general but haven't found out how, yet.  Does anybody know how this is
done?

Tom,
totake@buster.eng.ua.edu

Re: IRQ's in OS/2

#509

Author: Doug Azzarito
Date: Tue, 15 Sep 1992 20:52

18 lines
1397 bytes

In article <1992Sep13.215737.144359@ua1ix.ua.edu> totake@ho19.eng.ua.edu (Thomas K. Otake) writes:
>I am trying to set the IRQ's for COM ports in OS/2 applications or the system
>in general but haven't found out how, yet.  Does anybody know how this is
>done?

In general, IRQ's are fixed in OS/2.  The exception is COM.SYS.  In your
CONFIG.SYS, you can specify parameters to COM.SYS as follows:

DEVICE=\OS2\COM.SYS (p,bbbb,i) (p,bbbb,i)

   where p = port number (1 for COM1, 2 for COM2, etc)
         bbbb = base port address (in hex). 03F8 for COM1, 02F8 for COM2, etc.
         i = irq for this port (4 for COM1, 3 for COM2, etc).

The only time you have to specify these are if they deviate from standard.
The replacement COM.SYS (available from friendly FTP sites everywhere) has
additional parameters you can set to control buffering and timeouts.  They're
described in the COM package.

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