Path: utzoo!mnetor!uunet!husc6!uwvax!geowhiz!scott
From: scott@geowhiz.UUCP (Scott Kempf)
Newsgroups: comp.sys.apple
Subject: Re: Block moves
Message-ID: <768@geowhiz.UUCP>
Date: 18 Apr 88 20:10:45 GMT
References: <8804172225.aa09835@SMOKE.BRL.ARPA>
Reply-To: scott@geowhiz.UUCP (Scott Kempf)
Organization: University of Wisconsin, Department of Geology and Geophysics
Lines: 42

In article <8804172225.aa09835@SMOKE.BRL.ARPA> STEIN@UCONNVM.BITNET writes:
>Can someone give me an example using a block move (MVP or MVN)
>on the 65816?

>I know that you put the starting address (lower 16 bits) in X,
>destination address (lower 16 bits) in Y, the # of blocks less 1
>in the accumulator and then include the instruction

>mvp  sourcebank,destbank

>but I'm not certain how to put the source and destination banks in there.

The sourcebank and destbank the upper 8 bits of a 24 bit addresses of the
source and destination blocks.  (In the 65816 a bank is always 64K)

If you want to move HGR page1 onto page2 you would do (in "normal" memory):

LDX 2000
LDY 4000
LDA 1FFF
MVP 0,0

To copy page2 text the way Alternate Display Mode does (might do):

LDX 800
LDY 800
LDA 3FF
MVP 0,E1

					Scott

>ARPA:   stein%uconnvm.bitnet@mitvma.mit.edu        Alan H. Stein
>BITNET: STEIN@UCONNVM                          University of Connecticut
>UUCP:   ...ihnp4!psuvax1!UCONNVM.BITNET!STEIN        at Waterbury
>CompuServe: 71545,1500  Genie:  ah.stein       Department of Mathematics

_______________________________________________________________________________
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