In message <199712251427.QAA10256@alpha.netvision.net.il>, Tovi
<toviber@NETVISION.NET.IL> writes
>hello!
>-------
>
>im trying to produce a sqr wave from the pc and to output it to the lpt1
>port
>i need to generate a variable frequency from 1 to 10000 herz
>how can i do it ???
>plese help me while this programs is very very importent to me
>
>
>tovi

Have a look on the Simtel archive for PCTIMER, this will give you the
accurate delays you need. The rest is quite easy.

Leon
--
Leon Heller: leon@lfheller.demon.co.uk http://www.lfheller.demon.co.uk
Amateur Radio Callsign G1HSM    Tel: +44 (0) 118 947 1424
See http://www.lfheller.demon.co.uk/dds.htm for details of my AD9850
DDS system - schematic and software.