cleanup and rewrite of ppu_registers.c

1 files changed, 0 insertions, 30 deletions

diff --git a/mapper_0042.c b/mapper_0042.c
deleted file mode 100644
index 4cf4c86..0000000
--- a/mapper_0042.c
+++ /dev/null
@@ -1,30 +0,0 @@
-
-static void mapper_0042_init(struct nes_state *state) {
-	state->map.m0042.prg_offset = 0;
-	state->map.m0042.chr_offset = 0;
-}
-
-static uint8_t mapper_0042_prg_read(struct nes_state *state, uint32_t addr) {
-	if(addr >= 0x8000) {
-		uint32_t base = state->map.m0042.prg_offset;
-		return state->prg_rom[base + (addr - 0x8000)];
-	}
-	return 0;
-}
-
-static void mapper_0042_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;
-
-		state->map.m0042.prg_offset = prg_bank * 0x8000;
-		state->map.m0042.chr_offset = chr_bank * 0x2000;
-	}
-}
-
-static uint8_t mapper_0042_chr_read(struct nes_state *state, uint32_t addr) {
-	return state->chr_rom[state->map.m0042.chr_offset + addr];
-}
-
-static void mapper_0042_chr_write(struct nes_state *state, uint32_t addr, uint8_t value) {
-}