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

1 files changed, 34 insertions, 3 deletions

diff --git a/mapper_066.c b/mapper_066.c
index aabf471..7a2b542 100644
--- a/mapper_066.c
+++ b/mapper_066.c
@@ -4,15 +4,15 @@ static void mapper_066_init(struct nes_state *state) {
 	state->map.m066.chr_offset = 0;
 }
 
-static uint8_t mapper_066_read(struct nes_state *state, uint32_t addr) {
+static uint8_t mapper_066_prg_read(struct nes_state *state, uint32_t addr) {
 	if(addr >= 0x8000) {
 		uint32_t base = state->map.m066.prg_offset;
-		return state->rom[base + (addr - 0x8000)];
+		return state->prg_rom[base + (addr - 0x8000)];
 	}
 	return 0;
 }
 
-static void mapper_066_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+static void mapper_066_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) {
 	if(addr >= 0x8000) {
 		uint32_t prg_bank = (value >> 4) & 3;
 		uint32_t chr_bank = (value >> 0) & 3;
@@ -22,6 +22,37 @@ static void mapper_066_write(struct nes_state *state, uint32_t addr, uint8_t val
 	}
 }
 
+static uint8_t mapper_066_chr_read(struct nes_state *state, uint32_t addr) {
+	return state->chr_rom[state->map.m066.chr_offset + addr];
+}
+
+static void mapper_066_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+}
+
+static uint8_t mapper_066_ciram_read(struct nes_state *state, uint32_t addr) {
+	uint32_t mirrored = addr & 0x0fff;
+
+	if(state->ines.mirroring == 0) { // Horizontal
+		mirrored = (mirrored & 0x800) | (mirrored & 0x3ff);
+	} else { // Vertical (default fallback)
+		mirrored = mirrored & 0x7ff;
+	}
+
+	return state->ciram[mirrored];
+}
+
+static void mapper_066_ciram_write(struct nes_state *state, uint32_t addr, uint8_t value) {
+	uint32_t mirrored = addr & 0x0fff;
+
+	if(state->ines.mirroring == 0) {
+		mirrored = (mirrored & 0x800) | (mirrored & 0x3ff);
+	} else {
+		mirrored = mirrored & 0x7ff;
+	}
+
+	state->ciram[mirrored] = value;
+}
+
 static void mapper_066_tick(struct nes_state *state) {
 	// No IRQ or timing logic needed
 }