Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!gem.mps.ohio-state.edu!apple!mips!mohan
From: mohan@mips.COM (Ram Mohan Vedula)
Newsgroups: comp.sys.mips
Subject: Re: Control-X on RC-2030 console
Message-ID: <29301@abbott.mips.COM>
Date: 11 Oct 89 18:26:52 GMT
References: <3940@blake.acs.washington.edu> <1989Oct7.190837.12240@sobmips.UUCP>
Reply-To: mohan@mips.COM (Ram Mohan Vedula)
Organization: MIPS Computer Systems, Sunnyvale, CA
Lines: 48

In article <1989Oct7.190837.12240@sobmips.UUCP> roe@sobmips.UUCP (r.peterson) writes:
>From article <3940@blake.acs.washington.edu>, by lgy@blake.acs.washington.edu (Laurence Yaffe):
>> 
>>     The RC-2030 (i.e., a system w/o any display) [ ... ]
>>     Control-X (at any time) [on /dev/tty1] causes:
>> 
>>     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
>> 
>
>The R[CS]2030 have an I/O processor whose RS232 I/O is performed over
>tty1.  This is why, for example, the power-on diagnostic test output
>is directed to tty1, not 0 - most of the tests run in the IOP.
>
>So, you are talking the the debug monitor code in the IOP itself.  Any
>you are correct - messing about here is a good way to crash machines.
>
>A quick look around does not show how to shut this off - I'll look around
>and see what I can find.
>-- 
>					Roe Peterson
>					{attcan,mcgill-vision,telly}!sobeco!roe

Press 'RETURN' to get out of the IOP menu.
-- 
Mohan Vedula
MIPS Computer Systems, Inc.                    {ames,decwrl,pyramid}!mips!mohan
750 Arques Ave.                                mohan@mips.com
Sunnyvale, CA  94086 (408) 720-2946