Marshall:

Take a look at my code in this source file download link. This stuff was written in Borland BC 3.1 for use under either DOS or a standalone PC implementation. It speeds up the PC timer interrupt to a 1000 Hz rate (1 mSec) and then performs various activities. Note that this code does not call through to the original timer interrupt handler and so if you have other DOS TSR programs OR if you want the floppy drive motor to turn off at floppy access OR if you want the DOS in memory clock to stay up to date then you would have to deal with that.

POLLTIME.ZIP


Hope that helps
Michael Karas