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From: rubini@ipvvis.unipv.it (Alessandro Rubini)
Newsgroups: comp.misc,comp.sources.wanted,comp.sys.ibm.pc.misc
Subject: Re: Reading from the parallel port
Message-ID: <rubini.678110403@ipvvis>
Date: 28 Jun 91 12:00:03 GMT
References: <389@bibsyst.UUCP>
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Organization: Universita' di Pavia - Italy
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               ingar@bibsyst.UUCP (ingar) writes:

>Hi, I need to know if it is possible to read 8 bits from the 
>centronics parallel port on an ibm compatible PC. I know it is
>possible to read 3 bits, and I have even heard it is possible to
>read 5, but is it possible to read 8 bits, and if it is 
>possible how is it done??

Actually, it is possible to read five bits into the parallel port,
   but nothing more (I also would like too, and studied a schematics
   of the circuit).
The fact is that the parallel port of the PC has born to drive a printer
   only. The 25pin connector deserves some 8 pins to GND. It'd have been better
   to mark 7 of them 'reserved', for future uses like this one.
-- 
==============================================================================
 Alessandro Rubini                                     Almo Collegio Borromeo
                   rubini@ipvvis.unipv.it              27100 Pavia, Italy.
==============================================================================