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From: ujmurphy@KING.MCS.DREXEL.EDU (Jim Murphy)
Newsgroups: comp.sys.apple2
Subject: Re: sideaffect of MVN/MVP instruction
Message-ID: <9105300228.AA00543@mcs.drexel.edu>
Date: 30 May 91 02:28:22 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 15

albert recently asked:

>someone want to explain to me why the MVN/MVP instructions don't restore
>the data bank register? (yes, i'm moving data in different banks).

     Well, because they don't. The instruction set reference plainly states
that the data bank register holds the destination bank value when these
instructions are finished. If you'd look at the detailed instruction operation
listing in the '816 data sheet, you can see it there too. Is a PHB/PLB sequence
too difficult?

Jim Murphy                             "I know that you believe you understand
Internet:  ujmurphy@mcs.drexel.edu     what you think I said. But I am not sure
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