Re: Port LPT + ADA

[Adrien Plisson <aplisson-news@stochastique.net>]

Dennis Lee Bieber wrote:
> 	As I recall, the ports are available under W9x, but not under
> the WinNT (includes XP) series.
> 
> 	Under WinNT, you pretty much need a system level driver designed
> to give such low-level access.

at a higher level you might try opening a file named "LPT1"...

using the CreateFile function passing "LPT1" as the file name, 
OPEN_EXISTING as dwCreationDisposition, and... well let's quote the MSDN:

Communications Resources
The CreateFile function can create a handle to a communications 
resource, such as the serial port COM1. For communications resources, 
the dwCreationDisposition parameter must be OPEN_EXISTING, and the 
hTemplate parameter must be NULL. Read, write, or read/write access can 
be specified, and the handle can be opened for overlapped I/O. For more 
information about communications, see Communications.

this is from the msdn library documentation for function CreateFile, 
available at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/base/createfile.asp

the communications chapter is available at:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devio/base/communications_resources.asp

now, RTHM (with H as Huge), try, and come back to ask any (eventually 
Ada related) question if needed...

-- 
rien