From: richard AT stardate DOT bc DOT ca
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Detecting interrupt on printer port
Date: Mon, 17 Aug 1998 05:57:48 GMT
Organization: Rapidnet Technologies Internet
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To: djgpp AT delorie DOT com
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On Mon, 17 Aug 1998 01:19:54 GMT, "Michel Gallant"
<mgallant AT NOSPAM DOT grassroots DOT ns DOT ca> wrote:

>Hi!  I'm back, and with more problems than ever.  Below is the progam
>I'm using....  Incorporating all the suggestions (I think) made to me
>thus far regarding this program.  It still doesn't work.  I used a
>logic probe, and verified that Interrupt Request Line 07 

The problem may be that the interrupt is masked out in the PIC. 
Bit 7 (the most significant bit) of port 0x21 needs to be set to 1.