standardized call-out blocks

[rrq/rrqforth.git] / adoc / p_2dup.adoc

diff --git a/adoc/p_2dup.adoc b/adoc/p_2dup.adoc
index 17c000554b060b20fa661e41c7ddb956c491e383..d42513172067365f795a946008e561e039f641a0 100644 (file)
--- a/adoc/p_2dup.adoc
+++ b/adoc/p_2dup.adoc
@@ -1,9 +1,19 @@
+// stack.asm:  WORD p_2dup, '2DUP',fasm
+
 anchor:p_2dup[]
 
-Word: 2DUP
-----------
+=== Word: 2DUP
+
+....
+Data stack: ( v1 v2 -- v1 v2 v1 v2 )
+....
 
-----
-stack.asm:     WORD p_2dup, '2DUP',fasm
-----
+"2DUP" is a function word that duplicates the top 2 cells on the data
+stack.
 
+====
+.Definition concept for 2DUP
+****
+( v1 v2 -- v1 v2 v1 v2 ) : 2DUP OVER OVER ;
+****
+====