Re: EMC Running My Controller

George

The limit of 5k is suggested on the EMC software page at . I suspect that
it has something to do with the rtlinux routine that does the work. Fred
Proctor at nist would know the correct answer and where in the install you
could look at the code that they run.


-----Origional Message-----
Date: Sun, 15 Aug 1999 21:50:32 -0700
From: George Potter <gpotter@...>
Subject: Re: EMC Running My Controller

>I don't know where the figure 5 Khz comes from, as the
>"normal" parallel port hardware (assuming based on that
>disclosed in the "original" IBM AT Handbook is only
>limited by how fast your software can write to it ....
>(up to the ISA I/O card bus speed). (I believe that
>even on "slow" machines it should be possible to get
>around 100 kbytes / second out the port. (The
>"newer" ECP (etc.) types of ports should support
>7 or 800 kbyte through put, if I remember correctly).
>(all of my support books are at work). The capacitors
>shouldn't be a limiting factor.

>If someone really needs to know, I can write a few lines
>of code, and see what I can get out of one (meaning
>hardware limits), but it will take a few days to get around
>to it.

>In a past life, I used the parallel port to run various production
>test hardware, and it was amazing what could be run that way.

>Regards,
>George Potter