Callback symbols, VIP read/write

core/bus.c

@@ -80,6 +80,10 @@ static void busWriteBuffer(uint8_t *data, int type, int32_t value) {
 
 /***************************** Library Functions *****************************/
 
+/* Forward references */
+static void vipRead (VB *, uint32_t, int, int32_t *);
+static void vipWrite(VB *, uint32_t, int, int32_t, int);
+
 /* Read a typed value from the simulation bus */
 static void busRead(VB *sim, uint32_t address, int type, int32_t *value) {
 
@@ -89,7 +93,11 @@ static void busRead(VB *sim, uint32_t address, int type, int32_t *value) {
 
     /* Process by address range */
     switch (address >> 24) {
-        case 0: break; /* VIP */
+
+        case 0: /* VIP */
+            vipRead(sim, address, type, value);
+            break;
+
         case 1: break; /* VSU */
         case 2: break; /* Misc. I/O */
         case 3: break; /* Unmapped */
@@ -125,7 +133,11 @@ static void busWrite(VB*sim,uint32_t address,int type,int32_t value,int debug){
 
     /* Process by address range */
     switch (address >> 24) {
-        case 0: break; /* VIP */
+
+        case 0: /* VIP */
+            vipWrite(sim, address, type, value, debug);
+            break;
+
         case 1: break; /* VSU */
         case 2: break; /* Misc. I/O */
         case 3: break; /* Unmapped */