From 5808f00555c48e1cc1cc110af6a5cd73ddf13010 Mon Sep 17 00:00:00 2001 From: Peter Fors Date: Fri, 2 May 2025 23:15:47 +0200 Subject: cleanup and rewrite of ppu_registers.c --- mapper_0042.c | 30 ------------------------------ 1 file changed, 30 deletions(-) delete mode 100644 mapper_0042.c (limited to 'mapper_0042.c') 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) { -} -- cgit v1.2.3