https://wiki.forth-ev.de/ 2026-04-23T10:36:48+00:00 https://wiki.forth-ev.de/ https://wiki.forth-ev.de/lib/exe/fetch.php/wiki:logo.png text/html 2013-06-06T19:26:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.forth-ev.de/doku.php/en:playground:words:dup?rev=1370546804 dup simply duplicates the top of the stack. It's a code word. To see how F-PC v3.6 defines DUP, perform below steps. * Launch F-PC v3.6 (A famous DOS Forth) * Type in: „see dup“. FPC replies: DUP is Code, load DISASSEM to see it. ok * So I type in: text/html 2013-06-06T19:26:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.forth-ev.de/doku.php/en:playground:words:forth?rev=1370546804 ANSI Forth explanation of FORTH, it's good enough to me. text/html 2013-06-06T19:26:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.forth-ev.de/doku.php/en:playground:words:word_plus?rev=1370546804 * This word is very simple. For your curiosity, F-PC's definition for + is see + 6D0 5B W POP, 5B [ 6D1 58 AX POP, 58 X 6D2 1 W AX ADD, 01 D8 .X