From owner-freebsd-current  Wed Oct 28 18:09:32 1998
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From: Kevin Day <toasty@home.dragondata.com>
Message-Id: <199810290209.UAA13367@home.dragondata.com>
Subject: Re: Mod to doscmd's port.c to directly access parallel ports
In-Reply-To: <199810290057.QAA20847@pinhead.parag.codegen.com> from Parag Patel at "Oct 28, 98 04:57:31 pm"
To: parag@cgt.com (Parag Patel)
Date: Wed, 28 Oct 1998 20:09:23 -0600 (CST)
Cc: current@FreeBSD.ORG, tjm@codegen.com, eric@needhams.com
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> 
> I just acquired a Needhams EMP-10 EPROM programmer and wanted to run it 
> directly under FreeBSD 3.0-CURRENT.
> 
> So I modified doscmd's port.c to let me run the Needham DOS software 
> which wants direct access to a parallel port.  I needed the following 
> patch to let me access the real I/O ports from the emulator to get to 
> the parallel port.
> 
> With this patch, I can run "doscmd -x -b -i0x378:8 -o0x378:8" as root, 
> connect up the EMP-10, and the Needhams software directly accesses the 
> parallel port from the DOS emulator window.  Nice!
> 
> Would someone who knows this stuff better than me (not difficult) check 
> the mod for me, and if it's sane, please check it in?  Thanks!
> 
> 
> 	-- Parag
> 

I ended up using something similar to run the EMP-10 on freebsd, but be
careful. the device is extremely sensitive to timings. (especially when
programming EPROMs... flash isn't so bad).

Either nice it to -20, or diddle with rtprio. :)

Kevin

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