cmp bug fix.

diff --git a/emulator/6502core.c b/emulator/6502core.c
index 4a3eb1e..521a703 100644 (file)
--- a/emulator/6502core.c
+++ b/emulator/6502core.c
@@ -832,7 +832,7 @@ static void set_negative(unsigned char data) {
 }
 
 static void set_CMP_carry(unsigned char data, unsigned char cmp) {
-    if (data - cmp >= 0)
+    if (data >= cmp)
         cpu_reg.status.carry = 1;
     else
         cpu_reg.status.carry = 0;