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From: mjw06513@uxa.cso.uiuc.edu (Mary Winters)
Newsgroups: comp.sys.ibm.pc
Subject: Re: INPUT PARALLEL DATA OVER THE PRINTER PORT?
Message-ID: <1990May30.152607.28229@ux1.cso.uiuc.edu>
Date: 30 May 90 15:26:07 GMT
References: <2010023@hpctdls.HP.COM> <12548@netcom.UUCP> <3260@galena2.UUCP>
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Organization: University of Illinois at Urbana
Lines: 24

In article <3260@galena2.UUCP> smithju@motcid.UUCP (Justin A. Smith) writes:
>I too am glad, i did not know it was dangerous.
>
>>Nevertheless, it *has* begun to catch on.  A number of recent products
>>make use of it, notably the latest version of Laplink, and a developer's
>>two-node version of LANtastic.
>
>Parallel input *IS* possible on all PC's. - BUT (here it comes) as has been
>stated you cant use the 8 outputs. 

That depends upon WHICH PC you have. PS/2s come equipped with bidirectional
parallel ports. It's possible some clone makers decided to add this feature, 
also. Other PCs can be modified to allow either input or output through the
8 data output lines, as the PIA chip is quite cabable of either but the PC's
designers chose to hardwire it for output only. This could be as simple as
cutting a trace on the circuit board and soldering a jumper wire between the
cut trace and +5V.




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