Another printing question

[Jonathan Simpson]

Is there any way to catch the output sent to LPT1
(from a dos program) using a TSR in powerbasic? Is this even
possible. Those who know me probabaly know why I want to, but
bascially I need to redirect output to a file when a printer is
not available.

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Jonathan Simpson

[Lance Edmonds]

As long as the DOS app prints via an interrupt (and not by performing direct port I/O), it can generally be done with a ISR (interrupt service routine). While you can write the ISR install and uninstall code with PowerBASIC, you cannot write the actual ISR code in a high-level language that uses run-time functions. Instead, the ISR routine itself must be written in raw assembly code.

However, instead of reinventing the wheel, search the net for "PRN2FILE" and try using that utility. Note that PRN2LPT is over 10 years old, and may or may not work under all versions of Windows. You'll have to try it and see if it will work for you.

Last time I looked, it was freely available on the SimTel web site.


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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Paul Purvis]

i have a few programs not written by myself you maybe interested in
also it seems that one program runs ok but only on slower processors
send your email to redbonei AT excite WITH A DOT com and i will send some to you
they are all freeware and run under msdos622
paul

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[This message has been edited by paul d purvis (edited March 01, 2007).]

[Jonathan Simpson]

Well, on the upside, it doesn't really need to work in windows... I already have a program for that.

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Jonathan Simpson