collapseos/blk/434

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2020-04-27 21:22:06 -04:00
: MOVE ( a1 a2 u -- )
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( u ) 0 DO
SWAP DUP I + C@ ( a2 a1 x )
ROT SWAP OVER I + ( a1 a2 x a2 )
C! ( a1 a2 )
LOOP
2DROP
;
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: DELW 1- 0 SWAP C! ;
: PREV 3 - DUP @ - ;