>>I have checked the pulse, on the parallel port of an older PC
running win98, using a CNC program,

and the thing puts out a very nice 5volt square wave, it glitches once
in a while, I guess this is the noise spoken about, but it is doable to
do this in windows, or was....

then checking my simple program again using a delay, it was no
better, it seems that if you remove everything except the statement
which turns on the pin, it will change it from 0 to 5vdc, but something
turns the pin off again automatically, some windows feature or function.

So, like somebody said, it's back to the API or write another dll or
what ever,

If any of you know the solution to controling pins on the parallel port,
your help is appreciated.... <<



Which version of windows are you using? For any version of Win9x (including
Me) I haven't had any problems with manipulating the ports manually (I use
inline assembler to do it). For WinNT (including XP and 2K) you need a
driver to allow direct access to the port. Harder, slower, but doable. You
could always write your own driver if you really needed the speed, but
that's in the realm of "crazy talk" IMHO (writing drivers for windows is NOT
fun). TTYL

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads