From e8ff6bf2ab9982c5e5ab8d8f4e7adcc5207d079d Mon Sep 17 00:00:00 2001 From: Peter Fors Date: Sat, 29 Mar 2025 19:57:00 +0100 Subject: first mknes commit --- mapper_nrom.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 mapper_nrom.c (limited to 'mapper_nrom.c') diff --git a/mapper_nrom.c b/mapper_nrom.c new file mode 100644 index 0000000..425db31 --- /dev/null +++ b/mapper_nrom.c @@ -0,0 +1,27 @@ + + +static void mapper_nrom_init(struct state *state) { + // Nothing to initialize for NROM +} + +static uint8_t mapper_nrom_read(struct state *state, uint16_t addr) { + uint32_t prg_size = state->ines.prg_size; + + if(state->ines.prg_size == 16384) { + return state->rom[addr & 0x3fff]; + } else { + return state->rom[addr - 0x8000]; + } + return 0; +} + +static void mapper_nrom_write(struct state *state, uint16_t addr, uint8_t value) { + (void)state; + (void)addr; + (void)value; +} + +static void mapper_nrom_tick(struct state *state) { + (void)state; +} + -- cgit v1.2.3