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- Path: sparky!uunet!darwin.sura.net!jvnc.net!rutgers!micro-heart-of-gold.mit.edu!bu.edu!dartvax!coos.dartmouth.edu!crow
- From: crow@coos.dartmouth.edu (Preston F. Crow)
- Newsgroups: comp.sys.atari.8bit
- Subject: Re: SIO port protocol
- Message-ID: <1992Jul28.041342.27241@dartvax.dartmouth.edu>
- Date: 28 Jul 92 04:13:42 GMT
- References: <Jim_Johnson.05wz@abcd.Houghton.MI.US>
- Sender: news@dartvax.dartmouth.edu (The News Manager)
- Organization: Dartmouth College, Hanover, NH
- Lines: 20
-
- In <Jim_Johnson.05wz@abcd.Houghton.MI.US> Jim_Johnson@abcd.Houghton.MI.US (Jim Johnson) writes:
-
- >I assume you are talking about building a RS-232 serial port and a
- >Centronics compatible parallel port for your 8bit directly from the SIO
- >port. Sorry to say, but you will be major money ahead to buy something
- >like the P:R: Connection. The SIO port doesn't have the correct voltages
- >or data lines to simply assemble a cable with a SIO connector on one end
- >and a RS-232 connector on the other end.
-
- >Going from a RS-232 line to a SIO device (as in the ST-Xformer) is another
- >story. It is much easier to drop from RS-232 12volt signals to SIO 5volt
- >signals, AND not too much more than the data lines and software polling
- >signals are needed to send/receive from SIO devices.
-
- It amy be a bit different, but the SIO2PC hardware device does allow 2-way
- communication with a RS-232 port. If you're building something that deals
- with RS-232 and SIO, I suggest you look at the hardware specifications for
- SIO2PC available at the archive site.
-
- --PC
-