collapseos/blk/434

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: _sdc! ( srcaddr blkno -- )
(spie) 0x58 ( CMD24 ) 0 ROT ( a cmd 0 blkno ) _cmd
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IF _err THEN
_idle DROP 0xfe (spix) DROP
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0 SWAP ( crc a )
512 0 DO ( crc a )
C@+ ( crc a+1 n )
ROT OVER ( a n crc n )
_crc16 ( a n crc )
SWAP ( a crc n )
(spix) DROP ( a crc )
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SWAP ( crc a )
LOOP
DROP ( crc ) 256 /MOD ( lsb msb )
(spix) DROP (spix) DROP
_wait DROP (spid) ;