devel snapshot

1 files changed, 11 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index e69eb77..c97aab3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -91,8 +91,19 @@ int main(int argc, char *argv[])
 
     while(!quit)
     {
+	Z80State s1,s2;
+
+	Z80GetState(z80,&s1);
 	Z80SingleStep(z80);
 
+	Z80GetState(z80,&s2);
+
+	if (s2.PC>0x3fff)
+	{
+	    printf("PC > 0x3fff - from 0x%4.4x\n",s1.PC);
+	    return 0;
+	}
+
 	if (trace)
 	{
 	    DisplayState(z80);