In article 450@uwm.edu, pegasus@csd4.csd.uwm.edu (David R Hucke) writes:
>Hi everybody! Got another question.
>
>First of all I wish to thank everybody who has given me help in the past.
>Especially Tony Hefner who has been the most help. I really appreciate
>the help guys (gals).
>
>
>I wish to build a circuit that sends a parallel byte every 125 us (is that
>milliseconds?) to a parallel port.
>
>I would like the byte to be incremented by a counter so that I can verify
>that I am getting the bytes correctly.
>
>The purpose of this circuit is to test the speed of a PC's parallel port.
>
>Any suggestions?
To save you time and effert, the PC's parallel port works at about 1MHz. The reason I say "about" is that not all mother boards produce exactly 1MHZ. They may differ by maybe +/- 10% thus .9 to 1.1 MHZ. But basically they run close to the 1MHz standard.
