Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!usc!apple!portal!sv!daven
From: daven@svc.portal.com
Newsgroups: comp.sys.mac.comm
Subject: Re: Mapping Delete Key on IBM Mainframe
Message-ID: <1990Dec11.181425.24773@svc.portal.com>
Date: 11 Dec 90 18:14:25 GMT
References: <90341.123833DMANN@auvm.auvm.edu>
Organization: Software Ventures
Lines: 28

In article <90341.123833DMANN@auvm.auvm.edu> DMANN@auvm.auvm.edu (Daniel Manning) writes:
>
>     I have been unable to get my Delete Key to work when telecommunicating
>with our mainframe.  We have an IBM 3090 VM/XA with a 7171 Protocol.  The
>mainframe is suppose to be expecting a DEL (ascii 127) code.
>
>     My suspiscion is that the keyboard is emitting the ascii 127 but
>that it is being trapped by either the Macintosh itself or the communication
>program (MacKermit and Red Rider) and not being transmitted.
>
>When I tried it, the mainframe deleted the whole line instead of just the
>character at the cursor.

I don't have the answer, but maybe some questions that will help.

a) What emulation does the 7171 expect you to be in? (It's usually VT100)
b) Is the 7171 a programmable device? (i.e. can the char sequences it expects
   to see be changed?) If it is, has someone programmed into it some oddball
   expectations for DEL and perhaps other keys?
c) How are you connecting to the 7171? Perhaps some ancient piece of comm
   equipment is swallowing your DEL or changing it.


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