#include #include #include #include #include #include #include #include #ifndef WIIU #define AUDIO_FREQUENCY 384000 #else /* Use the internal sample rate for the Wii U */ #define AUDIO_FREQUENCY 48000 #endif #ifdef _WIN32 #include #include #define snprintf _snprintf #endif #include #include "libretro.h" #ifdef _WIN32 static const char slash = '\\'; #else static const char slash = '/'; #endif #define VIDEO_WIDTH 160 #define VIDEO_HEIGHT 144 #define VIDEO_PIXELS (VIDEO_WIDTH * VIDEO_HEIGHT) #define SGB_VIDEO_WIDTH 256 #define SGB_VIDEO_HEIGHT 224 #define SGB_VIDEO_PIXELS (SGB_VIDEO_WIDTH * SGB_VIDEO_HEIGHT) #define RETRO_MEMORY_GAMEBOY_1_SRAM ((1 << 8) | RETRO_MEMORY_SAVE_RAM) #define RETRO_MEMORY_GAMEBOY_1_RTC ((2 << 8) | RETRO_MEMORY_RTC) #define RETRO_MEMORY_GAMEBOY_2_SRAM ((3 << 8) | RETRO_MEMORY_SAVE_RAM) #define RETRO_MEMORY_GAMEBOY_2_RTC ((3 << 8) | RETRO_MEMORY_RTC) #define RETRO_GAME_TYPE_GAMEBOY_LINK_2P 0x101 char battery_save_path[512]; char symbols_path[512]; enum model { MODEL_DMG, MODEL_CGB, MODEL_AGB, MODEL_SGB, MODEL_SGB2, MODEL_AUTO }; static const GB_model_t libretro_to_internal_model[] = { [MODEL_DMG] = GB_MODEL_DMG_B, [MODEL_CGB] = GB_MODEL_CGB_E, [MODEL_AGB] = GB_MODEL_AGB, [MODEL_SGB] = GB_MODEL_SGB, [MODEL_SGB2] = GB_MODEL_SGB2 }; enum screen_layout { LAYOUT_TOP_DOWN, LAYOUT_LEFT_RIGHT }; enum audio_out { GB_1, GB_2 }; static enum model model[2]; static enum model auto_model = MODEL_CGB; static uint32_t *frame_buf = NULL; static uint32_t *frame_buf_copy = NULL; static struct retro_log_callback logging; static retro_log_printf_t log_cb; static retro_video_refresh_t video_cb; static retro_audio_sample_t audio_sample_cb; static retro_input_poll_t input_poll_cb; static retro_input_state_t input_state_cb; static unsigned emulated_devices = 1; static bool initialized = false; static unsigned screen_layout = 0; static unsigned audio_out = 0; static unsigned sgb_border = 1; static bool geometry_updated = false; static bool link_cable_emulation = false; /*static bool infrared_emulation = false;*/ signed short soundbuf[1024 * 2]; char retro_system_directory[4096]; char retro_save_directory[4096]; char retro_game_path[4096]; GB_gameboy_t gameboy[2]; extern const unsigned char dmg_boot[], cgb_boot[], agb_boot[], sgb_boot[], sgb2_boot[]; extern const unsigned dmg_boot_length, cgb_boot_length, agb_boot_length, sgb_boot_length, sgb2_boot_length; bool vblank1_occurred = false, vblank2_occurred = false; static void fallback_log(enum retro_log_level level, const char *fmt, ...) { (void)level; va_list va; va_start(va, fmt); vfprintf(stderr, fmt, va); va_end(va); } static struct retro_rumble_interface rumble; static void GB_update_keys_status(GB_gameboy_t *gb, unsigned port) { input_poll_cb(); GB_set_key_state_for_player(gb, GB_KEY_RIGHT, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)); GB_set_key_state_for_player(gb, GB_KEY_LEFT, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)); GB_set_key_state_for_player(gb, GB_KEY_UP, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)); GB_set_key_state_for_player(gb, GB_KEY_DOWN, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)); GB_set_key_state_for_player(gb, GB_KEY_A, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)); GB_set_key_state_for_player(gb, GB_KEY_B, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B)); GB_set_key_state_for_player(gb, GB_KEY_SELECT, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT)); GB_set_key_state_for_player(gb, GB_KEY_START, emulated_devices == 1 ? port : 0, input_state_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)); } static void rumble_callback(GB_gameboy_t *gb, double amplitude) { if (gb == &gameboy[0]) { rumble.set_rumble_state(0, RETRO_RUMBLE_STRONG, 65535 * amplitude); } else if (gb == &gameboy[1]) { rumble.set_rumble_state(1, RETRO_RUMBLE_STRONG, 65535 * amplitude); } } static void audio_callback(GB_gameboy_t *gb, GB_sample_t *sample) { if ((audio_out == GB_1 && gb == &gameboy[0]) || (audio_out == GB_2 && gb == &gameboy[1])) { audio_sample_cb(sample->left, sample->right); } } static void vblank1(GB_gameboy_t *gb) { vblank1_occurred = true; } static void vblank2(GB_gameboy_t *gb) { vblank2_occurred = true; } static bool bit_to_send1 = true, bit_to_send2 = true; static void serial_start1(GB_gameboy_t *gb, bool bit_received) { bit_to_send1 = bit_received; } static bool serial_end1(GB_gameboy_t *gb) { bool ret = GB_serial_get_data_bit(&gameboy[1]); GB_serial_set_data_bit(&gameboy[1], bit_to_send1); return ret; } static void serial_start2(GB_gameboy_t *gb, bool bit_received) { bit_to_send2 = bit_received; } static bool serial_end2(GB_gameboy_t *gb) { bool ret = GB_serial_get_data_bit(&gameboy[0]); GB_serial_set_data_bit(&gameboy[0], bit_to_send2); return ret; } static uint32_t rgb_encode(GB_gameboy_t *gb, uint8_t r, uint8_t g, uint8_t b) { return r <<16 | g <<8 | b; } static retro_environment_t environ_cb; /* variables for single cart mode */ static const struct retro_variable vars_single[] = { { "sameboy_color_correction_mode", "Color correction; off|correct curves|emulate hardware|preserve brightness|reduce contrast" }, { "sameboy_high_pass_filter_mode", "High-pass filter; off|accurate|remove dc offset" }, { "sameboy_model", "Emulated model; Auto|Game Boy|Game Boy Color|Game Boy Advance|Super Game Boy|Super Game Boy 2" }, { "sameboy_border", "Super Game Boy border; enabled|disabled" }, { "sameboy_rumble", "Enable rumble; never|rumble-enabled games|all games" }, { NULL } }; /* variables for dual cart dual gameboy mode */ static const struct retro_variable vars_dual[] = { { "sameboy_link", "Link cable emulation; enabled|disabled" }, /*{ "sameboy_ir", "Infrared Sensor Emulation; disabled|enabled" },*/ { "sameboy_screen_layout", "Screen layout; top-down|left-right" }, { "sameboy_audio_output", "Audio output; Game Boy #1|Game Boy #2" }, { "sameboy_model_1", "Emulated model for Game Boy #1; Auto|Game Boy|Game Boy Color|Game Boy Advance" }, { "sameboy_model_2", "Emulated model for Game Boy #2; Auto|Game Boy|Game Boy Color|Game Boy Advance" }, { "sameboy_color_correction_mode_1", "Color correction for Game Boy #1; off|correct curves|emulate hardware|preserve brightness" }, { "sameboy_color_correction_mode_2", "Color correction for Game Boy #2; off|correct curves|emulate hardware|preserve brightness" }, { "sameboy_high_pass_filter_mode_1", "High-pass filter for Game Boy #1; off|accurate|remove dc offset" }, { "sameboy_high_pass_filter_mode_2", "High-pass filter for Game Boy #2; off|accurate|remove dc offset" }, { "sameboy_rumble_1", "Enable rumble for Game Boy #1; never|rumble-enabled games|all games" }, { "sameboy_rumble_2", "Enable rumble for Game Boy #2; never|rumble-enabled games|all games" }, { NULL } }; static const struct retro_subsystem_memory_info gb1_memory[] = { { "srm", RETRO_MEMORY_GAMEBOY_1_SRAM }, { "rtc", RETRO_MEMORY_GAMEBOY_1_RTC }, }; static const struct retro_subsystem_memory_info gb2_memory[] = { { "srm", RETRO_MEMORY_GAMEBOY_2_SRAM }, { "rtc", RETRO_MEMORY_GAMEBOY_2_RTC }, }; static const struct retro_subsystem_rom_info gb_roms[] = { { "GameBoy #1", "gb|gbc", true, false, true, gb1_memory, 1 }, { "GameBoy #2", "gb|gbc", true, false, true, gb2_memory, 1 }, }; static const struct retro_subsystem_info subsystems[] = { { "2 Player Game Boy Link", "gb_link_2p", gb_roms, 2, RETRO_GAME_TYPE_GAMEBOY_LINK_2P }, { NULL }, }; static const struct retro_controller_description controllers[] = { { "Nintendo Game Boy", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) }, }; static const struct retro_controller_description controllers_sgb[] = { { "SNES/SFC Gamepad", RETRO_DEVICE_SUBCLASS(RETRO_DEVICE_JOYPAD, 0) }, }; static struct retro_input_descriptor descriptors_1p[] = { { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 0 }, }; static struct retro_input_descriptor descriptors_2p[] = { { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 0 }, }; static struct retro_input_descriptor descriptors_4p[] = { { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 2, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" }, { 3, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" }, { 0 }, }; static void set_link_cable_state(bool state) { if (state && emulated_devices == 2) { GB_set_serial_transfer_bit_start_callback(&gameboy[0], serial_start1); GB_set_serial_transfer_bit_end_callback(&gameboy[0], serial_end1); GB_set_serial_transfer_bit_start_callback(&gameboy[1], serial_start2); GB_set_serial_transfer_bit_end_callback(&gameboy[1], serial_end2); } else if (!state) { GB_set_serial_transfer_bit_start_callback(&gameboy[0], NULL); GB_set_serial_transfer_bit_end_callback(&gameboy[0], NULL); GB_set_serial_transfer_bit_start_callback(&gameboy[1], NULL); GB_set_serial_transfer_bit_end_callback(&gameboy[1], NULL); } } static void init_for_current_model(unsigned id) { unsigned i = id; enum model effective_model; effective_model = model[i]; if (effective_model == MODEL_AUTO) { effective_model = auto_model; } if (GB_is_inited(&gameboy[i])) { GB_switch_model_and_reset(&gameboy[i], libretro_to_internal_model[effective_model]); } else { GB_init(&gameboy[i], libretro_to_internal_model[effective_model]); } const char *model_name = (const char *[]){"dmg", "cgb", "agb", "sgb", "sgb2"}[effective_model]; const unsigned char *boot_code = (const unsigned char *[]){dmg_boot, cgb_boot, agb_boot, sgb_boot, sgb2_boot}[effective_model]; unsigned boot_length = (unsigned []){dmg_boot_length, cgb_boot_length, agb_boot_length, sgb_boot_length, sgb2_boot_length}[effective_model]; char buf[256]; snprintf(buf, sizeof(buf), "%s%c%s_boot.bin", retro_system_directory, slash, model_name); log_cb(RETRO_LOG_INFO, "Initializing as model: %s\n", model_name); log_cb(RETRO_LOG_INFO, "Loading boot image: %s\n", buf); if (GB_load_boot_rom(&gameboy[i], buf)) GB_load_boot_rom_from_buffer(&gameboy[i], boot_code, boot_length); GB_set_user_data(&gameboy[i], (void*)NULL); GB_set_pixels_output(&gameboy[i],(unsigned int*)(frame_buf + i * ((model[i] == MODEL_SGB || model[i] == MODEL_SGB2) ? SGB_VIDEO_PIXELS : VIDEO_PIXELS))); GB_set_rgb_encode_callback(&gameboy[i], rgb_encode); GB_set_sample_rate(&gameboy[i], AUDIO_FREQUENCY); GB_apu_set_sample_callback(&gameboy[i], audio_callback); GB_set_rumble_callback(&gameboy[i], rumble_callback); GB_set_rumble_mode(&gameboy[i], GB_RUMBLE_CARTRIDGE_ONLY); /* todo: attempt to make these more generic */ GB_set_vblank_callback(&gameboy[0], (GB_vblank_callback_t) vblank1); if (emulated_devices == 2) { GB_set_vblank_callback(&gameboy[1], (GB_vblank_callback_t) vblank2); if (link_cable_emulation) set_link_cable_state(true); } struct retro_memory_descriptor descs[11]; size_t size; uint16_t bank; /* todo: add netplay awareness for this so achievements can be granted on the respective client */ i = 0; memset(descs, 0, sizeof(descs)); descs[0].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_IE, &size, &bank); descs[0].start = 0xFFFF; descs[0].len = 1; descs[1].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_HRAM, &size, &bank); descs[1].start = 0xFF80; descs[1].len = 0x0080; descs[2].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_RAM, &size, &bank); descs[2].start = 0xC000; descs[2].len = 0x1000; descs[3].ptr = descs[2].ptr + 0x1000; /* GB RAM/GBC RAM bank 1 */ descs[3].start = 0xD000; descs[3].len = 0x1000; descs[4].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_CART_RAM, &size, &bank); descs[4].start = 0xA000; descs[4].len = 0x2000; descs[5].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_VRAM, &size, &bank); descs[5].start = 0x8000; descs[5].len = 0x2000; descs[6].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_ROM, &size, &bank); descs[6].start = 0x0000; descs[6].len = 0x4000; descs[6].flags = RETRO_MEMDESC_CONST; descs[7].ptr = descs[6].ptr + (bank * 0x4000); descs[7].start = 0x4000; descs[7].len = 0x4000; descs[7].flags = RETRO_MEMDESC_CONST; descs[8].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_OAM, &size, &bank); descs[8].start = 0xFE00; descs[8].len = 0x00A0; descs[8].select = 0xFFFFFF00; descs[9].ptr = descs[2].ptr + 0x2000; /* GBC RAM bank 2 */ descs[9].start = 0x10000; descs[9].len = GB_is_cgb(&gameboy[i]) ? 0x6000 : 0; /* 0x1000 per bank (2-7), unmapped on GB */ descs[9].select = 0xFFFF0000; descs[10].ptr = GB_get_direct_access(&gameboy[i], GB_DIRECT_ACCESS_IO, &size, &bank); descs[10].start = 0xFF00; descs[10].len = 0x0080; descs[10].select = 0xFFFFFF00; struct retro_memory_map mmaps; mmaps.descriptors = descs; mmaps.num_descriptors = sizeof(descs) / sizeof(descs[0]); environ_cb(RETRO_ENVIRONMENT_SET_MEMORY_MAPS, &mmaps); /* Let's be extremely nitpicky about how devices and descriptors are set */ if (emulated_devices == 1 && (model[0] == MODEL_SGB || model[0] == MODEL_SGB2)) { static const struct retro_controller_info ports[] = { { controllers_sgb, 1 }, { controllers_sgb, 1 }, { controllers_sgb, 1 }, { controllers_sgb, 1 }, { NULL, 0 }, }; environ_cb(RETRO_ENVIRONMENT_SET_CONTROLLER_INFO, (void*)ports); environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, descriptors_4p); } else if (emulated_devices == 1) { static const struct retro_controller_info ports[] = { { controllers, 1 }, { NULL, 0 }, }; environ_cb(RETRO_ENVIRONMENT_SET_CONTROLLER_INFO, (void*)ports); environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, descriptors_1p); } else { static const struct retro_controller_info ports[] = { { controllers, 1 }, { controllers, 1 }, { NULL, 0 }, }; environ_cb(RETRO_ENVIRONMENT_SET_CONTROLLER_INFO, (void*)ports); environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, descriptors_2p); } } static void check_variables() { struct retro_variable var = {0}; if (emulated_devices == 1) { var.key = "sameboy_color_correction_mode"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "off") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_DISABLED); else if (strcmp(var.value, "correct curves") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_CORRECT_CURVES); else if (strcmp(var.value, "emulate hardware") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_EMULATE_HARDWARE); else if (strcmp(var.value, "preserve brightness") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS); else if (strcmp(var.value, "reduce contrast") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_REDUCE_CONTRAST); } var.key = "sameboy_rumble"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "never") == 0) GB_set_rumble_mode(&gameboy[0], GB_RUMBLE_DISABLED); else if (strcmp(var.value, "rumble-enabled games") == 0) GB_set_rumble_mode(&gameboy[0], GB_RUMBLE_CARTRIDGE_ONLY); else if (strcmp(var.value, "all games") == 0) GB_set_rumble_mode(&gameboy[0], GB_RUMBLE_ALL_GAMES); } var.key = "sameboy_high_pass_filter_mode"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "off") == 0) GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_OFF); else if (strcmp(var.value, "accurate") == 0) GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_ACCURATE); else if (strcmp(var.value, "remove dc offset") == 0) GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_REMOVE_DC_OFFSET); } var.key = "sameboy_model"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { enum model new_model = model[0]; if (strcmp(var.value, "Game Boy") == 0) new_model = MODEL_DMG; else if (strcmp(var.value, "Game Boy Color") == 0) new_model = MODEL_CGB; else if (strcmp(var.value, "Game Boy Advance") == 0) new_model = MODEL_AGB; else if (strcmp(var.value, "Super Game Boy") == 0) new_model = MODEL_SGB; else if (strcmp(var.value, "Super Game Boy 2") == 0) new_model = MODEL_SGB2; else new_model = MODEL_AUTO; if (new_model != model[0]) { geometry_updated = true; model[0] = new_model; init_for_current_model(0); } } var.key = "sameboy_border"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "enabled") == 0) sgb_border = 1; else if (strcmp(var.value, "disabled") == 0) sgb_border = 0; } } else { var.key = "sameboy_color_correction_mode_1"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "off") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_DISABLED); else if (strcmp(var.value, "correct curves") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_CORRECT_CURVES); else if (strcmp(var.value, "emulate hardware") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_EMULATE_HARDWARE); else if (strcmp(var.value, "preserve brightness") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS); else if (strcmp(var.value, "reduce contrast") == 0) GB_set_color_correction_mode(&gameboy[0], GB_COLOR_CORRECTION_REDUCE_CONTRAST); } var.key = "sameboy_color_correction_mode_2"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "off") == 0) GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_DISABLED); else if (strcmp(var.value, "correct curves") == 0) GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_CORRECT_CURVES); else if (strcmp(var.value, "emulate hardware") == 0) GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_EMULATE_HARDWARE); else if (strcmp(var.value, "preserve brightness") == 0) GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_PRESERVE_BRIGHTNESS); else if (strcmp(var.value, "reduce contrast") == 0) GB_set_color_correction_mode(&gameboy[1], GB_COLOR_CORRECTION_REDUCE_CONTRAST); } var.key = "sameboy_rumble_1"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "never") == 0) GB_set_rumble_mode(&gameboy[0], GB_RUMBLE_DISABLED); else if (strcmp(var.value, "rumble-enabled games") == 0) GB_set_rumble_mode(&gameboy[0], GB_RUMBLE_CARTRIDGE_ONLY); else if (strcmp(var.value, "all games") == 0) GB_set_rumble_mode(&gameboy[0], GB_RUMBLE_ALL_GAMES); } var.key = "sameboy_rumble_2"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "never") == 0) GB_set_rumble_mode(&gameboy[1], GB_RUMBLE_DISABLED); else if (strcmp(var.value, "rumble-enabled games") == 0) GB_set_rumble_mode(&gameboy[1], GB_RUMBLE_CARTRIDGE_ONLY); else if (strcmp(var.value, "all games") == 0) GB_set_rumble_mode(&gameboy[1], GB_RUMBLE_ALL_GAMES); } var.key = "sameboy_high_pass_filter_mode_1"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "off") == 0) GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_OFF); else if (strcmp(var.value, "accurate") == 0) GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_ACCURATE); else if (strcmp(var.value, "remove dc offset") == 0) GB_set_highpass_filter_mode(&gameboy[0], GB_HIGHPASS_REMOVE_DC_OFFSET); } var.key = "sameboy_high_pass_filter_mode_2"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "off") == 0) GB_set_highpass_filter_mode(&gameboy[1], GB_HIGHPASS_OFF); else if (strcmp(var.value, "accurate") == 0) GB_set_highpass_filter_mode(&gameboy[1], GB_HIGHPASS_ACCURATE); else if (strcmp(var.value, "remove dc offset") == 0) GB_set_highpass_filter_mode(&gameboy[1], GB_HIGHPASS_REMOVE_DC_OFFSET); } var.key = "sameboy_model_1"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { enum model new_model = model[0]; if (strcmp(var.value, "Game Boy") == 0) new_model = MODEL_DMG; else if (strcmp(var.value, "Game Boy Color") == 0) new_model = MODEL_CGB; else if (strcmp(var.value, "Game Boy Advance") == 0) new_model = MODEL_AGB; else if (strcmp(var.value, "Super Game Boy") == 0) new_model = MODEL_SGB; else if (strcmp(var.value, "Super Game Boy 2") == 0) new_model = MODEL_SGB2; else new_model = MODEL_AUTO; if (model[0] != new_model) { model[0] = new_model; init_for_current_model(0); } } var.key = "sameboy_model_2"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { enum model new_model = model[1]; if (strcmp(var.value, "Game Boy") == 0) new_model = MODEL_DMG; else if (strcmp(var.value, "Game Boy Color") == 0) new_model = MODEL_CGB; else if (strcmp(var.value, "Game Boy Advance") == 0) new_model = MODEL_AGB; else if (strcmp(var.value, "Super Game Boy") == 0) new_model = MODEL_SGB; else if (strcmp(var.value, "Super Game Boy 2") == 0) new_model = MODEL_SGB; else new_model = MODEL_AUTO; if (model[1] != new_model) { model[1] = new_model; init_for_current_model(1); } } var.key = "sameboy_screen_layout"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "top-down") == 0) screen_layout = LAYOUT_TOP_DOWN; else screen_layout = LAYOUT_LEFT_RIGHT; geometry_updated = true; } var.key = "sameboy_link"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { bool tmp = link_cable_emulation; if (strcmp(var.value, "enabled") == 0) link_cable_emulation = true; else link_cable_emulation = false; if (link_cable_emulation && link_cable_emulation != tmp) set_link_cable_state(true); else if (!link_cable_emulation && link_cable_emulation != tmp) set_link_cable_state(false); } var.key = "sameboy_audio_output"; var.value = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) { if (strcmp(var.value, "Game Boy #1") == 0) audio_out = GB_1; else audio_out = GB_2; } } } void retro_init(void) { const char *dir = NULL; if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) snprintf(retro_system_directory, sizeof(retro_system_directory), "%s", dir); else snprintf(retro_system_directory, sizeof(retro_system_directory), "%s", "."); if (environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &dir) && dir) snprintf(retro_save_directory, sizeof(retro_save_directory), "%s", dir); else snprintf(retro_save_directory, sizeof(retro_save_directory), "%s", "."); if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &logging)) log_cb = logging.log; else log_cb = fallback_log; } void retro_deinit(void) { free(frame_buf); free(frame_buf_copy); frame_buf = NULL; frame_buf_copy = NULL; } unsigned retro_api_version(void) { return RETRO_API_VERSION; } void retro_set_controller_port_device(unsigned port, unsigned device) { log_cb(RETRO_LOG_INFO, "Connecting device %u into port %u\n", device, port); } void retro_get_system_info(struct retro_system_info *info) { memset(info, 0, sizeof(*info)); info->library_name = "SameBoy"; #ifdef GIT_VERSION info->library_version = SAMEBOY_CORE_VERSION GIT_VERSION; #else info->library_version = SAMEBOY_CORE_VERSION; #endif info->need_fullpath = true; info->valid_extensions = "gb|gbc"; } void retro_get_system_av_info(struct retro_system_av_info *info) { struct retro_game_geometry geom; struct retro_system_timing timing = { GB_get_usual_frame_rate(&gameboy[0]), AUDIO_FREQUENCY }; if (emulated_devices == 2) { if (screen_layout == LAYOUT_TOP_DOWN) { geom.base_width = VIDEO_WIDTH; geom.base_height = VIDEO_HEIGHT * emulated_devices; geom.aspect_ratio = (double)VIDEO_WIDTH / (emulated_devices * VIDEO_HEIGHT); } else if (screen_layout == LAYOUT_LEFT_RIGHT) { geom.base_width = VIDEO_WIDTH * emulated_devices; geom.base_height = VIDEO_HEIGHT; geom.aspect_ratio = ((double)VIDEO_WIDTH * emulated_devices) / VIDEO_HEIGHT; } } else { if (model[0] == MODEL_SGB || model[0] == MODEL_SGB2) { geom.base_width = SGB_VIDEO_WIDTH; geom.base_height = SGB_VIDEO_HEIGHT; geom.aspect_ratio = (double)SGB_VIDEO_WIDTH / SGB_VIDEO_HEIGHT; } else { geom.base_width = VIDEO_WIDTH; geom.base_height = VIDEO_HEIGHT; geom.aspect_ratio = (double)VIDEO_WIDTH / VIDEO_HEIGHT; } } geom.max_width = SGB_VIDEO_WIDTH * emulated_devices; geom.max_height = SGB_VIDEO_HEIGHT * emulated_devices; info->geometry = geom; info->timing = timing; } void retro_set_environment(retro_environment_t cb) { environ_cb = cb; cb(RETRO_ENVIRONMENT_SET_SUBSYSTEM_INFO, (void*)subsystems); } void retro_set_audio_sample(retro_audio_sample_t cb) { audio_sample_cb = cb; } void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { } void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; } void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; } void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; } void retro_reset(void) { for (int i = 0; i < emulated_devices; i++) GB_reset(&gameboy[i]); } void retro_run(void) { bool updated = false; if (!initialized) geometry_updated = false; if (geometry_updated) { struct retro_system_av_info info; retro_get_system_av_info(&info); environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &info.geometry); geometry_updated = false; } if (!frame_buf) return; if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated) check_variables(); if (emulated_devices == 2) { GB_update_keys_status(&gameboy[0], 0); GB_update_keys_status(&gameboy[1], 1); } else if (emulated_devices == 1 && (model[0] == MODEL_SGB || model[0] == MODEL_SGB2)) { for (unsigned i = 0; i < 4; i++) GB_update_keys_status(&gameboy[0], i); } else GB_update_keys_status(&gameboy[0], 0); vblank1_occurred = vblank2_occurred = false; signed delta = 0; if (emulated_devices == 2) { while (!vblank1_occurred || !vblank2_occurred) { if (delta >= 0) { delta -= GB_run(&gameboy[0]); } else { delta += GB_run(&gameboy[1]); } } } else { GB_run_frame(&gameboy[0]); } if (emulated_devices == 2) { if (screen_layout == LAYOUT_TOP_DOWN) { video_cb(frame_buf, VIDEO_WIDTH, VIDEO_HEIGHT * emulated_devices, VIDEO_WIDTH * sizeof(uint32_t)); } else if (screen_layout == LAYOUT_LEFT_RIGHT) { /* use slow memcpy method for now */ for (int index = 0; index < emulated_devices; index++) { for (int y = 0; y < VIDEO_HEIGHT; y++) { for (int x = 0; x < VIDEO_WIDTH; x++) { frame_buf_copy[VIDEO_WIDTH * emulated_devices * y + (x + VIDEO_WIDTH * index)] = frame_buf[VIDEO_WIDTH * (y + VIDEO_HEIGHT * index) + x]; } } } video_cb(frame_buf_copy, VIDEO_WIDTH * emulated_devices, VIDEO_HEIGHT, VIDEO_WIDTH * emulated_devices * sizeof(uint32_t)); } } else { if (model[0] == MODEL_SGB || model[0] == MODEL_SGB2) { if (sgb_border == 1) video_cb(frame_buf, SGB_VIDEO_WIDTH, SGB_VIDEO_HEIGHT, SGB_VIDEO_WIDTH * sizeof(uint32_t)); else { int crop = SGB_VIDEO_WIDTH * ((SGB_VIDEO_HEIGHT - VIDEO_HEIGHT) / 2) + ((SGB_VIDEO_WIDTH - VIDEO_WIDTH) / 2); video_cb(frame_buf + crop, VIDEO_WIDTH, VIDEO_HEIGHT, SGB_VIDEO_WIDTH * sizeof(uint32_t)); } } else video_cb(frame_buf, VIDEO_WIDTH, VIDEO_HEIGHT, VIDEO_WIDTH * sizeof(uint32_t)); } initialized = true; } bool retro_load_game(const struct retro_game_info *info) { environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_single); check_variables(); frame_buf = (uint32_t*)malloc(SGB_VIDEO_PIXELS *emulated_devices * sizeof(uint32_t)); memset(frame_buf, 0, SGB_VIDEO_PIXELS * emulated_devices * sizeof(uint32_t)); enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_XRGB8888; if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { log_cb(RETRO_LOG_INFO, "XRGB8888 is not supported\n"); return false; } auto_model = (info->path[strlen(info->path) - 1] & ~0x20) == 'C' ? MODEL_CGB : MODEL_DMG; snprintf(retro_game_path, sizeof(retro_game_path), "%s", info->path); for (int i = 0; i < emulated_devices; i++) { init_for_current_model(i); if (GB_load_rom(&gameboy[i], info->path)) { log_cb(RETRO_LOG_INFO, "Failed to load ROM at %s\n", info->path); return false; } } bool achievements = true; environ_cb(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &achievements); if (environ_cb(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumble)) log_cb(RETRO_LOG_INFO, "Rumble environment supported\n"); else log_cb(RETRO_LOG_INFO, "Rumble environment not supported\n"); check_variables(); return true; } void retro_unload_game(void) { for (int i = 0; i < emulated_devices; i++) GB_free(&gameboy[i]); } unsigned retro_get_region(void) { return RETRO_REGION_NTSC; } bool retro_load_game_special(unsigned type, const struct retro_game_info *info, size_t num_info) { if (type == RETRO_GAME_TYPE_GAMEBOY_LINK_2P) emulated_devices = 2; else return false; /* all other types are unhandled for now */ environ_cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars_dual); check_variables(); frame_buf = (uint32_t*)malloc(emulated_devices * SGB_VIDEO_PIXELS * sizeof(uint32_t)); frame_buf_copy = (uint32_t*)malloc(emulated_devices * SGB_VIDEO_PIXELS * sizeof(uint32_t)); memset(frame_buf, 0, emulated_devices * SGB_VIDEO_PIXELS * sizeof(uint32_t)); memset(frame_buf_copy, 0, emulated_devices * SGB_VIDEO_PIXELS * sizeof(uint32_t)); enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_XRGB8888; if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) { log_cb(RETRO_LOG_INFO, "XRGB8888 is not supported\n"); return false; } auto_model = (info->path[strlen(info->path) - 1] & ~0x20) == 'C' ? MODEL_CGB : MODEL_DMG; snprintf(retro_game_path, sizeof(retro_game_path), "%s", info->path); for (int i = 0; i < emulated_devices; i++) { init_for_current_model(i); if (GB_load_rom(&gameboy[i], info[i].path)) { log_cb(RETRO_LOG_INFO, "Failed to load ROM\n"); return false; } } bool achievements = true; environ_cb(RETRO_ENVIRONMENT_SET_SUPPORT_ACHIEVEMENTS, &achievements); if (environ_cb(RETRO_ENVIRONMENT_GET_RUMBLE_INTERFACE, &rumble)) log_cb(RETRO_LOG_INFO, "Rumble environment supported\n"); else log_cb(RETRO_LOG_INFO, "Rumble environment not supported\n"); check_variables(); return true; } size_t retro_serialize_size(void) { static size_t maximum_save_size = 0; if (maximum_save_size) { return maximum_save_size * 2; } GB_gameboy_t temp; GB_init(&temp, GB_MODEL_DMG_B); maximum_save_size = GB_get_save_state_size(&temp); GB_free(&temp); GB_init(&temp, GB_MODEL_CGB_E); maximum_save_size = MAX(maximum_save_size, GB_get_save_state_size(&temp)); GB_free(&temp); GB_init(&temp, GB_MODEL_SGB2); maximum_save_size = MAX(maximum_save_size, GB_get_save_state_size(&temp)); GB_free(&temp); return maximum_save_size * 2; } bool retro_serialize(void *data, size_t size) { if (!initialized || !data) return false; size_t offset = 0; for (int i = 0; i < emulated_devices; i++) { size_t state_size = GB_get_save_state_size(&gameboy[i]); if (state_size > size) { return false; } GB_save_state_to_buffer(&gameboy[i], ((uint8_t *) data) + offset); offset += state_size; size -= state_size; } return true; } bool retro_unserialize(const void *data, size_t size) { for (int i = 0; i < emulated_devices; i++) { size_t state_size = GB_get_save_state_size(&gameboy[i]); if (state_size > size) { return false; } if (GB_load_state_from_buffer(&gameboy[i], data, state_size)) { return false; } size -= state_size; data = ((uint8_t *)data) + state_size; } return true; } void *retro_get_memory_data(unsigned type) { void *data = NULL; if (emulated_devices == 1) { switch (type) { case RETRO_MEMORY_SYSTEM_RAM: data = gameboy[0].ram; break; case RETRO_MEMORY_SAVE_RAM: if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0) data = gameboy[0].mbc_ram; else data = NULL; break; case RETRO_MEMORY_VIDEO_RAM: data = gameboy[0].vram; break; case RETRO_MEMORY_RTC: if (gameboy[0].cartridge_type->has_battery) data = GB_GET_SECTION(&gameboy[0], rtc); else data = NULL; break; default: break; } } else { switch (type) { case RETRO_MEMORY_GAMEBOY_1_SRAM: if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0) data = gameboy[0].mbc_ram; else data = NULL; break; case RETRO_MEMORY_GAMEBOY_2_SRAM: if (gameboy[1].cartridge_type->has_battery && gameboy[1].mbc_ram_size != 0) data = gameboy[1].mbc_ram; else data = NULL; break; case RETRO_MEMORY_GAMEBOY_1_RTC: if (gameboy[0].cartridge_type->has_battery) data = GB_GET_SECTION(&gameboy[0], rtc); else data = NULL; break; case RETRO_MEMORY_GAMEBOY_2_RTC: if (gameboy[1].cartridge_type->has_battery) data = GB_GET_SECTION(&gameboy[1], rtc); else data = NULL; break; default: break; } } return data; } size_t retro_get_memory_size(unsigned type) { size_t size = 0; if (emulated_devices == 1) { switch (type) { case RETRO_MEMORY_SYSTEM_RAM: size = gameboy[0].ram_size; break; case RETRO_MEMORY_SAVE_RAM: if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0) size = gameboy[0].mbc_ram_size; else size = 0; break; case RETRO_MEMORY_VIDEO_RAM: size = gameboy[0].vram_size; break; case RETRO_MEMORY_RTC: if (gameboy[0].cartridge_type->has_battery) size = GB_SECTION_SIZE(rtc); else size = 0; break; default: break; } } else { switch (type) { case RETRO_MEMORY_GAMEBOY_1_SRAM: if (gameboy[0].cartridge_type->has_battery && gameboy[0].mbc_ram_size != 0) size = gameboy[0].mbc_ram_size; else size = 0; break; case RETRO_MEMORY_GAMEBOY_2_SRAM: if (gameboy[1].cartridge_type->has_battery && gameboy[1].mbc_ram_size != 0) size = gameboy[1].mbc_ram_size; else size = 0; break; case RETRO_MEMORY_GAMEBOY_1_RTC: if (gameboy[0].cartridge_type->has_battery) size = GB_SECTION_SIZE(rtc); break; case RETRO_MEMORY_GAMEBOY_2_RTC: if (gameboy[1].cartridge_type->has_battery) size = GB_SECTION_SIZE(rtc); break; default: break; } } return size; } void retro_cheat_reset(void) {} void retro_cheat_set(unsigned index, bool enabled, const char *code) { (void)index; (void)enabled; (void)code; }