diff --git a/gb/gb.c b/gb/gb.c
index a30edc6..1e41c78 100644
--- a/gb/gb.c
+++ b/gb/gb.c
@@ -10,6 +10,15 @@ bool gb_init(GB *gb, SDL_Renderer *renderer) {
 	gb->io->overlay = false;
 	gb->io->cachemode = false;
 	gb->io->p_cache = 0;
+	//initialize hram
+	if (!r_io_open_at (gb->io, "malloc://0x7f", R_PERM_RWX, 0, 0xff80)) {
+		goto fail_anal;
+	}
+	//initialize wram
+	RIODesc *wram = r_io_open_at (gb->io, "malloc://0x2000", R_PERM_RWX, 0, 0xc000);
+	if (!wram || !r_io_map_add (gb->io, wram->fd, R_PERM_RWX, 0, 0xe000, 0x1e00)) {
+		goto fail_anal;
+	}
 	gb->anal = r_anal_new ();
 	if (!gb->anal) {
 		goto fail_anal;
@@ -62,3 +71,5 @@ void gb_fini(GB *gb) {
 	r_io_free (gb->io);
 	gb[0] = (const GB){0};
 }
+
+//void gb_load_cartridge
diff --git a/io/ppu.c b/io/ppu.c
index 6dde818..b0f4d81 100644
--- a/io/ppu.c
+++ b/io/ppu.c
@@ -111,10 +111,18 @@ GBPPU *gb_ppu_open (RIO *io, SDL_Renderer *renderer) {
 		free (ppu);
 		return NULL;
 	}
+	RIOMap *vram = r_io_map_add (io, ppu->vram_fd, R_PERM_RWX, 0ULL, 0x8000, 0x2000);
+	if (!vram) {
+		r_io_fd_close (io, ppu->vram_fd);
+		free (ppu);
+		return NULL;
+	}
+	ppu->vram_mapid = vram->id;
 	char uri[64];
 	sprintf (uri, "gb_ppu://%p", ppu);
 	RIODesc *desc = r_io_desc_open_plugin (io, &r_io_plugin_gb_ppu, uri, R_PERM_RWX, 0);
-	if (!desc) {
+	if (!desc || !r_io_map_add (io, desc->fd, R_PERM_RWX, 0ULL, 0xff40, 0x6) ||
+		!r_io_map_add (io, desc->fd, R_PERM_RWX, 0x6, 0xff47, 0x5)) {
 		r_io_fd_close (io, ppu->vram_fd);
 		free (ppu);
 		return NULL;