// stack.asm: WORD p_2dup, '2DUP',fasm anchor:p_2dup[] === Word: 2DUP .... Data stack: ( v1 v2 -- v1 v2 v1 v2 ) .... "2DUP" is a function word that duplicates the top 2 cells on the data stack. ==== .Word: 2DUP [caption='Definition concept {counter:exec}: '] ---- : 2DUP OVER OVER ; ---- ====