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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!stanford.edu!leland.Stanford.EDU!beale
- From: beale@leland.Stanford.EDU (John Beale)
- Subject: Help needed on serial printer interface
- Message-ID: <1992Sep14.050917.22101@leland.Stanford.EDU>
- Keywords: serial, printer, okidata, dot-matrix
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: DSG, Stanford University, CA 94305, USA
- Date: Mon, 14 Sep 92 05:09:17 GMT
- Lines: 21
-
- Apologies if this is the wrong group but: I thought it would be
- trivial to interface a serial printer to an IBM PC... it 'almost' works
- in a funny sort of way. The printer is an Okidata microline 82A (right;
- I got it cheap) and it has a DB-25 serial connector on the back. Using
- the COM2 serial port at 9600 baud, no parity, 8 bits, and sending the
- lowercase alphabet, it prints the following:
-
- ab@d@@gh@@k@mn@p@@s@uv@@yz and sent the uppercase alphabet,
-
- @@C@EF@@IJ@L@@O@QR@T@@WX@@ note the correspondences of @'s
-
- in the upper and lower case, so if I wanted to mix upper and lower, I could
- get the whole alphabet. If the '@' showed up every OTHER ascii character,
- I would guess it's a parity problem. I tried odd, even, mark, and space to
- no better result. The problem is exactly repeatable, so I assume is
- a coding problem rather than some cable capacitance problem or some such
- glitch. I would appreciate any suggestions emailed to:
-
- beale@sierra.stanford.edu
-
- Thank you for your time. - John Beale
-