mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-27 03:31:49 +01:00
934 lines
23 KiB
C
934 lines
23 KiB
C
#ifndef _MSC_VER
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#include <stdbool.h>
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#endif
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#include <stddef.h>
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#include <stdarg.h>
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#include <stdio.h>
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#ifdef _MSC_VER
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#define snprintf _snprintf
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#endif
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#ifdef _XBOX1
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#include <xtl.h>
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#endif
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#include "shared.h"
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#include "libretro.h"
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#include "state.h"
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#include "genesis.h"
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#include "md_ntsc.h"
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#include "sms_ntsc.h"
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sms_ntsc_t *sms_ntsc;
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md_ntsc_t *md_ntsc;
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static int vwidth;
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static int vheight;
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unsigned retro_api_version(void) { return RETRO_API_VERSION; }
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static retro_video_refresh_t video_cb;
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static retro_input_poll_t input_poll_cb;
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static retro_input_state_t input_state_cb;
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static retro_environment_t environ_cb;
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static retro_audio_sample_batch_t audio_batch_cb;
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void retro_set_environment(retro_environment_t cb)
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{
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static const struct retro_variable vars[] = {
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{ "blargg_ntsc_filter", "Blargg NTSC filter; disabled|monochrome|composite|svideo|rgb" },
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{ "overscan", "Overscan mode; 0|1|2|3" },
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{ "gg_extra", "Game Gear extended screen; disabled|enabled" },
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{ NULL, NULL },
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};
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environ_cb = cb;
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cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void*)vars);
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}
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void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
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void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
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void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
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void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
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void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
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struct bind_conv
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{
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int retro;
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int genesis;
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};
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static struct bind_conv binds[] = {
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{ RETRO_DEVICE_ID_JOYPAD_B, INPUT_B },
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{ RETRO_DEVICE_ID_JOYPAD_A, INPUT_C },
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{ RETRO_DEVICE_ID_JOYPAD_X, INPUT_Y },
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{ RETRO_DEVICE_ID_JOYPAD_Y, INPUT_A },
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{ RETRO_DEVICE_ID_JOYPAD_START, INPUT_START },
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{ RETRO_DEVICE_ID_JOYPAD_L, INPUT_X },
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{ RETRO_DEVICE_ID_JOYPAD_R, INPUT_Z },
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{ RETRO_DEVICE_ID_JOYPAD_UP, INPUT_UP },
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{ RETRO_DEVICE_ID_JOYPAD_DOWN, INPUT_DOWN },
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{ RETRO_DEVICE_ID_JOYPAD_LEFT, INPUT_LEFT },
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{ RETRO_DEVICE_ID_JOYPAD_RIGHT, INPUT_RIGHT },
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{ RETRO_DEVICE_ID_JOYPAD_SELECT, INPUT_MODE },
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};
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static char g_rom_dir[1024];
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char GG_ROM[256];
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char AR_ROM[256];
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char SK_ROM[256];
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char SK_UPMEM[256];
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char GG_BIOS[256];
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char MS_BIOS_EU[256];
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char MS_BIOS_JP[256];
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char MS_BIOS_US[256];
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char CD_BIOS_EU[256];
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char CD_BIOS_US[256];
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char CD_BIOS_JP[256];
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char DEFAULT_PATH[1024];
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char CD_BRAM_JP[256];
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char CD_BRAM_US[256];
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char CD_BRAM_EU[256];
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char CART_BRAM[256];
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/* Mega CD backup RAM stuff */
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static uint32_t brm_crc[2];
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static uint8_t brm_format[0x40] =
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{
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0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x5f,0x00,0x00,0x00,0x00,0x40,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x53,0x45,0x47,0x41,0x5f,0x43,0x44,0x5f,0x52,0x4f,0x4d,0x00,0x01,0x00,0x00,0x00,
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0x52,0x41,0x4d,0x5f,0x43,0x41,0x52,0x54,0x52,0x49,0x44,0x47,0x45,0x5f,0x5f,0x5f
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};
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/************************************
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* Genesis Plus implementation
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************************************/
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#define CHUNKSIZE (0x10000)
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void error(char * msg, ...)
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{
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#ifndef _XBOX1
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va_list ap;
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va_start(ap, msg);
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vfprintf(stderr, msg, ap);
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va_end(ap);
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#endif
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}
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int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension)
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{
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int size = 0;
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char in[CHUNKSIZE];
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char msg[64] = "Unable to open file";
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/* Open file */
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FILE *fd = fopen(filename, "rb");
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/* Master System & Game Gear BIOS are optional files */
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if (!strcmp(filename,MS_BIOS_US) || !strcmp(filename,MS_BIOS_EU) || !strcmp(filename,MS_BIOS_JP) || !strcmp(filename,GG_BIOS))
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{
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/* disable all messages */
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}
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/* Mega CD BIOS are required files */
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if (!strcmp(filename,CD_BIOS_US) || !strcmp(filename,CD_BIOS_EU) || !strcmp(filename,CD_BIOS_JP))
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{
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snprintf(msg, sizeof(msg), "Unable to open CD BIOS: %s", filename);
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}
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if (!fd)
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{
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fprintf(stderr, "ERROR - %s.\n", msg);
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return 0;
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}
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/* Read first chunk */
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fread(in, CHUNKSIZE, 1, fd);
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{
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int left;
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/* Get file size */
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fseek(fd, 0, SEEK_END);
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size = ftell(fd);
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fseek(fd, 0, SEEK_SET);
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/* size limit */
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if(size > maxsize)
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{
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fclose(fd);
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fprintf(stderr, "ERROR - File is too large.\n");
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return 0;
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}
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sprintf((char *)msg,"Loading %d bytes ...", size);
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fprintf(stderr, "INFORMATION - %s\n", msg);
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/* filename extension */
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if (extension)
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{
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memcpy(extension, &filename[strlen(filename) - 3], 3);
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extension[3] = 0;
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}
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/* Read into buffer */
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left = size;
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while (left > CHUNKSIZE)
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{
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fread(buffer, CHUNKSIZE, 1, fd);
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buffer += CHUNKSIZE;
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left -= CHUNKSIZE;
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}
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/* Read remaining bytes */
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fread(buffer, left, 1, fd);
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}
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/* Close file */
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fclose(fd);
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/* Return loaded ROM size */
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return size;
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}
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static uint16_t bitmap_data_[1024 * 512];
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static void init_bitmap(void)
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{
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memset(&bitmap, 0, sizeof(bitmap));
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bitmap.width = 1024;
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bitmap.height = 512;
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bitmap.pitch = bitmap.width * sizeof(uint16_t);
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bitmap.data = (uint8_t *)bitmap_data_;
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bitmap.viewport.w = 0;
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bitmap.viewport.h = 0;
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bitmap.viewport.x = 0;
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bitmap.viewport.y = 0;
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}
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#define CONFIG_VERSION "GENPLUS-GX 1.7.4"
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static void config_default(void)
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{
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/* version TAG */
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strncpy(config.version,CONFIG_VERSION,16);
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/* sound options */
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config.psg_preamp = 150;
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config.fm_preamp = 100;
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config.hq_fm = 1;
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config.psgBoostNoise = 1;
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config.filter = 0;
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config.lp_range = 0x9999; /* 0.6 in 16.16 fixed point */
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config.low_freq = 880;
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config.high_freq = 5000;
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config.lg = 1.0;
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config.mg = 1.0;
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config.hg = 1.0;
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config.dac_bits = 14;
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config.ym2413 = 2; /* AUTO */
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config.mono = 0;
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/* system options */
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config.system = 0; /* AUTO */
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config.region_detect = 0; /* AUTO */
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config.vdp_mode = 0; /* AUTO */
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config.master_clock = 0; /* AUTO */
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config.force_dtack = 0;
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config.addr_error = 1;
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config.bios = 0;
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config.lock_on = 0;
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config.hot_swap = 0;
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/* video options */
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config.overscan = 0; /* 3 == FULL */
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config.gg_extra = 0; /* 1 = show extended Game Gear screen (256x192) */
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config.ntsc = 0;
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config.render = 0;
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}
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/* these values are used for libretro reporting too */
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static const double pal_fps = 53203424.0 / (3420.0 * 313.0);
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static const double ntsc_fps = 53693175.0 / (3420.0 * 262.0);
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static void init_audio(void)
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{
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audio_init(44100, 0);
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}
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static void configure_controls(void)
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{
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unsigned i;
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switch (system_hw)
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{
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case SYSTEM_MD:
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case SYSTEM_MCD:
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for(i = 0; i < MAX_INPUTS; i++)
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{
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config.input[i].padtype = DEVICE_PAD6B;
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}
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input.system[0] = SYSTEM_MD_GAMEPAD;
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input.system[1] = SYSTEM_MD_GAMEPAD;
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break;
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case SYSTEM_GG:
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case SYSTEM_SMS:
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input.system[0] = SYSTEM_MS_GAMEPAD;
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input.system[1] = SYSTEM_MS_GAMEPAD;
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break;
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default:
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break;
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}
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}
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/* Mega CD backup RAM specific */
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static void bram_load(void)
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{
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FILE *fp;
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/* automatically load internal backup RAM */
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switch (region_code)
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{
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case REGION_JAPAN_NTSC:
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fp = fopen(CD_BRAM_JP, "rb");
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break;
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case REGION_EUROPE:
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fp = fopen(CD_BRAM_EU, "rb");
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break;
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case REGION_USA:
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fp = fopen(CD_BRAM_US, "rb");
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break;
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default:
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return;
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}
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if (fp != NULL)
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{
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fread(scd.bram, 0x2000, 1, fp);
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fclose(fp);
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/* update CRC */
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brm_crc[0] = crc32(0, scd.bram, 0x2000);
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}
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else
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{
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/* force internal backup RAM format (does not use previous region backup RAM) */
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scd.bram[0x1fff] = 0;
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}
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/* check if internal backup RAM is correctly formatted */
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if (memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20))
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{
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/* clear internal backup RAM */
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memset(scd.bram, 0x00, 0x2000 - 0x40);
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/* internal Backup RAM size fields */
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brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = 0x00;
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brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (sizeof(scd.bram) / 64) - 3;
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/* format internal backup RAM */
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memcpy(scd.bram + 0x2000 - 0x40, brm_format, 0x40);
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/* clear CRC to force file saving (in case previous region backup RAM was also formatted) */
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brm_crc[0] = 0;
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}
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/* automatically load cartridge backup RAM (if enabled) */
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if (scd.cartridge.id)
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{
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fp = fopen(CART_BRAM, "rb");
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if (fp != NULL)
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{
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int filesize = scd.cartridge.mask + 1;
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int done = 0;
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/* Read into buffer (2k blocks) */
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while (filesize > CHUNKSIZE)
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{
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fread(scd.cartridge.area + done, CHUNKSIZE, 1, fp);
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done += CHUNKSIZE;
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filesize -= CHUNKSIZE;
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}
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/* Read remaining bytes */
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if (filesize)
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{
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fread(scd.cartridge.area + done, filesize, 1, fp);
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}
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/* close file */
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fclose(fp);
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/* update CRC */
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brm_crc[1] = crc32(0, scd.cartridge.area, scd.cartridge.mask + 1);
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}
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/* check if cartridge backup RAM is correctly formatted */
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if (memcmp(scd.cartridge.area + scd.cartridge.mask + 1 - 0x20, brm_format + 0x20, 0x20))
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{
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/* clear cartridge backup RAM */
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memset(scd.cartridge.area, 0x00, scd.cartridge.mask + 1);
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/* Cartridge Backup RAM size fields */
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brm_format[0x10] = brm_format[0x12] = brm_format[0x14] = brm_format[0x16] = (((scd.cartridge.mask + 1) / 64) - 3) >> 8;
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brm_format[0x11] = brm_format[0x13] = brm_format[0x15] = brm_format[0x17] = (((scd.cartridge.mask + 1) / 64) - 3) & 0xff;
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/* format cartridge backup RAM */
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memcpy(scd.cartridge.area + scd.cartridge.mask + 1 - 0x40, brm_format, 0x40);
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}
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}
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}
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static void bram_save(void)
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{
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FILE *fp;
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/* verify that internal backup RAM has been modified */
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if (crc32(0, scd.bram, 0x2000) != brm_crc[0])
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{
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/* check if it is correctly formatted before saving */
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if (!memcmp(scd.bram + 0x2000 - 0x20, brm_format + 0x20, 0x20))
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{
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switch (region_code)
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{
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case REGION_JAPAN_NTSC:
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fp = fopen(CD_BRAM_JP, "wb");
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break;
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case REGION_EUROPE:
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fp = fopen(CD_BRAM_EU, "wb");
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break;
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case REGION_USA:
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fp = fopen(CD_BRAM_US, "wb");
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break;
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default:
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return;
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}
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if (fp != NULL)
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{
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fwrite(scd.bram, 0x2000, 1, fp);
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fclose(fp);
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/* update CRC */
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brm_crc[0] = crc32(0, scd.bram, 0x2000);
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}
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}
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}
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/* verify that cartridge backup RAM has been modified */
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if (scd.cartridge.id && (crc32(0, scd.cartridge.area, scd.cartridge.mask + 1) != brm_crc[1]))
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{
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/* check if it is correctly formatted before saving */
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if (!memcmp(scd.cartridge.area + scd.cartridge.mask + 1 - 0x20, brm_format + 0x20, 0x20))
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{
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fp = fopen(CART_BRAM, "wb");
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if (fp != NULL)
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{
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int filesize = scd.cartridge.mask + 1;
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int done = 0;
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/* Write to file (2k blocks) */
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while (filesize > CHUNKSIZE)
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{
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fwrite(scd.cartridge.area + done, CHUNKSIZE, 1, fp);
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done += CHUNKSIZE;
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filesize -= CHUNKSIZE;
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}
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/* Write remaining bytes */
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if (filesize)
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{
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fwrite(scd.cartridge.area + done, filesize, 1, fp);
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}
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/* Close file */
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fclose(fp);
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/* update CRC */
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brm_crc[1] = crc32(0, scd.cartridge.area, scd.cartridge.mask + 1);
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}
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}
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}
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}
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/************************************
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* libretro implementation
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************************************/
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static struct retro_system_av_info g_av_info;
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void retro_get_system_info(struct retro_system_info *info)
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{
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info->library_name = "Genesis Plus GX";
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info->library_version = "v1.7.3";
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info->valid_extensions = "md|smd|bin|cue|gen|iso|sms|gg|sg";
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info->block_extract = false;
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info->need_fullpath = true;
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}
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void retro_get_system_av_info(struct retro_system_av_info *info)
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{
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*info = g_av_info;
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}
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void retro_set_controller_port_device(unsigned port, unsigned device)
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{
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(void)port;
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(void)device;
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}
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size_t retro_serialize_size(void) { return STATE_SIZE; }
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bool retro_serialize(void *data, size_t size)
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{
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if (size != STATE_SIZE)
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return FALSE;
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state_save(data);
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return TRUE;
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}
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bool retro_unserialize(const void *data, size_t size)
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{
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if (size != STATE_SIZE)
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return FALSE;
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state_load((uint8_t*)data);
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return TRUE;
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}
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void retro_cheat_reset(void) {}
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void retro_cheat_set(unsigned index, bool enabled, const char *code)
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{
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(void)index;
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|
(void)enabled;
|
|
(void)code;
|
|
}
|
|
|
|
static void extract_directory(char *buf, const char *path, size_t size)
|
|
{
|
|
char *base;
|
|
strncpy(buf, path, size - 1);
|
|
buf[size - 1] = '\0';
|
|
|
|
base = strrchr(buf, '/');
|
|
if (!base)
|
|
base = strrchr(buf, '\\');
|
|
|
|
if (base)
|
|
*base = '\0';
|
|
else
|
|
buf[0] = '\0';
|
|
}
|
|
|
|
static void retro_set_viewport_dimensions(void)
|
|
{
|
|
unsigned i;
|
|
struct retro_game_geometry geom;
|
|
struct retro_system_timing timing;
|
|
|
|
/* HACK: Emulate 10 dummy frames to figure out the real viewport dimensions of the game. */
|
|
if((system_hw & SYSTEM_PBC) == SYSTEM_MD || (system_hw & SYSTEM_PBC) == SYSTEM_MCD)
|
|
for (i = 0; i < 10; i++)
|
|
system_frame_gen(0);
|
|
else
|
|
for (i = 0; i < 10; i++)
|
|
system_frame_sms(0);
|
|
|
|
vwidth = bitmap.viewport.w + (bitmap.viewport.x * 2);
|
|
vheight = bitmap.viewport.h + (bitmap.viewport.y * 2);
|
|
|
|
retro_reset();
|
|
|
|
if (config.ntsc)
|
|
{
|
|
if (system_hw & SYSTEM_MD)
|
|
vwidth = MD_NTSC_OUT_WIDTH(vwidth);
|
|
else
|
|
vwidth = SMS_NTSC_OUT_WIDTH(vwidth);
|
|
}
|
|
|
|
geom.aspect_ratio = 4.0 / 3.0;
|
|
geom.base_width = vwidth;
|
|
geom.base_height = vheight;
|
|
geom.max_width = 1024;
|
|
geom.max_height = 512;
|
|
|
|
timing.sample_rate = 44100;
|
|
|
|
if (vdp_pal)
|
|
timing.fps = pal_fps;
|
|
else
|
|
timing.fps = ntsc_fps;
|
|
|
|
g_av_info.geometry = geom;
|
|
g_av_info.timing = timing;
|
|
}
|
|
|
|
static bool LoadFile(char * filename)
|
|
{
|
|
int size = 0;
|
|
|
|
/* check if virtual CD tray was open */
|
|
if ((system_hw == SYSTEM_MCD) && (cdd.status == CD_OPEN))
|
|
{
|
|
/* swap CD image file */
|
|
size = cdd_load(filename, (char *)(cdc.ram));
|
|
|
|
/* update CD header information */
|
|
if (!scd.cartridge.boot)
|
|
getrominfo((char *)(cdc.ram));
|
|
}
|
|
|
|
/* no CD image file loaded */
|
|
if (!size)
|
|
{
|
|
/* close CD tray to force system reset */
|
|
cdd.status = NO_DISC;
|
|
|
|
/* load game file */
|
|
size = load_rom(filename);
|
|
}
|
|
|
|
return size > 0;
|
|
}
|
|
|
|
static void check_variables(void)
|
|
{
|
|
bool update_viewports = false;
|
|
static bool last_ntsc_val_same;
|
|
struct retro_variable var = {0};
|
|
|
|
var.key = "blargg_ntsc_filter";
|
|
|
|
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var))
|
|
{
|
|
unsigned orig_value = config.ntsc;
|
|
|
|
update_viewports = true;
|
|
|
|
if (strcmp(var.value, "disabled") == 0)
|
|
config.ntsc = 0;
|
|
else if (strcmp(var.value, "monochrome") == 0)
|
|
{
|
|
config.ntsc = 1;
|
|
sms_ntsc_init(sms_ntsc, &sms_ntsc_monochrome);
|
|
md_ntsc_init(md_ntsc, &md_ntsc_monochrome);
|
|
}
|
|
else if (strcmp(var.value, "composite") == 0)
|
|
{
|
|
config.ntsc = 1;
|
|
sms_ntsc_init(sms_ntsc, &sms_ntsc_composite);
|
|
md_ntsc_init(md_ntsc, &md_ntsc_composite);
|
|
}
|
|
else if (strcmp(var.value, "svideo") == 0)
|
|
{
|
|
config.ntsc = 1;
|
|
sms_ntsc_init(sms_ntsc, &sms_ntsc_svideo);
|
|
md_ntsc_init(md_ntsc, &md_ntsc_svideo);
|
|
}
|
|
else if (strcmp(var.value, "rgb") == 0)
|
|
{
|
|
config.ntsc = 1;
|
|
sms_ntsc_init(sms_ntsc, &sms_ntsc_rgb);
|
|
md_ntsc_init(md_ntsc, &md_ntsc_rgb);
|
|
}
|
|
|
|
if (orig_value != config.ntsc)
|
|
update_viewports = true;
|
|
}
|
|
|
|
var.key = "overscan";
|
|
|
|
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var))
|
|
{
|
|
unsigned orig_value = config.overscan;
|
|
|
|
if (strcmp(var.value, "0") == 0)
|
|
config.overscan = 0;
|
|
else if (strcmp(var.value, "1") == 0)
|
|
config.overscan = 1;
|
|
else if (strcmp(var.value, "2") == 0)
|
|
config.overscan = 2;
|
|
else if (strcmp(var.value, "3") == 0)
|
|
config.overscan = 3;
|
|
|
|
if (orig_value != config.overscan)
|
|
update_viewports = true;
|
|
}
|
|
|
|
var.key = "gg_extra";
|
|
|
|
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var))
|
|
{
|
|
unsigned orig_value = config.gg_extra;
|
|
|
|
if (strcmp(var.value, "disabled") == 0)
|
|
config.gg_extra = 0;
|
|
else if (strcmp(var.value, "enabled") == 0)
|
|
config.gg_extra = 1;
|
|
|
|
if (orig_value != config.gg_extra)
|
|
update_viewports = true;
|
|
}
|
|
|
|
if (update_viewports)
|
|
retro_set_viewport_dimensions();
|
|
}
|
|
|
|
bool retro_load_game(const struct retro_game_info *info)
|
|
{
|
|
const char *full_path;
|
|
const char *dir;
|
|
char slash;
|
|
|
|
extract_directory(g_rom_dir, info->path, sizeof(g_rom_dir));
|
|
|
|
if (!environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) || !dir)
|
|
{
|
|
fprintf(stderr, "[genplus]: Defaulting system directory to %s.\n", g_rom_dir);
|
|
dir = g_rom_dir;
|
|
}
|
|
#if defined(_WIN32)
|
|
slash = '\\';
|
|
#else
|
|
slash = '/';
|
|
#endif
|
|
|
|
snprintf(CD_BIOS_EU, sizeof(CD_BIOS_EU), "%s%cbios_CD_E.bin", dir, slash);
|
|
snprintf(CD_BIOS_US, sizeof(CD_BIOS_US), "%s%cbios_CD_U.bin", dir, slash);
|
|
snprintf(CD_BIOS_JP, sizeof(CD_BIOS_JP), "%s%cbios_CD_J.bin", dir, slash);
|
|
snprintf(CD_BRAM_EU, sizeof(CD_BRAM_EU), "%s%cscd_E.brm", dir, slash);
|
|
snprintf(CD_BRAM_US, sizeof(CD_BRAM_US), "%s%cscd_U.brm", dir, slash);
|
|
snprintf(CD_BRAM_JP, sizeof(CD_BRAM_JP), "%s%cscd_J.brm", dir, slash);
|
|
snprintf(CART_BRAM, sizeof(CART_BRAM), "%s%ccart.brm", dir, slash);
|
|
fprintf(stderr, "Sega CD EU BIOS should be located at: %s\n", CD_BIOS_EU);
|
|
fprintf(stderr, "Sega CD US BIOS should be located at: %s\n", CD_BIOS_US);
|
|
fprintf(stderr, "Sega CD JP BIOS should be located at: %s\n", CD_BIOS_JP);
|
|
fprintf(stderr, "Sega CD EU BRAM is located at: %s\n", CD_BRAM_EU);
|
|
fprintf(stderr, "Sega CD US BRAM is located at: %s\n", CD_BRAM_US);
|
|
fprintf(stderr, "Sega CD JP BRAM is located at: %s\n", CD_BRAM_JP);
|
|
fprintf(stderr, "Sega CD RAM CART is located at: %s\n", CART_BRAM);
|
|
|
|
snprintf(DEFAULT_PATH, sizeof(DEFAULT_PATH), g_rom_dir);
|
|
|
|
config_default();
|
|
init_bitmap();
|
|
|
|
full_path = info->path;
|
|
|
|
if (!LoadFile((char *)full_path))
|
|
return false;
|
|
|
|
configure_controls();
|
|
|
|
init_audio();
|
|
|
|
system_init();
|
|
system_reset();
|
|
|
|
if (system_hw == SYSTEM_MCD)
|
|
bram_load();
|
|
|
|
retro_set_viewport_dimensions();
|
|
|
|
check_variables();
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
|
|
{
|
|
(void)game_type;
|
|
(void)info;
|
|
(void)num_info;
|
|
return FALSE;
|
|
}
|
|
|
|
void retro_unload_game(void)
|
|
{
|
|
if (system_hw == SYSTEM_MCD)
|
|
bram_save();
|
|
}
|
|
|
|
unsigned retro_get_region(void) { return vdp_pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC; }
|
|
|
|
void *retro_get_memory_data(unsigned id)
|
|
{
|
|
if (!sram.on)
|
|
return NULL;
|
|
|
|
switch (id)
|
|
{
|
|
case RETRO_MEMORY_SAVE_RAM:
|
|
return sram.sram;
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
size_t retro_get_memory_size(unsigned id)
|
|
{
|
|
if (!sram.on)
|
|
return 0;
|
|
|
|
switch (id)
|
|
{
|
|
case RETRO_MEMORY_SAVE_RAM:
|
|
return 0x10000;
|
|
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
void retro_init(void)
|
|
{
|
|
unsigned level, rgb565;
|
|
sms_ntsc = calloc(1, sizeof(sms_ntsc_t));
|
|
md_ntsc = calloc(1, sizeof(md_ntsc_t));
|
|
|
|
level = 1;
|
|
environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
|
|
|
|
#ifdef FRONTEND_SUPPORTS_RGB565
|
|
rgb565 = RETRO_PIXEL_FORMAT_RGB565;
|
|
if(environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &rgb565))
|
|
fprintf(stderr, "Frontend supports RGB565 - will use that instead of XRGB1555.\n");
|
|
#endif
|
|
}
|
|
|
|
void retro_deinit(void)
|
|
{
|
|
audio_shutdown();
|
|
free(md_ntsc);
|
|
free(sms_ntsc);
|
|
}
|
|
|
|
void retro_reset(void) { system_reset(); }
|
|
|
|
int16 soundbuffer[3068];
|
|
|
|
void osd_input_update(void)
|
|
{
|
|
unsigned res[MAX_INPUTS], i, j;
|
|
|
|
for(i = 0; i < MAX_INPUTS; i++)
|
|
res[i] = 0;
|
|
|
|
if (!input_poll_cb)
|
|
return;
|
|
|
|
input_poll_cb();
|
|
|
|
switch (input.system[0])
|
|
{
|
|
case SYSTEM_MS_GAMEPAD:
|
|
case SYSTEM_MD_GAMEPAD:
|
|
if(input.dev[0] != NO_DEVICE)
|
|
{
|
|
for (j = 0; j < sizeof(binds) / sizeof(binds[0]); j++)
|
|
{
|
|
if (input_state_cb(0, RETRO_DEVICE_JOYPAD, 0, binds[j].retro))
|
|
res[0] |= binds[j].genesis;
|
|
}
|
|
|
|
input.pad[0] = res[0];
|
|
}
|
|
break;
|
|
case SYSTEM_MOUSE:
|
|
break;
|
|
case SYSTEM_ACTIVATOR:
|
|
break;
|
|
case SYSTEM_XE_A1P:
|
|
break;
|
|
case SYSTEM_WAYPLAY:
|
|
break;
|
|
case SYSTEM_TEAMPLAYER:
|
|
break;
|
|
case SYSTEM_LIGHTPHASER:
|
|
break;
|
|
case SYSTEM_PADDLE:
|
|
break;
|
|
case SYSTEM_SPORTSPAD:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
|
|
switch (input.system[1])
|
|
{
|
|
case SYSTEM_MS_GAMEPAD:
|
|
case SYSTEM_MD_GAMEPAD:
|
|
if(input.dev[4] != NO_DEVICE)
|
|
{
|
|
for (j = 0; j < sizeof(binds) / sizeof(binds[0]); j++)
|
|
{
|
|
if (input_state_cb(1, RETRO_DEVICE_JOYPAD, 0, binds[j].retro))
|
|
res[1] |= binds[j].genesis;
|
|
input.pad[4] = res[1];
|
|
}
|
|
}
|
|
break;
|
|
case SYSTEM_MOUSE:
|
|
break;
|
|
case SYSTEM_ACTIVATOR:
|
|
break;
|
|
case SYSTEM_XE_A1P:
|
|
break;
|
|
case SYSTEM_TEAMPLAYER:
|
|
break;
|
|
case SYSTEM_LIGHTPHASER:
|
|
break;
|
|
case SYSTEM_PADDLE:
|
|
break;
|
|
case SYSTEM_SPORTSPAD:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (cart.special & HW_J_CART)
|
|
{
|
|
for(i = 5; i < 7; i++)
|
|
{
|
|
for (j = 0; j < sizeof(binds) / sizeof(binds[0]); j++)
|
|
{
|
|
if (input_state_cb(i-3, RETRO_DEVICE_JOYPAD, 0, binds[j].retro))
|
|
res[i-3] |= binds[j].genesis;
|
|
input.pad[i] = res[i-3];
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
void retro_run(void)
|
|
{
|
|
int aud;
|
|
bool updated = false;
|
|
|
|
if (system_hw == SYSTEM_MCD)
|
|
system_frame_scd(0);
|
|
else if ((system_hw & SYSTEM_PBC) == SYSTEM_MD)
|
|
system_frame_gen(0);
|
|
else
|
|
system_frame_sms(0);
|
|
|
|
video_cb(bitmap.data, config.ntsc ? vwidth : (bitmap.viewport.w + (bitmap.viewport.x * 2)), bitmap.viewport.h + (bitmap.viewport.y * 2), bitmap.pitch);
|
|
|
|
aud = audio_update(soundbuffer) << 1;
|
|
audio_batch_cb(soundbuffer, aud >> 1);
|
|
|
|
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
|
|
check_variables();
|
|
}
|
|
|