We make use of dosemu for antenna control and use the IRQ-5 interrupt
line along with the timer-0 interrupts for our own software.
Our main reason for keeping with DOS is simplicity - we don't need to
change the working software or worry about device driver updates.
However, we were keen to move from Windows 95 to LINUX/dosemu due to the
great improvement in security (from none to good!) and networking.
We find the IRQ-5 hardware interrupt seems to get through pretty
reliably, but the timer-0 stuff can go AWOL for over 0.25 seconds at
times. We run dosemu with nice level -11 (to prioritise over the
X-server) and disable any cron jobs that could take away host time
significantly at regular intervals.
I don't know about the particular card you use, but the cases where we
used stepper motors the hardware controlled the stepping, and only the
reaching of set points or detecting of limit/reference positions relied
on rapid response from the software.
Maybe not much help, but just to share our experience.
Dr. Paul S. Crawford
Small's Wynd, Dundee,
DD1 4HN, U.K.
Tel: +44 (0)1382 38 4687
The University of Dundee is a Scottish Registered Charity, No. SC015096
To unsubscribe from this list: send the line "unsubscribe linux-msdos" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html