Path: utzoo!attcan!uunet!cs.utexas.edu!rice!rice!sun-spots-request
From: X17905%BBRBFU01.BITNET@cunyvm.cuny.edu
Newsgroups: comp.sys.sun
Subject: Changing MCP RS449 port to RS232 by jumper setting.
Keywords: Hardware
Message-ID: <1990Oct7.215622.22697@rice.edu>
Date: 7 Oct 90 21:30:00 GMT
Sender: sun-spots-request@rice.edu
Organization: Sun-Spots
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Approved: Sun-Spots@rice.edu
Originator: spots@walhalla.rice.edu
X-Sun-Spots-Digest: Volume 9, Issue 324, message 6

In Sun publication number 813-2032-05 (SunLink MCP Configuration
Procedures), on page 3, it reads:

Jumper settings:   J1501   Selects RS232 or RS449 for Port 0
                   J1502      "      "        "    "   "   1

Last week, we contacted our Sun representative to obtain the pinout on the
DB-37 connectors, if a change to RS232 is carried out. The reason for this
being that I need an extra RS232 port. Yes, I know, there are inexpensive
convertors on the market, but if I can get the same result by changing a
jumper setting...

The Sun representative replied that it was NOT possible to convert ports 0
and 1 to RS232, and that there was some error in the manuals.  True or not
? Maybe he misread something ; maybe WE misread something ?  All comments
welcome, by private mail or to SUN-SPOTS.

Eric Luyten,
Brussels Free University Computing Centre, Belgium.
EARN/BITNET/CREN: X17905@BBRBFU01