working on debug menu

include/cpu.h

@@ -33,6 +33,7 @@ typedef struct {
     bool enabling_ime;
     u8 ie_register;
     u8 int_flags;
+    u16 inst_pc;
 } cpu_context;
 
 typedef struct {
@@ -42,6 +43,8 @@ typedef struct {
 void cpu_save_state(cpu_state*);
 void cpu_load_state(const cpu_state*);
 
+void fetch_instruction(cpu_context *ctx);
+
 void cpu_init();
 bool cpu_step();