Read/Write to Paralel port

Get the component from this page:

http://www.geocities.com/CapeCanaveral/9646/compoent.htm

With componet, there isn't any there that alows the read and write from/to the paralel port

_LR_

it's possible to use the standard file functions to read/write the parallel port

use

CreateFile( 'LPT1:',GENERIC_READ + GENERIC_WRITE,
           0 , nil, OPEN_EXISTING, 0 + FILE_FLAG_WRITE_THROUGH, 0 );

to open a file handle, after that you can use the ReadFile() and WriteFile() functions

good luck

If you need to access the port on NT then you may need this freeware
that gives you access http://www.internals.com/utilities/winio.zip  I have
a unit to make it easier to use... just let me know if you need that :-)

or

http://www.wideman-one.com/gw/tech/Delphi/iopm/index.htm

+ some good texts at that site for io programming.
:-)

Hi inthe :-)

  That is a GREAT link!

gwena - it's absolutely the wrong way to use such a driver for accesing the parallel port on NT/W2K!
NT/W2K have two standard drivers for both the seriell and the parallel ports which can be accessed in the described way. So if you use another driver, then two drivers accessing the same hardware - not a very good idea.
Such I/O drivers are only good for non standard hardware, which have no NT/W2K drivers.

if someone is interested in german resources look here:

http://www.nt-treiberentwicklung.de/kapitel5.htm


good luck

"  without using asm(in/out)  "

strange answer you accepted there ...