Implement SAVE-INPUT and RESTORE-INPUT

[pforth] / fth / system.fth

diff --git a/fth/system.fth b/fth/system.fth
index c33f40b..5e7aff0 100644 (file)
--- a/fth/system.fth
+++ b/fth/system.fth
@@ -360,6 +360,10 @@
         2* swap
 ;
 
         2* swap
 ;
 

+: D= ( xd1 xd2 -- flag )
+       rot = -rot = and
+;
+

 \ define some useful constants ------------------------------
 1 0= constant FALSE
 0 0= constant TRUE
 \ define some useful constants ------------------------------
 1 0= constant FALSE
 0 0= constant TRUE