1 files changed, 23 insertions, 0 deletions
diff --git a/mapper_001.c b/mapper_001.c
new file mode 100644
index 0000000..8c65367
--- /dev/null
+++ b/mapper_001.c
@@ -0,0 +1,23 @@
+
+
+static void mapper_001_init(struct nes_state *state) {
+	// Nothing to initialize for 001
+}
+
+static uint8_t mapper_001_read(struct nes_state *state, uint32_t addr) {
+	uint32_t prg_size = state->ines.prg_size;
+
+	uint32_t mask = (state->ines.prg_size == 16384) ? 0x3fff : 0x7fff;
+	return state->rom[addr & mask];
+}
+
+static void mapper_001_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+	(void)state;
+	(void)addr;
+	(void)value;
+}
+
+static void mapper_001_tick(struct nes_state *state) {
+	(void)state;
+}
+