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diff --git a/adoc/p_digits.adoc b/adoc/p_digits.adoc
index 3bbfdf4..4c3d8a1 100644
--- a/adoc/p_digits.adoc
+++ b/adoc/p_digits.adoc
@@ -1,9 +1,12 @@
+// stdio.asm:	WORD p_digits,'DIGITS',dovariable
+
 anchor:p_digits[]
 
-Word: DIGITS
-------------
+=== Word: DIGITS
 
-----
-stdio.asm:	WORD p_digits,'DIGITS',dovariable
-----
+....
+Data stack: ( -- a )
+....
 
+"DIGITS" is a variable word that holds the character array for mapping
+digit values to characters. It contains the 16 characters 0-9 and a-f.