Jim,
Some parallel ports are open collector. Try pullup resistors to 5V.


Date:    Tue, 14 May 2002 09:07:29 -0700
From:    Jim <james3162@WORLDNET.ATT.NET>
Subject: Re: [PIC]:parallel port?   FPP programmer help

Well after pulling my hair out for a while I found that my parallel port put
out 3v for a high is this normal.
I'v been looking around the web at parallel port spec's nad didn't find
anything about voltages on the
parallel port so I am assuming that it's suppost to be 5v for a high. Can
anyone tell me if 3v is correct
for a high?.

Thanks
Jim
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