--- gforth/engine/forth.h	2006/10/21 22:13:49	1.75
+++ gforth/engine/forth.h	2006/10/22 16:54:01	1.76
@@ -341,6 +341,10 @@ Cell capscompare(Char *c_addr1, UCell u1
 /* signal handler stuff */
 void install_signal_handlers(void);
 void throw(int code);
+/* throw codes */
+#define BALL_DIVZERO     -10
+#define BALL_RESULTRANGE -11
+
 typedef void Sigfunc(int);
 Sigfunc *bsd_signal(int signo, Sigfunc *func);