calls, jumps, and stack.

lib/cpu_fetch.c

@@ -17,6 +17,7 @@ void fetch_data() {
             return;
         case AM_R_R:
             ctx.fetched_data = cpu_read_reg(ctx.cur_inst->reg_2);
+            return;
         case AM_R_D8:
             ctx.fetched_data = bus_read(ctx.regs.pc);
             emu_cycles(1);