1 files changed, 2 insertions, 0 deletions
diff --git a/opcode.h b/opcode.h
index 757850e..f634be3 100644
--- a/opcode.h
+++ b/opcode.h
@@ -86,6 +86,8 @@
 #define BRK 0xF8 /* BReaK. */
 #define STP 0xFF /* SToP. */
 
+enum {ALU, THREAD, BRANCH, FLAG, MEMORY, MISC};
+
 static const char *opname[0x100] = {
 	OPNAME(CPS),
 	OPNAME(ADC),