From: fabian AT cs DOT uct DOT ac DOT za (Fabian Nunez)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Detecting interrupt on printer port
Date: 18 Aug 1998 07:23:33 GMT
Organization: University of Cape Town
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Message-ID: <6rba5l$b9v$1@groa.uct.ac.za>
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In <35d7c57b DOT 36585684 AT news DOT rapidnet DOT net> richard AT stardate DOT bc DOT ca writes:

>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. 

??? Are you sure about that?  I'm pretty sure that '1' on port 21h
means "mask out this IRQ"... (although I'm in the lab at uni, and my
inter57 is sitting several K's away at home)

CHeers
Fabian
--
Fabian Nunez, MSc student     Collaborative Visual Computing Laboratory,
fabian AT cs DOT uct DOT ac DOT za           University of Cape Town

"Ram Disk" is NOT an installation procedure!