--- gforth/extend.fs	1996/02/13 11:12:17	1.16
+++ gforth/extend.fs	1997/01/04 16:32:28	1.19
@@ -30,7 +30,7 @@ decimal
 
 \ VALUE 2>R 2R> 2R@                                     17may93jaw
 
-: value ( w -- ) \ core-ext
+: value ( w "name" -- ) \ core-ext
   (constant) , ;
 \ !! 2value
 
@@ -39,9 +39,6 @@ decimal
 
 ' drop alias d>s ( d -- n ) \ double		d_to_s
 
-: dabs ( d1 -- d2 ) \ double
-    dup 0< IF dnegate THEN ;
-
 : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash
     >r s>d >r abs -rot
     s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
@@ -81,8 +78,7 @@ decimal
 \ UNUSED                                                17may93jaw
 
 : unused ( -- u ) \ core-ext
-    s0 @ 512 -        \ for stack
-    here - ;
+    forthstart dup 3 cells + @ + here - ;
 
 \ [COMPILE]                                             17may93jaw
 
@@ -97,7 +93,7 @@ decimal
 \ CONVERT                                               17may93jaw
 
 : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
-    \ obsolescent; supersedet by @code{>number}.
+    \ obsolescent; superseded by @code{>number}.
     true >number drop ;
 
 \ ERASE                                                 17may93jaw
@@ -125,12 +121,6 @@ decimal
     REPEAT
     2drop 2drop  rdrop false ;
 
-\ ROLL                                                  17may93jaw
-
-: roll  ( x0 x1 .. xn n -- x1 .. xn x0 ) \ core-ext
-  dup 1+ pick >r
-  cells sp@ cell+ dup cell+ rot move drop r> ;
-
 \ SOURCE-ID SAVE-INPUT RESTORE-INPUT                    11jun93jaw
 
 : source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d
@@ -204,6 +194,6 @@ variable span ( -- a-addr ) \ core-ext
 	key decode ( maxlen span c-addr pos2 flag )
 	>r 2over = r> or
     UNTIL
-    type-rest drop
-    2drop nip span ! ;
+    2 pick swap /string type
+    nip span ! ;