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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!mcsun!sun4nl!dutrun!donau!hal.et.tudelft.nl!rene
- From: rene@hal.et.tudelft.nl (Rene Bodenstaff)
- Subject: Re: Parallel port as input port
- Message-ID: <1993Jan08.123526.10581@donau.et.tudelft.nl>
- Sender: news@donau.et.tudelft.nl (UseNet News System)
- Nntp-Posting-Host: hal.et.tudelft.nl
- Organization: Delft University of Technology, Dept. of Electrical Engineering
- References: <1993Jan8.055420.10172@nuscc.nus.sg>
- Date: Fri, 08 Jan 1993 12:35:26 GMT
- Lines: 28
-
- In article <1993Jan8.055420.10172@nuscc.nus.sg>, scip2060@nusunix1.nus.sg (SARDJONO INSANI) writes:
- > [ Article crossposted from comp.sys.ibm.pc.misc ]
- > [ Author was SARDJONO INSANI ]
- > [ Posted on Fri, 8 Jan 1993 05:49:52 GMT ]
- >
- >
- > Hi,
- > Is is possible to set the parallel port of PC as input port? Has
- > anybody tried this or know of other methods of transferring data
- > one byte at a time to the PC?
- >
- > Thanks
-
- Only a few days ago I spend some time reverse-engineering my
- old Hercules-printer card. I, just like you, wanted to know
- wether it would be possible to read data in via the parallel port.
- For my card, the answer is NO. There are only 8 data_out lines and
- some control signals available. However it is possible to read data
- in your computer via the parallel port: there are a few handshake
- signals that can be used for this purpose (like printer online/offline,
- etc.). If you really want to control your parallel port, you have to
- go all the way down to BIOS level. You need the following info then:
- DOS interrupts + the Centronics definitions + some info of your printer
- card (use voltmeter :-) ).
-
- Have fun.
-
- ---< Sonic says: "more haste is more speed" >---
-