collapseos/blk/046

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Parameter Stack
DROP a --
DUP a -- a a
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?DUP DUP if a is nonzero
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NIP a b -- b
OVER a b -- a b a
ROT a b c -- b c a
SWAP a b -- b a
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TUCK a b -- b a b
2DROP a a --
2DUP a b -- a b a b
2OVER a b c d -- a b c d a b
2SWAP a b c d -- c d a b
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'S Returns current stack pointer, not counting the
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push it's making right now. (cont.)