handle dbra wait loops, update cyclone

cpu/musashi/m68kcpu.c

@@ -832,6 +832,8 @@ int m68k_execute(int num_cycles)
 			m68ki_exception_if_trace(); /* auto-disable (see m68kcpu.h) */
 
 			m68ki_trace_t1(); /* notaz */
+
+			m68ki_cpu_p->not_polling = 1;
 		} // while(GET_CYCLES() > 0); // notaz
 
 		/* set previous PC to current PC for the next entry into the loop */

cpu/musashi/m68kcpu.h

@@ -919,6 +919,7 @@ typedef struct
 
 	// notaz
 	sint cyc_remaining_cycles;
+	sint not_polling;
 } m68ki_cpu_core;
 
 // notaz