From e28ad1546509de31b706f0fd300a906e5bc55199 Mon Sep 17 00:00:00 2001 From: Peter Fors Date: Thu, 8 May 2025 21:03:43 +0200 Subject: new and changed mappers --- mappers/mapper_003_2.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'mappers/mapper_003_2.c') diff --git a/mappers/mapper_003_2.c b/mappers/mapper_003_2.c index e93916a..b780a8f 100644 --- a/mappers/mapper_003_2.c +++ b/mappers/mapper_003_2.c @@ -1,21 +1,26 @@ +__attribute__((section(".mapper_003_2"), hot)) static uint8_t mapper_003_2_prg_read(struct nes_state *state, uint32_t addr) { return state->prg_rom[addr & 0x7fff]; } +__attribute__((section(".mapper_003_2"), hot)) static void mapper_003_2_prg_write(struct nes_state *state, uint32_t addr, uint8_t value) { struct mapper_003_2 *mapper = (struct mapper_003_2 *)&state->map; if(addr >= 0x8000) { + value &= state->prg_rom[addr & 0x7fff]; mapper->chr_ptr = state->chr_rom + (value & 3) * 0x2000; } } +__attribute__((section(".mapper_003_2"), hot)) static uint8_t mapper_003_2_chr_read(struct nes_state *state, uint32_t addr) { struct mapper_003_2 *mapper = (struct mapper_003_2 *)&state->map; return mapper->chr_ptr[addr]; } +__attribute__((section(".mapper_003_2"))) static void mapper_003_2_init(struct nes_state *state) { struct mapper_003_2 *mapper = (struct mapper_003_2 *)&state->map; -- cgit v1.2.3