1 files changed, 5 insertions, 11 deletions

diff --git a/mappers/mapper_011_0.c b/mappers/mapper_011_0.c
index 12b68ba..6b31f26 100644
--- a/mappers/mapper_011_0.c
+++ b/mappers/mapper_011_0.c
@@ -1,33 +1,27 @@
 
 static uint8_t mapper_011_0_prg_rom_read(struct nes_state *state, uint32_t addr) {
 	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;
-
-	if(addr >= 0x8000) {
-		return mapper->prg_rom[addr - 0x8000];
-	}
-	return 0;
+	return mapper->prg_rom[addr & 0x7fff];
 }
 
 static void mapper_011_0_prg_rom_write(struct nes_state *state, uint32_t addr, uint8_t value) {
 	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;
 
-	if(addr >= 0x8000) {
-		mapper->prg_rom = state->prg_rom + ((value >> 4) & 7) * 0x8000;
-		mapper->chr_ptr = state->chr_rom + (value & 0x0F) * 0x2000;
-	}
+	mapper->prg_rom = state->prg_rom + (value & 0x3) * 0x8000;
+	mapper->chr_rom = state->chr_rom + ((value >> 4) & 0x3) * 0x2000;
 }
 
 static uint8_t mapper_011_0_chr_read(struct nes_state *state, uint32_t addr) {
 	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;
 
-	return mapper->chr_ptr[addr];
+	return mapper->chr_rom[addr];
 }
 
 static void mapper_011_0_init(struct nes_state *state) {
 	struct mapper_011_0 *mapper = &state->mapper_data.m011_0;
 
 	mapper->prg_rom = state->prg_rom;
-	mapper->chr_ptr = state->chr_rom;
+	mapper->chr_rom = state->chr_rom;
 
 	state->mapper_function.prg_rom_read		= mapper_011_0_prg_rom_read;
 	state->mapper_function.prg_rom_write	= mapper_011_0_prg_rom_write;