home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!sun-barr!olivea!spool.mu.edu!wupost!zaphod.mps.ohio-state.edu!cis.ohio-state.edu!news.sei.cmu.edu!drycas.club.cc.cmu.edu!cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!andrew.cmu.edu!sm86+
- From: sm86+@andrew.cmu.edu (Stefan Monnier)
- Newsgroups: comp.sys.atari.st.tech
- Subject: Re: The ST parallel (printer) port
- Message-ID: <wegazVm00awJ43noQT@andrew.cmu.edu>
- Date: 12 Sep 92 22:32:01 GMT
- References: <BuGEEz.F0@world.std.com>
- Organization: Junior, Math/Computer Science, Carnegie Mellon, Pittsburgh, PA
- Lines: 41
- In-Reply-To: <BuGEEz.F0@world.std.com>
-
- Excerpts from netnews.comp.sys.atari.st.tech: 12-Sep-92 The ST parallel
- (printer) port michael g moncur@world.s (636)
-
- > send and receive data through the parallel port. Can anyone confirm that
- > the parallel port can be used as input? Someone once told me that the
- > PC's parallel port can do both input and output (which I know is true) but
- > the ST can't... And Abacus has been known to stretch the truth
- > occasionally. thoughts?
-
- > (I'm building an EPROM programmer that will be controlled by an ST
- > via the parallel port, and a "read" option would be nice...)
- >
- > Also, what would I use to read the printer port? An example in C would
- > be greatly appreciated.
- >
- > Michael Moncur
- > mgm@world.std.com (preferred)
- > sysop@only_bbs.via.mind.org (alternate)
-
-
- The parallel port is controlled by the Yamaha 'sound processor'
- (well, only the data pins). And this YSP permits use in both
- directions. I believe that on normal STs, the port isn't buffered
- so that you can use it as input !
-
- But you haven't much BIOS support: you have to write in YSP's
- registers (there may be an XBIOS call for that) directly !
- (doc on YSP registers shouldn't hard to find in atari books)
-
- Anyway, you also can get data input through the only input
- pin of the atari-parallel-port: busy (I think almost all
- EPROMMERS that a conected through centronics use this
- 'trick')
-
- Stefan Monnier
-
-
-
- -----------------------------------------------------
- -- On the average, people seem to be acting normal --
- -----------------------------------------------------
-