transform to switch case for ppu_tick()

1 files changed, 24 insertions, 0 deletions

diff --git a/mapper_0000.c b/mapper_0000.c
new file mode 100644
index 0000000..e075de5
--- /dev/null
+++ b/mapper_0000.c
@@ -0,0 +1,24 @@
+
+
+static void mapper_0000_init(struct nes_state *state) {
+	// Nothing to initialize for 001
+}
+
+__attribute__((hot))
+static uint8_t mapper_0000_prg_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->prg_rom[addr & mask];
+}
+
+static void mapper_0000_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+}
+
+__attribute__((hot))
+static uint8_t mapper_0000_chr_read(struct nes_state *state, uint32_t addr) {
+	return state->chr_rom[addr];
+}
+
+static void mapper_0000_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+}