diff options
Diffstat (limited to 'mknes.c')
| -rw-r--r-- | mknes.c | 63 |
1 files changed, 61 insertions, 2 deletions
@@ -8,19 +8,78 @@ #include "memory.c" #include "cpu.c" #include "ines2.c" +#include "mapper.c" +struct nes_state nstate; -static void render_callback() { +static uint32_t frames; +static void render_callback(void) { + clear_buffer(); + + while(!nstate.ppu.frame_ready) { + cpu_tick(&nstate); + } + nstate.ppu.frame_ready = 0; + frames++; + + uint32_t *dst = RENDER_START(0,0); + uint8_t *src = nstate.ppu.pixels; + for(uint32_t y = 0; y < 240; ++y) { + for(uint32_t x = 0; x < 256; ++x) { + uint8_t val = *src++; + if(val >= 64) val = 0; + dst[x] = nes_palette[val]; + } + dst += BUFFER_WIDTH; + } +} + +static void shutdown_callback() { + printf("%d\n", frames); } static void audio_callback(int16_t *buffer, size_t frames) { } -static void init_callback() { +#include <sys/mman.h> +#include <unistd.h> + +void protect_opcode_lut(void) { + uintptr_t addr = (uintptr_t)opcode_lut; + size_t page_size = getpagesize(); + uintptr_t page = addr & ~(page_size - 1); + + if(mprotect((void*)page, page_size, PROT_READ) != 0) { + perror("mprotect"); + abort(); + } +} + +static void init_callback(void) { + setbuf(stdout, 0); + init_opcode_lut(); + init_opcode_ud_lut(); + // protect_opcode_lut(); + ppu_reset(&nstate); + // ines2_load(&nstate, "data/nrom/Super Mario Bros. (World) (HVC-SM).nes"); + // ines2_load(&nstate, "data/nrom/10-Yard Fight (USA, Europe).nes"); + // ines2_load(&nstate, "data/nrom/Balloon Fight (USA).nes"); + ines2_load(&nstate, "data/nrom/Excitebike (Japan, USA).nes"); + // ines2_load(&nstate, "data/nrom/Ice Climber (USA, Europe, Korea).nes"); + // ines2_load(&nstate, "data/nrom/Kung Fu (Japan, USA).nes"); + // ines2_load(&nstate, "data/nrom/Super Mario Bros. (World) (HVC-SM).nes"); + // ines2_load(&nstate, "data/nrom/Urban Champion (World).nes"); + // ines2_load(&nstate, "data/nrom/Wrecking Crew (World).nes"); + + + mapper_setup(&nstate); + uint32_t lo = nstate.mapper.read(&nstate, 0xfffc); + uint32_t hi = nstate.mapper.read(&nstate, 0xfffd); + nstate.cpu.pc = (hi << 8) | lo; } // int main(void) { |