🚀 go-pugleaf

ochealth@unixg.ubc.ca (ochealth) writes:

 > I have a program I'd like to write, and I want to know if it can be
 > done:
 > I need to write to a port every 10-30 us or so (smaller is better)
 > worst case. Writes to the port may not be necessary every time.
 > Is there a good way to generate a timing signal that would wake up
 > a thread, so it could perform the write? Keep in mind the 20
 > microsecond or so needed between every signal. It should be fairly
 > accurate, but the exact value doesn't matter much.

Given that you're talking about 40,000 interrupts per second, it would
simply not be possible.  OS/2 is rated at 1,000 interrupts per second.
I've been able to get up to about 12,000 per second on a 486DX-25, but
that's with a dedicated system doing no useful work, and it's still
far short of your requirements.

Best regards,
John