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From: hal@cornell.UUCP (Hal Perkins)
Newsgroups: net.unix-wizards
Subject: Re: clear core
Message-ID: <80@cornell.UUCP>
Date: Thu, 14-Feb-85 18:56:37 EST
Article-I.D.: cornell.80
Posted: Thu Feb 14 18:56:37 1985
Date-Received: Fri, 15-Feb-85 06:03:25 EST
References: <8256@brl-tgr.ARPA>
Reply-To: hal@gvax.UUCP (Hal Perkins)
Organization: Cornell Univ. CS Dept.
Lines: 16
Summary: 

>> Now, who remembers the one-instruction core clear?
>
>mov	-(pc),-(pc)	; .word	014747

Ok, you got the easy one.  Now here's the harder version of the
question.  Write a PDP-11 assembly language program that will set ALL
of memory and all of the registers (except, possibly, for PC) to the
value ZERO.

I'll post an answer in a week or two if nobody gets it.

(Yes, there are at least two solutions to this.)


Hal Perkins                         UUCP: {decvax|vax135|...}!cornell!hal
Cornell Computer Science            ARPA: hal@cornell  BITNET: hal@crnlcs