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- Path: sparky!uunet!ogicse!uwm.edu!caen!mtu.edu!abcd.Houghton.MI.US!Jim_Johnson
- From: Jim_Johnson@abcd.Houghton.MI.US (Jim Johnson)
- Newsgroups: comp.sys.ibm.pc.hardware
- Subject: Re: Parallellport communications
- Message-ID: <Jim_Johnson.07ca@abcd.Houghton.MI.US>
- Date: 25 Aug 92 14:33:48 GMT
- Article-I.D.: abcd.Jim_Johnson.07ca
- Distribution: world
- Organization: Amiga BitSwap Central Dispatch
- Lines: 27
-
- In a message dated Mon 24 Aug 92 12:33, D9mikael@dtek.chalmers.se (mikael W
- wrote:
-
- DW> I would like to know how a cable for communication between two
- DW> parallellports
- DW> are wired. For something like Laplink or whatever, it doesn't
- DW> matter. I am
- DW> considering writing something like that for OS/2, and would like to
- DW> use the
- DW> same cables.
-
- DW> Mikael Wahlgren d9mikael@dtek.chalmers.se
-
- I don't have the full answer to your question, but I do know that there are
- two types of parallel ports - on the standard design, the data lines are
- only used for output, and there are only 4 status lines that can be used
- for input. In other words, each machine can send a full byte, but only
- receive nibbles. On the PS/2 machines and a growing number of clones
- (especially notebooks), the parallel port is bi-directional meaning the
- data lines can both send and receive a full byte at a time. I own a
- parallel port hard drive which I use to bring all my tools to a customer's
- site, so this distinction becomes important to me.
-
- -- Via DLG Pro v0.995
-
- Jim Johnson-
- *** Remember, they're only tools - Not a way of life! ***
-