collapseos/blk/634

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: _chk ( c --, check _sel range )
_sel C@ DUP 0x7f > IF 0x20 _sel C! THEN
0x20 < IF 0x7f _sel C! THEN ;
CREATE _ '0' C, ':' C, 'A' C, '[' C, 'a' C, 0xff C,
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: _nxtcls
_sel @ _ BEGIN ( c a ) C@+ 2 PICK > UNTIL ( c a )
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1- C@ NIP _sel !
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;