Re: second computer for DRO readout

[Paul <paul.corner-at-tesco.net>]

Hi Alex

In desktop computers, the ISA bus is virtually extinct - Industrial computers 
will still use it for several more years. A quick search for Single Board 
Computers will show just how many manufacturers are still committed to 
supporting the ISA bus !

If a network interface could guarantee a data packet at a pre-determined 
rate, EMC could probably be kludged to use it. But the data may take a second 
or more to arrive depending on the network load. A better solution might be 
to use the parallel port to communicate with your encoders as Jon has done 
with his ppmc hardware....

Idle thought - A PIC chip or three using D0-D7 as address lines, returning 
data on C0-C3 *might* just work... Or, figure out how to use the parallel 
port in bi-directional mode, and use an eight bit data bus.

Regards, Paul.


On Friday 20 Dec 2002 10:28 pm, alex wrote:
> What I don't like in an ISA card is the fact that ISA bus virtually
> disappeared by now.
> This šnetwork distributed architecture can help to go around of this
> limitation.
> I wonder how much precision will be lost for a slower update times -
> may be it work for a hobbyist?