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From: lgy@blake.acs.washington.edu (Laurence Yaffe)
Newsgroups: comp.sys.mips
Subject: Control-X on RC-2030 console
Message-ID: <3940@blake.acs.washington.edu>
Date: 6 Oct 89 16:56:38 GMT
Reply-To: lgy@newton.phys.washington.edu (Laurence Yaffe)
Organization: University of Washington, Seattle
Lines: 40


    The RC-2030 (i.e., a system w/o any display) that I received last week
has a strange problem which is preventing me from allowing the system console
(a.k.a. /dev/tty1) to be used for terminal access by normal users.  Typing a
Control-X (at any time) causes the appearance of the prompt:

    Enter cmd (help):

If you type "help", the following rather surprising menu appears:

    help	.......... display help screen
    r		.......... read iop memory
    R		.......... read R2000 memory
    mr		.......... read map register
    w		.......... write iop memory
    W		.......... write R2000 memory
    mw		.......... write map register
    set		.......... set/display variables
    echo	.......... display text
    i		.......... input from port
    o		.......... output from port
    loop	.......... repeat command (num or '~')
    F		.......... fill r2000 memory
    go		.......... set iop address
    FMA		.......... fill with addresses
    IMA		.......... fill with inverted addresses
    scsi	.......... dump scsi info

I have not experimented heavily with what can be done at this point - I doubt
that doing so is in the best interest of maintaining a healthy system.  This
behavior is not observed on /dev/tty0, on network logins, or on the console
display of an RS-2030.  This response to ^X occurs regardless of whether or
not you are logged in.  Not surprisingly, the response is not captured by the
'script' process.

Can anyone explain what's going on?  And, most importantly, how can this
screwball behavior be disabled?
-- 
Laurence G. Yaffe		Internet: lgy@newton.phys.washington.edu
University of Washington	  Bitnet: yaffe@uwaphast.bitnet