move read/write prg/chr/cirom data to mapper

1 files changed, 30 insertions, 7 deletions

diff --git a/mapper_001.c b/mapper_001.c
index 8c65367..4704444 100644
--- a/mapper_001.c
+++ b/mapper_001.c
@@ -4,20 +4,43 @@ 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) {
+static uint8_t mapper_001_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->rom[addr & mask];
+	return state->prg_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_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+}
+
+static uint8_t mapper_001_chr_read(struct nes_state *state, uint32_t addr) {
+	return state->chr_rom[addr];
+}
+
+static void mapper_001_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+}
+
+static uint8_t mapper_001_ciram_read(struct nes_state *state, uint32_t addr) {
+	if(state->ines.mirroring == 0) { // Horizontal
+		addr = (addr & 0x800) | (addr & 0x3ff);
+	} else { // Vertical (default fallback)
+		addr = addr & 0x7ff;
+	}
+
+	return state->ciram[addr];
+}
+
+static void mapper_001_ciram_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+	if(state->ines.mirroring == 0) {
+		addr = (addr & 0x800) | (addr & 0x3ff);
+	} else {
+		addr = addr & 0x7ff;
+	}
+
+	state->ciram[addr] = value;
 }
 
 static void mapper_001_tick(struct nes_state *state) {
-	(void)state;
 }