Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site rlgvax.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!mhuxn!mhuxb!mhuxr!ulysses!allegra!mit-eddie!godot!harvard!seismo!rlgvax!guy From: guy@rlgvax.UUCP (Guy Harris) Newsgroups: net.micro.68k Subject: Re: strange instruction. Message-ID: <430@rlgvax.UUCP> Date: Wed, 6-Feb-85 22:55:35 EST Article-I.D.: rlgvax.430 Posted: Wed Feb 6 22:55:35 1985 Date-Received: Sat, 9-Feb-85 07:39:07 EST References: <26@cvl.UUCP> Distribution: net Organization: CCI Office Systems Group, Reston, VA Lines: 12 > Does anyone here *KNOW* what the 68K will do when confronted with the > following instruction? > > move.w (A4)+,(A4)+ For those of you with insatiable curiosity, it behaves in the "most straightforward" way - it picks up whatever A4 points to, bumps A4 by 2, drops the picked-up value at the location where A4 now points, and bumps A4 again. (Tested on a real live 68000) Guy Harris {seismo,ihnp4,allegra}!rlgvax!guy