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PostPosted: Fri Sep 17, 2010 12:57 pm 
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Joined: Thu Sep 16, 2010 10:59 pm
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Location: philippines
MOVE.B #1,PBDR
MOVE.B PBDR,D1
ANDI.B #$80,D1



sir pls help . i cant understand the andi.b command. kindly explain

thanks.

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em min ni mi


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PostPosted: Fri Sep 17, 2010 7:43 pm 
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Joined: Thu Dec 16, 2004 6:42 pm
Posts: 1102
ANDI.B #$80,D1

Does a binary AND of the hex number $80 and the lower byte of register D1.

$80 & D1

or in binary

10000000 & D1

The result is stored in D1.B

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Prof. Kelly


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