Merge pull request #1361 from RobLoach/memory

libretro: Update the memory data slots

src/system/libretro/tic80_libretro.c

@@ -844,26 +844,44 @@ RETRO_API bool retro_unserialize(const void *data, size_t size)
 }
 
 /**
- * libretro callback; Gets region of memory. Used for achievement tracking.
+ * libretro callback; Gets region of memory.
+ * 
+ * https://github.com/nesbox/TIC-80/wiki/ram
  */
 RETRO_API void *retro_get_memory_data(unsigned id)
 {
-	if (state == NULL || state->tic == NULL || id >= TIC_PERSISTENT_SIZE) {
+	if (state == NULL || state->tic == NULL) {
 		return NULL;
 	}
 
-	// TODO: Have the memory data refer to the RAM rather than persistent data.
-	// https://github.com/nesbox/TIC-80/wiki/RAM
 	tic80_local* tic80 = (tic80_local*)state->tic;
-	return &(tic80->memory->ram.persistent.data[id]);
+	switch (id) {
+		case RETRO_MEMORY_SAVE_RAM:
+			return tic80->memory->ram.persistent.data;
+		case RETRO_MEMORY_SYSTEM_RAM:
+			return tic80->memory->ram.data;
+		case RETRO_MEMORY_VIDEO_RAM:
+			return tic80->memory->ram.vram.data;
+		default:
+			return NULL;
+	}
 }
 
 /**
- * libretro callback; Gets the size of memory. Used for achievement tracking.
+ * libretro callback; Gets the size of the given memory slot.
  */
 RETRO_API size_t retro_get_memory_size(unsigned id)
 {
-	return sizeof(u32);
+	switch (id) {
+		case RETRO_MEMORY_SAVE_RAM:
+			return TIC_PERSISTENT_SIZE;
+		case RETRO_MEMORY_SYSTEM_RAM:
+			return TIC_RAM_SIZE;
+		case RETRO_MEMORY_VIDEO_RAM:
+			return TIC_VRAM_SIZE;
+		default:
+			return 0;
+	}
 }
 
 /**