X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=ROM2%2Fchime.h;h=88e8b151407a1c2709737b0178af85215bb71901;hb=27fb8a023fa0572ef4171624781460bc59537d49;hp=7cc7fa7a900147583d8680661612d15fe1abefc1;hpb=9366107abfbfbe85f00b27449c79284d0e1aa59e;p=uccvend-snackrom.git

diff --git a/ROM2/chime.h b/ROM2/chime.h
index 7cc7fa7..88e8b15 100644
--- a/ROM2/chime.h
+++ b/ROM2/chime.h
@@ -2,12 +2,19 @@
 #define _CHIME_H_
 
 #include "types.h"
+#include "vend.h"
 
-#define CHIME_TIME 10 /* number of RTI interrupts to have the chimer on */
+#define CHIME_TIME 5 /* number of RTIs to have the chime on (6.6ms each) */
 
-extern u8 chime_count;
+extern volatile u8 chime_count;
 
-void chime();
+/* outside world interface */
 extern inline void chime_start() { chime_count = CHIME_TIME; }
 
+void chime(); /* RTI interrupt */
+
+/* internal helpers, also could be called from outside world */
+extern inline void chime_on() { bset((void*)&_io_ports[M6811_PORTA], PORTA_CHIME); }
+extern inline void chime_off() { bclr((void*)&_io_ports[M6811_PORTA], PORTA_CHIME);}
+
 #endif /* _CHIME_H_ */