At 03:08 AM 12/10/96 -0500, you wrote:
>In a message dated 96-12-09 12:03:43 EST, Norm writes:
>
><< [SNIP] I am working on a design using soemthing similar.
>
>I've been using the RS-485 protocol for this.  For the PICs it works great!!
> But---using Visual Basic for Windows, my PC end is problematic as far as
>timing goes.  I encounter very variable delays - up to 250 msec.) in getting
>the PC to respond to the bus.  Have you found a good technique for getting a
>narrower time window?

I haven't gotten to that point yet.  250 msec sounds very long.  Have you
tried other languages other than VB?  It's been awhile since I did any VB
programming and never did serial comms.  I will be using Visual C++ for the
PC end of the network I'll let you know what delay I end up with.

Norm