2 * libretro core glue for PicoDrive
5 * (C) Daniel De Matteis, 2013
7 * This work is licensed under the terms of MAME license.
8 * See COPYING file in the top-level directory.
11 #define _GNU_SOURCE 1 // mremap
22 #include <sys/types.h>
26 #include <libkern/OSCacheControl.h>
30 #include "3ds/3ds_utils.h"
35 int svcDuplicateHandle(unsigned int* out, unsigned int original);
36 int svcCloseHandle(unsigned int handle);
37 int svcControlProcessMemory(unsigned int process, void* addr0, void* addr1,
38 unsigned int size, unsigned int type, unsigned int perm);
39 void* linearMemAlign(size_t size, size_t alignment);
40 void linearFree(void* mem);
42 static int ctr_svchack_successful = 0;
45 #define TARGET_SIZE_2 24 // 2^24 = 16 megabytes
47 #include <psp2/kernel/sysmem.h>
50 int _newlib_vm_size_user = 1 << TARGET_SIZE_2;
54 #include <pico/pico_int.h>
55 #include <pico/state.h>
56 #include "../common/input_pico.h"
57 #include "../common/version.h"
60 static retro_log_printf_t log_cb;
61 static retro_video_refresh_t video_cb;
62 static retro_input_poll_t input_poll_cb;
63 static retro_input_state_t input_state_cb;
64 static retro_environment_t environ_cb;
65 static retro_audio_sample_batch_t audio_batch_cb;
67 #define VOUT_MAX_WIDTH 320
68 #define VOUT_MAX_HEIGHT 240
70 static const float VOUT_PAR = 0.0;
71 static const float VOUT_4_3 = (224.0f * (4.0f / 3.0f));
72 static const float VOUT_CRT = (224.0f * 1.29911f);
74 static void *vout_buf;
75 static int vout_width, vout_height, vout_offset;
76 static float user_vout_width = 0.0;
79 static short sndBuffer[2*44100/50];
81 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
84 static void snd_write(int len);
92 /* functions called by the core */
94 void cache_flush_d_inval_i(void *start, void *end)
97 size_t len = (char *)end - (char *)start;
98 #if defined(__BLACKBERRY_QNX__)
99 msync(start, end - start, MS_SYNC | MS_CACHE_ONLY | MS_INVALIDATE_ICACHE);
100 #elif defined(__MACH__)
101 sys_dcache_flush(start, len);
102 sys_icache_invalidate(start, len);
104 ctr_flush_invalidate_cache();
106 sceKernelSyncVMDomain(sceBlock, start, len);
108 __clear_cache(start, end);
114 /* mmap() replacement for Windows
116 * Author: Mike Frysinger <vapier@gentoo.org>
117 * Placed into the public domain
121 * CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
122 * CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
123 * MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
124 * UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
127 #define PROT_READ 0x1
128 #define PROT_WRITE 0x2
129 /* This flag is only available in WinXP+ */
130 #ifdef FILE_MAP_EXECUTE
131 #define PROT_EXEC 0x4
133 #define PROT_EXEC 0x0
134 #define FILE_MAP_EXECUTE 0
137 #define MAP_SHARED 0x01
138 #define MAP_PRIVATE 0x02
139 #define MAP_ANONYMOUS 0x20
140 #define MAP_ANON MAP_ANONYMOUS
141 #define MAP_FAILED ((void *) -1)
143 #ifdef __USE_FILE_OFFSET64
144 # define DWORD_HI(x) (x >> 32)
145 # define DWORD_LO(x) ((x) & 0xffffffff)
147 # define DWORD_HI(x) (0)
148 # define DWORD_LO(x) (x)
151 static void *mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset)
153 uint32_t flProtect, dwDesiredAccess;
158 if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
161 if (!(flags & MAP_ANON) || offset)
163 } else if (flags & MAP_ANON)
166 if (prot & PROT_WRITE) {
167 if (prot & PROT_EXEC)
168 flProtect = PAGE_EXECUTE_READWRITE;
170 flProtect = PAGE_READWRITE;
171 } else if (prot & PROT_EXEC) {
172 if (prot & PROT_READ)
173 flProtect = PAGE_EXECUTE_READ;
174 else if (prot & PROT_EXEC)
175 flProtect = PAGE_EXECUTE;
177 flProtect = PAGE_READONLY;
179 end = length + offset;
182 mmap_fd = INVALID_HANDLE_VALUE;
184 mmap_fd = (HANDLE)_get_osfhandle(fd);
185 h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
189 if (prot & PROT_WRITE)
190 dwDesiredAccess = FILE_MAP_WRITE;
192 dwDesiredAccess = FILE_MAP_READ;
193 if (prot & PROT_EXEC)
194 dwDesiredAccess |= FILE_MAP_EXECUTE;
195 if (flags & MAP_PRIVATE)
196 dwDesiredAccess |= FILE_MAP_COPY;
197 ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
205 static void munmap(void *addr, size_t length)
207 UnmapViewOfFile(addr);
208 /* ruh-ro, we leaked handle from CreateFileMapping() ... */
210 #elif defined(NO_MMAP)
211 #define PROT_EXEC 0x04
215 #define MAP_PRIVATE 0
216 #define MAP_ANONYMOUS 0
218 void* mmap(void *desired_addr, size_t len, int mmap_prot, int mmap_flags, int fildes, size_t off)
223 void munmap(void *base_addr, size_t len)
228 int mprotect(void *addr, size_t len, int prot)
230 /* stub - not really needed at this point since this codepath has no dynarecs */
236 #ifndef MAP_ANONYMOUS
237 #define MAP_ANONYMOUS MAP_ANON
243 unsigned int requested_map;
247 pico_mmap_t pico_mmaps[] = {
253 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
257 if (ctr_svchack_successful)
259 pico_mmap_t* pico_mmap;
261 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
263 if ((pico_mmap->requested_map == addr))
265 unsigned int ptr_aligned, tmp;
266 unsigned int currentHandle;
267 unsigned int perm = 0b011;
272 size = (size + 0xFFF) & ~0xFFF;
273 pico_mmap->buffer = malloc(size + 0x1000);
274 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
276 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
278 if(svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, size, MEMOP_MAP, perm) < 0)
281 log_cb(RETRO_LOG_ERROR, "could not map memory @0x%08X\n", pico_mmap->requested_map);
285 svcCloseHandle(currentHandle);
286 return (void*)pico_mmap->requested_map;
294 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
296 if (ctr_svchack_successful)
298 pico_mmap_t* pico_mmap;
300 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
302 if ((pico_mmap->requested_map == (unsigned int)ptr))
304 unsigned int ptr_aligned;
305 unsigned int currentHandle;
308 oldsize = (oldsize + 0xFFF) & ~0xFFF;
309 newsize = (newsize + 0xFFF) & ~0xFFF;
310 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
312 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
314 svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, oldsize, MEMOP_UNMAP, 0b011);
316 tmp = realloc(pico_mmap->buffer, newsize + 0x1000);
320 pico_mmap->buffer = tmp;
321 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
323 svcControlProcessMemory(currentHandle, pico_mmap->requested_map, ptr_aligned, newsize, MEMOP_MAP, 0x3);
325 svcCloseHandle(currentHandle);
332 return realloc(ptr, newsize);
335 void plat_munmap(void *ptr, size_t size)
337 if (ctr_svchack_successful)
339 pico_mmap_t* pico_mmap;
341 for (pico_mmap = pico_mmaps; pico_mmap->requested_map; pico_mmap++)
343 if ((pico_mmap->requested_map == (unsigned int)ptr))
345 unsigned int ptr_aligned;
346 unsigned int currentHandle;
348 size = (size + 0xFFF) & ~0xFFF;
349 ptr_aligned = (((unsigned int)pico_mmap->buffer) + 0xFFF) & ~0xFFF;
351 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
353 svcControlProcessMemory(currentHandle, (void*)pico_mmap->requested_map, (void*)ptr_aligned, size, MEMOP_UNMAP, 0b011);
355 svcCloseHandle(currentHandle);
357 free(pico_mmap->buffer);
358 pico_mmap->buffer = NULL;
368 void *plat_mmap(unsigned long addr, size_t size, int need_exec, int is_fixed)
370 int flags = MAP_PRIVATE | MAP_ANONYMOUS;
374 ret = mmap(req, size, PROT_READ | PROT_WRITE, flags, -1, 0);
375 if (ret == MAP_FAILED) {
377 log_cb(RETRO_LOG_ERROR, "mmap(%08lx, %zd) failed: %d\n", addr, size, errno);
381 if (addr != 0 && ret != (void *)addr) {
383 log_cb(RETRO_LOG_WARN, "warning: wanted to map @%08lx, got %p\n",
395 void *plat_mremap(void *ptr, size_t oldsize, size_t newsize)
398 void *ret = mremap(ptr, oldsize, newsize, 0);
399 if (ret == MAP_FAILED)
405 size_t preserve_size;
407 preserve_size = oldsize;
408 if (preserve_size > newsize)
409 preserve_size = newsize;
410 tmp = malloc(preserve_size);
413 memcpy(tmp, ptr, preserve_size);
415 munmap(ptr, oldsize);
416 ret = mmap(ptr, newsize, PROT_READ | PROT_WRITE,
417 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
418 if (ret == MAP_FAILED) {
422 memcpy(ret, tmp, preserve_size);
428 void plat_munmap(void *ptr, size_t size)
435 int plat_mem_set_exec(void *ptr, size_t size)
438 int ret = VirtualProtect(ptr,size,PAGE_EXECUTE_READWRITE,0);
439 if (ret == 0 && log_cb)
440 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, 0);
443 if (ctr_svchack_successful)
445 unsigned int currentHandle;
446 svcDuplicateHandle(¤tHandle, 0xFFFF8001);
447 ret = svcControlProcessMemory(currentHandle, ptr, 0x0,
448 size, MEMOP_PROT, 0b111);
449 svcCloseHandle(currentHandle);
450 ctr_flush_invalidate_cache();
456 log_cb(RETRO_LOG_ERROR, "plat_mem_set_exec called with no svcControlProcessMemory access\n");
461 int ret = sceKernelOpenVMDomain();
463 int ret = mprotect(ptr, size, PROT_READ | PROT_WRITE | PROT_EXEC);
464 if (ret != 0 && log_cb)
465 log_cb(RETRO_LOG_ERROR, "mprotect(%p, %zd) failed: %d\n", ptr, size, errno);
470 void emu_video_mode_change(int start_line, int line_count, int is_32cols)
472 memset(vout_buf, 0, 320 * 240 * 2);
473 vout_width = is_32cols ? 256 : 320;
474 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
476 vout_height = line_count;
477 vout_offset = vout_width * start_line;
479 // Update the geometry
480 struct retro_system_av_info av_info;
481 retro_get_system_av_info(&av_info);
482 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
485 void emu_32x_startup(void)
489 void lprintf(const char *fmt, ...)
494 vsprintf(buffer, fmt, ap);
495 /* TODO - add 'level' param for warning/error messages? */
497 log_cb(RETRO_LOG_INFO, "%s", buffer);
502 void retro_set_environment(retro_environment_t cb)
504 static const struct retro_variable vars[] = {
505 { "picodrive_input1", "Input device 1; 3 button pad|6 button pad|None" },
506 { "picodrive_input2", "Input device 2; 3 button pad|6 button pad|None" },
507 { "picodrive_sprlim", "No sprite limit; disabled|enabled" },
508 { "picodrive_ramcart", "MegaCD RAM cart; disabled|enabled" },
509 { "picodrive_region", "Region; Auto|Japan NTSC|Japan PAL|US|Europe" },
510 { "picodrive_region_fps", "Region FPS; Auto|NTSC|PAL" },
511 { "picodrive_aspect", "Core-provided aspect ratio; PAR|4/3|CRT" },
513 { "picodrive_drc", "Dynamic recompilers; enabled|disabled" },
520 cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void *)vars);
523 void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
524 void retro_set_audio_sample(retro_audio_sample_t cb) { (void)cb; }
525 void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
526 void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
527 void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
529 unsigned retro_api_version(void)
531 return RETRO_API_VERSION;
534 void retro_set_controller_port_device(unsigned port, unsigned device)
538 void retro_get_system_info(struct retro_system_info *info)
540 memset(info, 0, sizeof(*info));
541 info->library_name = "PicoDrive";
543 #define GIT_VERSION ""
545 info->library_version = VERSION GIT_VERSION;
546 info->valid_extensions = "bin|gen|smd|md|32x|cue|iso|sms";
547 info->need_fullpath = true;
550 void retro_get_system_av_info(struct retro_system_av_info *info)
552 memset(info, 0, sizeof(*info));
553 info->timing.fps = Pico.m.pal ? 50 : 60;
554 info->timing.sample_rate = 44100;
555 info->geometry.base_width = vout_width;
556 info->geometry.base_height = vout_height;
557 info->geometry.max_width = vout_width;
558 info->geometry.max_height = vout_height;
560 float common_width = vout_width;
561 if (user_vout_width != 0)
562 common_width = user_vout_width;
564 info->geometry.aspect_ratio = common_width / vout_height;
568 struct savestate_state {
569 const char *load_buf;
575 size_t state_read(void *p, size_t size, size_t nmemb, void *file)
577 struct savestate_state *state = file;
578 size_t bsize = size * nmemb;
580 if (state->pos + bsize > state->size) {
582 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
583 state->pos + bsize, state->size);
584 bsize = state->size - state->pos;
589 memcpy(p, state->load_buf + state->pos, bsize);
594 size_t state_write(void *p, size_t size, size_t nmemb, void *file)
596 struct savestate_state *state = file;
597 size_t bsize = size * nmemb;
599 if (state->pos + bsize > state->size) {
601 log_cb(RETRO_LOG_ERROR, "savestate error: %u/%u\n",
602 state->pos + bsize, state->size);
603 bsize = state->size - state->pos;
608 memcpy(state->save_buf + state->pos, p, bsize);
613 size_t state_skip(void *p, size_t size, size_t nmemb, void *file)
615 struct savestate_state *state = file;
616 size_t bsize = size * nmemb;
622 size_t state_eof(void *file)
624 struct savestate_state *state = file;
626 return state->pos >= state->size;
629 int state_fseek(void *file, long offset, int whence)
631 struct savestate_state *state = file;
638 state->pos += offset;
641 state->pos = state->size + offset;
644 return (int)state->pos;
647 /* savestate sizes vary wildly depending if cd/32x or
648 * carthw is active, so run the whole thing to get size */
649 size_t retro_serialize_size(void)
651 struct savestate_state state = { 0, };
654 ret = PicoStateFP(&state, 1, NULL, state_skip, NULL, state_fseek);
661 bool retro_serialize(void *data, size_t size)
663 struct savestate_state state = { 0, };
666 state.save_buf = data;
670 ret = PicoStateFP(&state, 1, NULL, state_write,
675 bool retro_unserialize(const void *data, size_t size)
677 struct savestate_state state = { 0, };
680 state.load_buf = data;
684 ret = PicoStateFP(&state, 0, state_read, NULL,
685 state_eof, state_fseek);
690 void retro_cheat_reset(void)
694 void retro_cheat_set(unsigned index, bool enabled, const char *code)
698 /* multidisk support */
699 static bool disk_ejected;
700 static unsigned int disk_current_index;
701 static unsigned int disk_count;
702 static struct disks_state {
706 static bool disk_set_eject_state(bool ejected)
709 disk_ejected = ejected;
713 static bool disk_get_eject_state(void)
718 static unsigned int disk_get_image_index(void)
720 return disk_current_index;
723 static bool disk_set_image_index(unsigned int index)
725 enum cd_img_type cd_type;
728 if (index >= sizeof(disks) / sizeof(disks[0]))
731 if (disks[index].fname == NULL) {
733 log_cb(RETRO_LOG_ERROR, "missing disk #%u\n", index);
735 // RetroArch specifies "no disk" with index == count,
736 // so don't fail here..
737 disk_current_index = index;
742 log_cb(RETRO_LOG_INFO, "switching to disk %u: \"%s\"\n", index,
746 cd_type = PicoCdCheck(disks[index].fname, NULL);
747 if (cd_type != CIT_NOT_CD)
748 ret = cdd_load(disks[index].fname, cd_type);
751 log_cb(RETRO_LOG_ERROR, "Load failed, invalid CD image?\n");
755 disk_current_index = index;
759 static unsigned int disk_get_num_images(void)
764 static bool disk_replace_image_index(unsigned index,
765 const struct retro_game_info *info)
769 if (index >= sizeof(disks) / sizeof(disks[0]))
772 if (disks[index].fname != NULL)
773 free(disks[index].fname);
774 disks[index].fname = NULL;
777 disks[index].fname = strdup(info->path);
778 if (index == disk_current_index)
779 ret = disk_set_image_index(index);
785 static bool disk_add_image_index(void)
787 if (disk_count >= sizeof(disks) / sizeof(disks[0]))
794 static struct retro_disk_control_callback disk_control = {
795 disk_set_eject_state,
796 disk_get_eject_state,
797 disk_get_image_index,
798 disk_set_image_index,
800 disk_replace_image_index,
801 disk_add_image_index,
804 static void disk_tray_open(void)
807 log_cb(RETRO_LOG_INFO, "cd tray open\n");
811 static void disk_tray_close(void)
814 log_cb(RETRO_LOG_INFO, "cd tray close\n");
819 static const char * const biosfiles_us[] = {
820 "us_scd2_9306", "SegaCDBIOS9303", "us_scd1_9210", "bios_CD_U"
822 static const char * const biosfiles_eu[] = {
823 "eu_mcd2_9306", "eu_mcd2_9303", "eu_mcd1_9210", "bios_CD_E"
825 static const char * const biosfiles_jp[] = {
826 "jp_mcd2_921222", "jp_mcd1_9112", "jp_mcd1_9111", "bios_CD_J"
829 static void make_system_path(char *buf, size_t buf_size,
830 const char *name, const char *ext)
832 const char *dir = NULL;
834 if (environ_cb(RETRO_ENVIRONMENT_GET_SYSTEM_DIRECTORY, &dir) && dir) {
835 snprintf(buf, buf_size, "%s%c%s%s", dir, SLASH, name, ext);
838 snprintf(buf, buf_size, "%s%s", name, ext);
842 static const char *find_bios(int *region, const char *cd_fname)
844 const char * const *files;
845 static char path[256];
849 if (*region == 4) { // US
850 files = biosfiles_us;
851 count = sizeof(biosfiles_us) / sizeof(char *);
852 } else if (*region == 8) { // EU
853 files = biosfiles_eu;
854 count = sizeof(biosfiles_eu) / sizeof(char *);
855 } else if (*region == 1 || *region == 2) {
856 files = biosfiles_jp;
857 count = sizeof(biosfiles_jp) / sizeof(char *);
862 for (i = 0; i < count; i++)
864 make_system_path(path, sizeof(path), files[i], ".bin");
865 f = fopen(path, "rb");
869 make_system_path(path, sizeof(path), files[i], ".zip");
870 f = fopen(path, "rb");
877 log_cb(RETRO_LOG_INFO, "using bios: %s\n", path);
885 static void sram_reset()
892 SRam.changed = '\0' ;
893 SRam.eeprom_type = '\0';
895 SRam.eeprom_bit_cl = '\0';
896 SRam.eeprom_bit_in = '\0';
897 SRam.eeprom_bit_out = '\0';
901 bool retro_load_game(const struct retro_game_info *info)
903 enum media_type_e media_type;
904 static char carthw_path[256];
907 struct retro_input_descriptor desc[] = {
908 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
909 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
910 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
911 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
912 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
913 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
914 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
915 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
916 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
917 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
918 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
919 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
921 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
922 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
923 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
924 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
925 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
926 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "C" },
927 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "Y" },
928 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "A" },
929 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "X" },
930 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "Z" },
931 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT,"Mode" },
932 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
937 struct retro_input_descriptor desc_sms[] = {
938 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
939 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
940 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
941 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
942 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
943 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
944 { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
946 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "D-Pad Left" },
947 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "D-Pad Up" },
948 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "D-Pad Down" },
949 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "D-Pad Right" },
950 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "Button 1 Start" },
951 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "Button 2" },
952 { 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Button Pause" },
959 enum retro_pixel_format fmt = RETRO_PIXEL_FORMAT_RGB565;
960 if (!environ_cb(RETRO_ENVIRONMENT_SET_PIXEL_FORMAT, &fmt)) {
962 log_cb(RETRO_LOG_ERROR, "RGB565 support required, sorry\n");
966 if (info == NULL || info->path == NULL) {
968 log_cb(RETRO_LOG_ERROR, "info->path required\n");
972 for (i = 0; i < sizeof(disks) / sizeof(disks[0]); i++) {
973 if (disks[i].fname != NULL) {
974 free(disks[i].fname);
975 disks[i].fname = NULL;
979 disk_current_index = 0;
981 disks[0].fname = strdup(info->path);
983 make_system_path(carthw_path, sizeof(carthw_path), "carthw", ".cfg");
985 media_type = PicoLoadMedia(info->path, carthw_path,
988 switch (media_type) {
991 log_cb(RETRO_LOG_ERROR, "Failed to detect ROM/CD image type.\n");
995 log_cb(RETRO_LOG_ERROR, "Invalid CD image\n");
997 case PM_BAD_CD_NO_BIOS:
999 log_cb(RETRO_LOG_ERROR, "Missing BIOS\n");
1003 log_cb(RETRO_LOG_ERROR, "Load error\n");
1009 if (media_type == PM_MARK3)
1010 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc_sms);
1012 environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, desc);
1016 PicoWriteSound = snd_write;
1017 memset(sndBuffer, 0, sizeof(sndBuffer));
1018 PsndOut = sndBuffer;
1024 bool retro_load_game_special(unsigned game_type, const struct retro_game_info *info, size_t num_info)
1029 void retro_unload_game(void)
1033 unsigned retro_get_region(void)
1035 return Pico.m.pal ? RETRO_REGION_PAL : RETRO_REGION_NTSC;
1038 void *retro_get_memory_data(unsigned type)
1044 case RETRO_MEMORY_SAVE_RAM:
1045 if (PicoAHW & PAHW_MCD)
1046 data = Pico_mcd->bram;
1050 case RETRO_MEMORY_SYSTEM_RAM:
1051 if (PicoAHW & PAHW_SMS)
1064 size_t retro_get_memory_size(unsigned type)
1071 case RETRO_MEMORY_SAVE_RAM:
1072 if (PicoAHW & PAHW_MCD)
1076 if (Pico.m.frame_count == 0)
1079 // if game doesn't write to sram, don't report it to
1080 // libretro so that RA doesn't write out zeroed .srm
1081 for (i = 0, sum = 0; i < SRam.size; i++)
1082 sum |= SRam.data[i];
1084 return (sum != 0) ? SRam.size : 0;
1086 case RETRO_MEMORY_SYSTEM_RAM:
1087 if (PicoAHW & PAHW_SMS)
1088 return sizeof(Pico.vramb);
1090 return sizeof(Pico.ram);
1098 void retro_reset(void)
1103 static const unsigned short retro_pico_map[] = {
1117 #define RETRO_PICO_MAP_LEN (sizeof(retro_pico_map) / sizeof(retro_pico_map[0]))
1119 static void snd_write(int len)
1121 audio_batch_cb(PsndOut, len / 4);
1124 static enum input_device input_name_to_val(const char *name)
1126 if (strcmp(name, "3 button pad") == 0)
1127 return PICO_INPUT_PAD_3BTN;
1128 if (strcmp(name, "6 button pad") == 0)
1129 return PICO_INPUT_PAD_6BTN;
1130 if (strcmp(name, "None") == 0)
1131 return PICO_INPUT_NOTHING;
1134 log_cb(RETRO_LOG_WARN, "invalid picodrive_input: '%s'\n", name);
1135 return PICO_INPUT_PAD_3BTN;
1138 static void update_variables(void)
1140 struct retro_variable var;
1143 var.key = "picodrive_input1";
1144 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1145 PicoSetInputDevice(0, input_name_to_val(var.value));
1148 var.key = "picodrive_input2";
1149 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
1150 PicoSetInputDevice(1, input_name_to_val(var.value));
1153 var.key = "picodrive_sprlim";
1154 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1155 if (strcmp(var.value, "enabled") == 0)
1156 PicoOpt |= POPT_DIS_SPRITE_LIM;
1158 PicoOpt &= ~POPT_DIS_SPRITE_LIM;
1162 var.key = "picodrive_ramcart";
1163 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1164 if (strcmp(var.value, "enabled") == 0)
1165 PicoOpt |= POPT_EN_MCD_RAMCART;
1167 PicoOpt &= ~POPT_EN_MCD_RAMCART;
1170 int OldPicoRegionOverride = PicoRegionOverride;
1172 var.key = "picodrive_region";
1173 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1174 if (strcmp(var.value, "Auto") == 0)
1175 PicoRegionOverride = 0;
1176 else if (strcmp(var.value, "Japan NTSC") == 0)
1177 PicoRegionOverride = 1;
1178 else if (strcmp(var.value, "Japan PAL") == 0)
1179 PicoRegionOverride = 2;
1180 else if (strcmp(var.value, "US") == 0)
1181 PicoRegionOverride = 4;
1182 else if (strcmp(var.value, "Europe") == 0)
1183 PicoRegionOverride = 8;
1186 int OldPicoRegionFPSOverride = PicoRegionFPSOverride;
1188 var.key = "picodrive_region_fps";
1189 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1190 if (strcmp(var.value, "Auto") == 0)
1191 PicoRegionFPSOverride = 0;
1192 else if (strcmp(var.value, "NTSC") == 0)
1193 PicoRegionFPSOverride = 1;
1194 else if (strcmp(var.value, "PAL") == 0)
1195 PicoRegionFPSOverride = 2;
1198 // Update region, fps and sound flags if needed
1199 if (PicoRegionOverride != OldPicoRegionOverride ||
1200 PicoRegionFPSOverride != OldPicoRegionFPSOverride)
1207 float old_user_vout_width = user_vout_width;
1209 var.key = "picodrive_aspect";
1210 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1211 if (strcmp(var.value, "4/3") == 0)
1212 user_vout_width = VOUT_4_3;
1213 else if (strcmp(var.value, "CRT") == 0)
1214 user_vout_width = VOUT_CRT;
1216 user_vout_width = VOUT_PAR;
1219 if (user_vout_width != old_user_vout_width)
1221 // Update the geometry
1222 struct retro_system_av_info av_info;
1223 retro_get_system_av_info(&av_info);
1224 environ_cb(RETRO_ENVIRONMENT_SET_GEOMETRY, &av_info);
1229 var.key = "picodrive_drc";
1230 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
1231 if (strcmp(var.value, "enabled") == 0)
1232 PicoOpt |= POPT_EN_DRC;
1234 PicoOpt &= ~POPT_EN_DRC;
1238 if(!ctr_svchack_successful)
1239 PicoOpt &= ~POPT_EN_DRC;
1243 void retro_run(void)
1245 bool updated = false;
1248 if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE_UPDATE, &updated) && updated)
1253 PicoPad[0] = PicoPad[1] = 0;
1254 for (pad = 0; pad < 2; pad++)
1255 for (i = 0; i < RETRO_PICO_MAP_LEN; i++)
1256 if (input_state_cb(pad, RETRO_DEVICE_JOYPAD, 0, i))
1257 PicoPad[pad] |= retro_pico_map[i];
1261 video_cb((short *)vout_buf + vout_offset,
1262 vout_width, vout_height, vout_width * 2);
1265 static void check_system_specs(void)
1267 /* TODO - set different performance level for 32X - 6 for ARM dynarec, higher for interpreter core */
1269 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1272 void retro_init(void)
1274 struct retro_log_callback log;
1278 environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
1280 if (environ_cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &log))
1285 environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &disk_control);
1288 ctr_svchack_successful = ctr_svchack_init();
1290 sceBlock = getVMBlock();
1293 PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80
1294 | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_MCD_GFX
1295 | POPT_EN_32X|POPT_EN_PWM
1296 | POPT_ACC_SPRITES|POPT_DIS_32C_BORDER;
1299 if (ctr_svchack_successful)
1301 PicoOpt |= POPT_EN_DRC;
1304 PicoAutoRgnOrder = 0x184; // US, EU, JP
1309 vout_buf = linearMemAlign(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2, 0x80);
1311 vout_buf = malloc(VOUT_MAX_WIDTH * VOUT_MAX_HEIGHT * 2);
1315 PicoDrawSetOutFormat(PDF_RGB555, 0);
1316 PicoDrawSetOutBuf(vout_buf, vout_width * 2);
1318 //PicoMessage = plat_status_msg_busy_next;
1319 PicoMCDopenTray = disk_tray_open;
1320 PicoMCDcloseTray = disk_tray_close;
1325 void retro_deinit(void)
1328 linearFree(vout_buf);