1 files changed, 27 insertions, 0 deletions
diff --git a/mapper_000b.c b/mapper_000b.c
new file mode 100644
index 0000000..9252060
--- /dev/null
+++ b/mapper_000b.c
@@ -0,0 +1,27 @@
+
+
+static void mapper_000b_init(struct nes_state *state) {
+	state->map.m000b.prg_ptr = state->prg_rom;
+	state->map.m000b.chr_ptr = state->chr_rom;
+}
+
+static uint8_t mapper_000b_prg_read(struct nes_state *state, uint32_t addr) {
+	if(addr >= 0x8000) {
+		return state->map.m000b.prg_ptr[addr - 0x8000];
+	}
+	return 0;
+}
+
+static void mapper_000b_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+	if(addr >= 0x8000) {
+		state->map.m000b.prg_ptr = state->prg_rom + ((value >> 4) & 7) * 0x8000;
+		state->map.m000b.chr_ptr = state->chr_rom + (value & 0x0F) * 0x2000;
+	}
+}
+
+static uint8_t mapper_000b_chr_read(struct nes_state *state, uint32_t addr) {
+	return state->map.m000b.chr_ptr[addr];
+}
+
+static void mapper_000b_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+}