emulator uses a bus now in the cpu, ROM, RAM and VIA (7-seg) are devices connected to the bus

1 files changed, 28 insertions, 0 deletions

diff --git a/emu/bus.h b/emu/bus.h
new file mode 100644
index 0000000..baa2fe2
--- /dev/null
+++ b/emu/bus.h
@@ -0,0 +1,28 @@
+#ifndef BUS_H
+#define BUS_H
+
+#include "device.h"
+
+enum {
+	MAX_NOF_DEVICES = 5
+};
+
+typedef struct registered_device_t {
+	device_t *device;
+	uint16_t from;
+	uint16_t to;
+} registered_device_t;
+
+typedef struct bus_t {
+	device_t base;
+	int nof_devices;
+	registered_device_t devices[MAX_NOF_DEVICES];
+} bus_t;
+
+void bus_init( bus_t *bus );
+void bus_register( bus_t *bus, device_t *device, uint16_t from, uint16_t to );
+uint8_t bus_read( void *obj, uint16_t addr );
+void bus_write( void *obj, uint16_t addr, uint8_t data );
+void bus_deinit( void *obj );
+
+#endif