Xref: utzoo sci.electronics:12883 comp.sys.ibm.pc:54094
Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!uwm.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!mjw06513
From: mjw06513@uxa.cso.uiuc.edu (Mary Winters)
Newsgroups: sci.electronics,comp.sys.ibm.pc
Subject: Re: Is PC parallel port latched?
Message-ID: <1990Jul15.014354.12657@ux1.cso.uiuc.edu>
Date: 15 Jul 90 01:43:54 GMT
References: <33965@ut-emx.UUCP>
Sender: usenet@ux1.cso.uiuc.edu (News)
Organization: University of Illinois at Urbana
Lines: 21

In article <33965@ut-emx.UUCP> ycy@walt.cc.utexas.edu (Joseph Yip) writes:
>Hi,
>
>I am trying to use IBM PC's parallel port (printer port) as digital
>output port. This will save me from buying a digital I/O card.
>The printer port is an 8-bit output. I do not know if the output is
>latched or not. This means that if I send a character to the printer
>port, will the 8-bit lines stay the same. I 
>am thinking of using the parallel port to control a stepper motor. 

I believe it is. I use a printer port to control various devices, including
VCRs and an IR controller. When you write a value to the output lines of the
printer port, the states of the output lines remain the same until you write 
a different value.




--
uv@f69.n233.z1.fidonet.org
Suffering from PMS (Presentation Manager Syndrome)