2 * libretro core glue for PicoDrive
5 * This work is licensed under the terms of MAME license.
6 * See COPYING file in the top-level directory.
9 #define _GNU_SOURCE 1 // mremap
20 #include <sys/types.h>
24 #include <libkern/OSCacheControl.h>
28 #include "3ds/3ds_utils.h"
33 int svcDuplicateHandle(unsigned int* out, unsigned int original);
34 int svcCloseHandle(unsigned int handle);
35 int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
36 unsigned int size, unsigned int type, unsigned int perm);
37 void* linearMemAlign(size_t size, size_t alignment);
38 void linearFree(void* mem);
40 static int ctr_svchack_successful = 0;
43 #include <pico/pico_int.h>
44 #include <pico/state.h>
45 #include "../common/input_pico.h"
46 #include "../common/version.h"
49 static retro_log_printf_t log_cb;
50 static retro_video_refresh_t video_cb;
51 static retro_input_poll_t input_poll_cb;
52 static retro_input_state_t input_state_cb;
53 static retro_environment_t environ_cb;
54 static retro_audio_sample_batch_t audio_batch_cb;
56 #define VOUT_MAX_WIDTH 320
57 #define VOUT_MAX_HEIGHT 240
59 static const float VOUT_PAR = 0.0;
60 static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
61 static const float VOUT_CRT = (224.0f * 1.29911f);
63 static void *vout_buf;
64 static int vout_width, vout_height, vout_offset;
65 static float user_vout_width = 0.0;
68 static short sndBuffer[2*44100/50];
70 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
73 static void snd_write(int len);
81 /* functions called by the core */
83 void cache_flush_d_inval_i(void *start, void *end)
86 #if defined(__BLACKBERRY_QNX__)
87 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
88 #elif defined(__MACH__)
89 size_t len = (char *)end - (char *)start;
90 sys_dcache_flush(start, len);
91 sys_icache_invalidate(start, len);
93 ctr_flush_invalidate_cache();
95 __clear_cache(start, end);
101 /* mmap() replacement for Windows
103 * Author: Mike Frysinger <vapier@gentoo.org>
104 * Placed into the public domain
108 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
109 * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
110 * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
111 * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
114 #define PROT_READ 0x1
115 #define PROT_WRITE 0x2
116 /* This flag is only available in WinXP+ */
117 #ifdef FILE_MAP_EXECUTE
118 #define PROT_EXEC 0x4
120 #define PROT_EXEC 0x0
121 #define FILE_MAP_EXECUTE 0
124 #define MAP_SHARED 0x01
125 #define MAP_PRIVATE 0x02
126 #define MAP_ANONYMOUS 0x20
127 #define MAP_ANON MAP_ANONYMOUS
128 #define MAP_FAILED ((void *) -1)
130 #ifdef __USE_FILE_OFFSET64
131 # define DWORD_HI(x) (x >> 32)
132 # define DWORD_LO(x) ((x) & 0xffffffff)
134 # define DWORD_HI(x) (0)
135 # define DWORD_LO(x) (x)
138 static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
140 uint32_t flProtect, dwDesiredAccess;
145 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
148 if (!(flags & MAP_ANON) || offset)
150 } else if (flags & MAP_ANON)
153 if (prot & PROT_WRITE) {
154 if (prot & PROT_EXEC)
155 flProtect = PAGE_EXECUTE_READWRITE;
157 flProtect = PAGE_READWRITE;
158 } else if (prot & PROT_EXEC) {
159 if (prot & PROT_READ)
160 flProtect = PAGE_EXECUTE_READ;
161 else if (prot & PROT_EXEC)
162 flProtect = PAGE_EXECUTE;
164 flProtect = PAGE_READONLY;
166 end = length + offset;
169 mmap_fd = INVALID_HANDLE_VALUE;
171 mmap_fd = (HANDLE)_get_osfhandle(fd);
172 h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
176 if (prot & PROT_WRITE)
177 dwDesiredAccess = FILE_MAP_WRITE;
179 dwDesiredAccess = FILE_MAP_READ;
180 if (prot & PROT_EXEC)
181 dwDesiredAccess |= FILE_MAP_EXECUTE;
182 if (flags & MAP_PRIVATE)
183 dwDesiredAccess |= FILE_MAP_COPY;
184 ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
192 static void munmap(void *addr, size_t length)
194 UnmapViewOfFile(addr);
195 /* ruh-ro, we leaked handle from CreateFileMapping() ... */
197 #elif defined(NO_MMAP)
198 #define PROT_EXEC 0x04
202 #define MAP_PRIVATE 0
203 #define MAP_ANONYMOUS 0
205 void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
210 void munmap(void *base_addr, size_t len)
215 int mprotect(void *addr, size_t len, int prot)
217 /* stub - not really needed at this point since this codepath has no dynarecs */
223 #ifndef MAP_ANONYMOUS
224 #define MAP_ANONYMOUS MAP_ANON
230 unsigned int requested_map;
234 pico_mmap_t pico_mmaps[] = {
240 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
244 if (ctr_svchack_successful)
246 pico_mmap_t* pico_mmap;
248 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
250 if ((pico_mmap->requested_map == addr))
252 unsigned int ptr_aligned, tmp;
253 unsigned int currentHandle;
254 unsigned int perm = 0b011;
259 size = (size + 0xFFF) & ~0xFFF;
260 pico_mmap->buffer = malloc(size + 0x1000);
261 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
263 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
265 if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
268 log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
272 svcCloseHandle(currentHandle);
273 return (void*)pico_mmap->requested_map;
281 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
283 if (ctr_svchack_successful)
285 pico_mmap_t* pico_mmap;
287 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
289 if ((pico_mmap->requested_map == (unsigned int)ptr))
291 unsigned int ptr_aligned;
292 unsigned int currentHandle;
295 oldsize = (oldsize + 0xFFF) & ~0xFFF;
296 newsize = (newsize + 0xFFF) & ~0xFFF;
297 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
299 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
301 svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
303 tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
307 pico_mmap->buffer = tmp;
308 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
310 svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
312 svcCloseHandle(currentHandle);
319 return realloc(ptr, newsize);
322 void plat_munmap(void *ptr, size_t size)
324 if (ctr_svchack_successful)
326 pico_mmap_t* pico_mmap;
328 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
330 if ((pico_mmap->requested_map == (unsigned int)ptr))
332 unsigned int ptr_aligned;
333 unsigned int currentHandle;
335 size = (size + 0xFFF) & ~0xFFF;
336 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
338 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
340 svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
342 svcCloseHandle(currentHandle);
344 free(pico_mmap->buffer);
345 pico_mmap->buffer = NULL;
355 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
357 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
361 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
362 if (ret == MAP_FAILED) {
364 log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
368 if (addr != 0 && ret != (void *)addr) {
370 log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
382 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
385 void *ret = mremap(ptr, oldsize, newsize, 0);
386 if (ret == MAP_FAILED)
392 size_t preserve_size;
394 preserve_size = oldsize;
395 if (preserve_size > newsize)
396 preserve_size = newsize;
397 tmp = malloc(preserve_size);
400 memcpy(tmp, ptr, preserve_size);
402 munmap(ptr, oldsize);
403 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
404 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
405 if (ret == MAP_FAILED) {
409 memcpy(ret, tmp, preserve_size);
415 void plat_munmap(void *ptr, size_t size)
422 int plat_mem_set_exec(void *ptr, size_t size)
425 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
426 if (ret == 0 && log_cb)
427 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
430 if (ctr_svchack_successful)
432 unsigned int currentHandle;
433 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
434 ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
435 size, MEMOP_PROT, 0b111);
436 svcCloseHandle(currentHandle);
437 ctr_flush_invalidate_cache();
443 log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
449 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
450 if (ret != 0 && log_cb)
451 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
456 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
458 memset(vout_buf, 0, 320 * 240 * 2);
459 vout_width = is_32cols ? 256 : 320;
460 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
462 vout_height = line_count;
463 vout_offset = vout_width * start_line;
465 // Update the geometry
466 struct retro_system_av_info av_info;
467 retro_get_system_av_info(&av_info);
468 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
471 void emu_32x_startup(void)
475 void lprintf(const char *fmt, ...)
480 vsprintf(buffer, fmt, ap);
481 /* TODO - add 'level' param for warning/error messages? */
483 log_cb(RETRO_LOG_INFO, "%s", buffer);
488 void retro_set_environment(retro_environment_t cb)
490 static const struct retro_variable vars[] = {
491 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
492 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
493 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
494 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
495 { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
496 { "picodrive_region_fps", "Region FPS; Auto|NTSC|PAL" },
497 { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" },
499 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
506 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
509 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
510 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
511 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
512 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
513 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
515 unsigned retro_api_version(void)
517 return RETRO_API_VERSION;
520 void retro_set_controller_port_device(unsigned port, unsigned device)
524 void retro_get_system_info(struct retro_system_info *info)
526 memset(info, 0, sizeof(*info));
527 info->library_name = "PicoDrive";
528 info->library_version = VERSION;
529 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
530 info->need_fullpath = true;
533 void retro_get_system_av_info(struct retro_system_av_info *info)
535 memset(info, 0, sizeof(*info));
536 info->timing.fps = Pico.m.pal ? 50 : 60;
537 info->timing.sample_rate = 44100;
538 info->geometry.base_width = vout_width;
539 info->geometry.base_height = vout_height;
540 info->geometry.max_width = vout_width;
541 info->geometry.max_height = vout_height;
543 float common_width = vout_width;
544 if (user_vout_width != 0)
545 common_width = user_vout_width;
547 info->geometry.aspect_ratio = common_width / vout_height;
551 struct savestate_state {
552 const char *load_buf;
558 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
560 struct savestate_state *state = file;
561 size_t bsize = size * nmemb;
563 if (state->pos + bsize > state->size) {
565 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
566 state->pos + bsize, state->size);
567 bsize = state->size - state->pos;
572 memcpy(p, state->load_buf + state->pos, bsize);
577 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
579 struct savestate_state *state = file;
580 size_t bsize = size * nmemb;
582 if (state->pos + bsize > state->size) {
584 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
585 state->pos + bsize, state->size);
586 bsize = state->size - state->pos;
591 memcpy(state->save_buf + state->pos, p, bsize);
596 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
598 struct savestate_state *state = file;
599 size_t bsize = size * nmemb;
605 size_t state_eof(void *file)
607 struct savestate_state *state = file;
609 return state->pos >= state->size;
612 int state_fseek(void *file, long offset, int whence)
614 struct savestate_state *state = file;
621 state->pos += offset;
624 state->pos = state->size + offset;
627 return (int)state->pos;
630 /* savestate sizes vary wildly depending if cd/32x or
631 * carthw is active, so run the whole thing to get size */
632 size_t retro_serialize_size(void)
634 struct savestate_state state = { 0, };
637 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
644 bool retro_serialize(void *data, size_t size)
646 struct savestate_state state = { 0, };
649 state.save_buf = data;
653 ret = PicoStateFP(&state, 1, NULL, state_write,
658 bool retro_unserialize(const void *data, size_t size)
660 struct savestate_state state = { 0, };
663 state.load_buf = data;
667 ret = PicoStateFP(&state, 0, state_read, NULL,
668 state_eof, state_fseek);
673 void retro_cheat_reset(void)
677 void retro_cheat_set(unsigned index, bool enabled, const char *code)
681 /* multidisk support */
682 static bool disk_ejected;
683 static unsigned int disk_current_index;
684 static unsigned int disk_count;
685 static struct disks_state {
689 static bool disk_set_eject_state(bool ejected)
692 disk_ejected = ejected;
696 static bool disk_get_eject_state(void)
701 static unsigned int disk_get_image_index(void)
703 return disk_current_index;
706 static bool disk_set_image_index(unsigned int index)
708 enum cd_img_type cd_type;
711 if (index >= sizeof(disks) / sizeof(disks[0]))
714 if (disks[index].fname == NULL) {
716 log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
718 // RetroArch specifies "no disk" with index == count,
719 // so don't fail here..
720 disk_current_index = index;
725 log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
729 cd_type = PicoCdCheck(disks[index].fname, NULL);
730 if (cd_type != CIT_NOT_CD)
731 ret = cdd_load(disks[index].fname, cd_type);
734 log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
738 disk_current_index = index;
742 static unsigned int disk_get_num_images(void)
747 static bool disk_replace_image_index(unsigned index,
748 const struct retro_game_info *info)
752 if (index >= sizeof(disks) / sizeof(disks[0]))
755 if (disks[index].fname != NULL)
756 free(disks[index].fname);
757 disks[index].fname = NULL;
760 disks[index].fname = strdup(info->path);
761 if (index == disk_current_index)
762 ret = disk_set_image_index(index);
768 static bool disk_add_image_index(void)
770 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
777 static struct retro_disk_control_callback disk_control = {
778 disk_set_eject_state,
779 disk_get_eject_state,
780 disk_get_image_index,
781 disk_set_image_index,
783 disk_replace_image_index,
784 disk_add_image_index,
787 static void disk_tray_open(void)
790 log_cb(RETRO_LOG_INFO, "cd tray open\n");
794 static void disk_tray_close(void)
797 log_cb(RETRO_LOG_INFO, "cd tray close\n");
802 static const char * const biosfiles_us[] = {
803 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
805 static const char * const biosfiles_eu[] = {
806 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
808 static const char * const biosfiles_jp[] = {
809 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
812 static void make_system_path(char *buf, size_t buf_size,
813 const char *name, const char *ext)
815 const char *dir = NULL;
817 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
818 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
821 snprintf(buf, buf_size, "%s%s", name, ext);
825 static const char *find_bios(int *region, const char *cd_fname)
827 const char * const *files;
828 static char path[256];
832 if (*region == 4) { // US
833 files = biosfiles_us;
834 count = sizeof(biosfiles_us) / sizeof(char *);
835 } else if (*region == 8) { // EU
836 files = biosfiles_eu;
837 count = sizeof(biosfiles_eu) / sizeof(char *);
838 } else if (*region == 1 || *region == 2) {
839 files = biosfiles_jp;
840 count = sizeof(biosfiles_jp) / sizeof(char *);
845 for (i = 0; i < count; i++)
847 make_system_path(path, sizeof(path), files[i], ".bin");
848 f = fopen(path, "rb");
852 make_system_path(path, sizeof(path), files[i], ".zip");
853 f = fopen(path, "rb");
860 log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
868 bool retro_load_game(const struct retro_game_info *info)
870 enum media_type_e media_type;
871 static char carthw_path[256];
874 struct retro_input_descriptor desc[] = {
875 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
876 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
877 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
878 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
879 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
880 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
881 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
882 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
883 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
884 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
885 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
886 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
888 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
889 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
890 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
891 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
892 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
893 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
894 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
895 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
896 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
897 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
898 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
899 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
904 struct retro_input_descriptor desc_sms[] = {
905 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
906 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
907 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
908 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
909 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
910 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
911 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
913 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
914 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
915 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
916 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
917 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
918 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
919 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
924 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
925 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
927 log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
931 if (info == NULL || info->path == NULL) {
933 log_cb(RETRO_LOG_ERROR, "info->path required\n");
937 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
938 if (disks[i].fname != NULL) {
939 free(disks[i].fname);
940 disks[i].fname = NULL;
944 disk_current_index = 0;
946 disks[0].fname = strdup(info->path);
948 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
950 media_type = PicoLoadMedia(info->path, carthw_path,
953 switch (media_type) {
956 log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
960 log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
962 case PM_BAD_CD_NO_BIOS:
964 log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
968 log_cb(RETRO_LOG_ERROR, "Load error\n");
974 if (media_type == PM_MARK3)
975 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
977 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
981 PicoWriteSound = snd_write;
982 memset(sndBuffer, 0, sizeof(sndBuffer));
989 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
994 void retro_unload_game(void)
998 unsigned retro_get_region(void)
1000 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
1003 void *retro_get_memory_data(unsigned type)
1009 case RETRO_MEMORY_SAVE_RAM:
1010 if (PicoAHW & PAHW_MCD)
1011 data = Pico_mcd->bram;
1015 case RETRO_MEMORY_SYSTEM_RAM:
1016 if (PicoAHW & PAHW_SMS)
1029 size_t retro_get_memory_size(unsigned type)
1036 case RETRO_MEMORY_SAVE_RAM:
1037 if (PicoAHW & PAHW_MCD)
1041 if (Pico.m.frame_count == 0)
1044 // if game doesn't write to sram, don't report it to
1045 // libretro so that RA doesn't write out zeroed .srm
1046 for (i = 0, sum = 0; i < SRam.size; i++)
1047 sum |= SRam.data[i];
1049 return (sum != 0) ? SRam.size : 0;
1051 case RETRO_MEMORY_SYSTEM_RAM:
1052 if (PicoAHW & PAHW_SMS)
1053 return sizeof(Pico.vramb);
1055 return sizeof(Pico.ram);
1063 void retro_reset(void)
1068 static const unsigned short retro_pico_map[] = {
1082 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
1084 static void snd_write(int len)
1086 audio_batch_cb(PsndOut, len / 4);
1089 static enum input_device input_name_to_val(const char *name)
1091 if (strcmp(name, "3 button pad") == 0)
1092 return PICO_INPUT_PAD_3BTN;
1093 if (strcmp(name, "6 button pad") == 0)
1094 return PICO_INPUT_PAD_6BTN;
1095 if (strcmp(name, "None") == 0)
1096 return PICO_INPUT_NOTHING;
1099 log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
1100 return PICO_INPUT_PAD_3BTN;
1103 static void update_variables(void)
1105 struct retro_variable var;
1108 var.key = "picodrive_input1";
1109 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1110 PicoSetInputDevice(0, input_name_to_val(var.value));
1113 var.key = "picodrive_input2";
1114 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1115 PicoSetInputDevice(1, input_name_to_val(var.value));
1118 var.key = "picodrive_sprlim";
1119 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1120 if (strcmp(var.value, "enabled") == 0)
1121 PicoOpt |= POPT_DIS_SPRITE_LIM;
1123 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
1127 var.key = "picodrive_ramcart";
1128 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1129 if (strcmp(var.value, "enabled") == 0)
1130 PicoOpt |= POPT_EN_MCD_RAMCART;
1132 PicoOpt &= ~POPT_EN_MCD_RAMCART;
1135 int OldPicoRegionOverride = PicoRegionOverride;
1137 var.key = "picodrive_region";
1138 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1139 if (strcmp(var.value, "Auto") == 0)
1140 PicoRegionOverride = 0;
1141 else if (strcmp(var.value, "Japan NTSC") == 0)
1142 PicoRegionOverride = 1;
1143 else if (strcmp(var.value, "Japan PAL") == 0)
1144 PicoRegionOverride = 2;
1145 else if (strcmp(var.value, "US") == 0)
1146 PicoRegionOverride = 4;
1147 else if (strcmp(var.value, "Europe") == 0)
1148 PicoRegionOverride = 8;
1151 int OldPicoRegionFPSOverride = PicoRegionFPSOverride;
1153 var.key = "picodrive_region_fps";
1154 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1155 if (strcmp(var.value, "Auto") == 0)
1156 PicoRegionFPSOverride = 0;
1157 else if (strcmp(var.value, "NTSC") == 0)
1158 PicoRegionFPSOverride = 1;
1159 else if (strcmp(var.value, "PAL") == 0)
1160 PicoRegionFPSOverride = 2;
1163 // Update region, fps and sound flags if needed
1164 if (PicoRegionOverride != OldPicoRegionOverride ||
1165 PicoRegionFPSOverride != OldPicoRegionFPSOverride)
1172 float old_user_vout_width = user_vout_width;
1174 var.key = "picodrive_aspect";
1175 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1176 if (strcmp(var.value, "4/3") == 0)
1177 user_vout_width = VOUT_4_3;
1178 else if (strcmp(var.value, "CRT") == 0)
1179 user_vout_width = VOUT_CRT;
1181 user_vout_width = VOUT_PAR;
1184 if (user_vout_width != old_user_vout_width)
1186 // Update the geometry
1187 struct retro_system_av_info av_info;
1188 retro_get_system_av_info(&av_info);
1189 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
1194 var.key = "picodrive_drc";
1195 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1196 if (strcmp(var.value, "enabled") == 0)
1197 PicoOpt |= POPT_EN_DRC;
1199 PicoOpt &= ~POPT_EN_DRC;
1203 if(!ctr_svchack_successful)
1204 PicoOpt &= ~POPT_EN_DRC;
1208 void retro_run(void)
1210 bool updated = false;
1213 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
1218 PicoPad[0] = PicoPad[1] = 0;
1219 for (pad = 0; pad < 2; pad++)
1220 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
1221 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
1222 PicoPad[pad] |= retro_pico_map[i];
1226 video_cb((short *)vout_buf + vout_offset,
1227 vout_width, vout_height, vout_width * 2);
1230 static void check_system_specs(void)
1232 /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */
1234 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1237 void retro_init(void)
1239 struct retro_log_callback log;
1243 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1245 if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
1250 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
1253 ctr_svchack_successful = ctr_svchack_init();
1256 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
1257 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
1258 | POPT_EN_32X|POPT_EN_PWM
1259 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
1262 if (ctr_svchack_successful)
1264 PicoOpt |= POPT_EN_DRC;
1267 PicoAutoRgnOrder = 0x184; // US, EU, JP
1272 vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
1274 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
1278 PicoDrawSetOutFormat(PDF_RGB555, 0);
1279 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
1281 //PicoMessage = plat_status_msg_busy_next;
1282 PicoMCDopenTray = disk_tray_open;
1283 PicoMCDcloseTray = disk_tray_close;
1288 void retro_deinit(void)
1291 linearFree(vout_buf);