Harold,

I can recommend a very good reference book regarding parallel=
 port I/O and
usage:

Jan Axelson's "Parallel Port Complete"
http://www.lvr.com/parprtib.htm

It covers virtually every type of parallel port used in PC's and=
 how to
identify and use them. It also has numerous exapmple programs and=
 circuits
included.

Jan's "Complete" book series covers parallel, serial and USB=
 ports. They are an
excellent starting place for using any of the common PC=
 interfaces and pull a
lot of details together in one place. I have all three books and=
 they are well
worth the money.

Matt Pobursky
Maximum Performance Systems

On Tue, 28 Aug 2001 08:37:35 -0700, Harold M Hallikainen wrote:
.. snip ...
>    Anyway, on printer ports... I've got a product I'm updating=
 and trying
>to get the printer port protocol as close to standard as=
 possible.
>Calling it thru BIOS seems like a good way of determining if I'm=
 close to
>standard. Using PIC PSP, I've got the "print to PIC" working=
 using busy
>after strobe handshaking (the strobe is tied to the PSP -WR=
 line, so it
>generates an interrupt at the trailing end of the strobe).
>    Many languages, under DOS, have a simple PRINT command (like=
 LPRINT in
>Basic) that send a sequence of bytes to the parallel port. I=
 recall under
>Win3.1 that there was a "simple text" printer driver that would=
 probably
>send stuff straight through without messing with it. I don't see=
 it in
>more recent versions of Windoze. Is there a "generic" printer=
 driver to
>just send ASCII out to the printer?
>
>Harold
>

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