Initial cpu and instruction parsing

lib/cart.c

@@ -173,4 +173,15 @@ bool cart_load(char *cart) {
     }
     
     return true;
+}
+
+u8 cart_read(u16 address){
+    //for now ROM ONLY type supported...
+
+    return ctx.rom_data[address];
+}
+
+void cart_write(u16 address, u8 value){
+    
+    NO_IMPL
 }