X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Fcommon%2Femu.c;h=e916b3f27a9bd0e95033c7ebb2b3bd0bc90c7cc3;hb=18b9412743dafb4de7a889b4fba7e34f8a1e8b70;hp=1cecc39f6476f1ee7f7d757a1a23b34cd75cc681;hpb=3e49ffd0bf13f3a889cfb5196c2a61962dff6d0b;p=picodrive.git
diff --git a/platform/common/emu.c b/platform/common/emu.c
index 1cecc39..e916b3f 100644
--- a/platform/common/emu.c
+++ b/platform/common/emu.c
@@ -41,9 +41,11 @@ int pico_pen_x = 320/2, pico_pen_y = 240/2;
int pico_inp_mode = 0;
int engineState = PGS_Menu;
+/* tmp buff to reduce stack usage for plats with small stack */
+static char static_buff[512];
/* TODO: len checking */
-char rom_fname_reload[512] = { 0, };
-char rom_fname_loaded[512] = { 0, };
+char rom_fname_reload[512];
+char rom_fname_loaded[512];
int rom_loaded = 0;
int reset_timing = 0;
static unsigned int notice_msg_time; /* when started showing */
@@ -113,7 +115,6 @@ static const char * const biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };
static int find_bios(int region, char **bios_file)
{
- static char bios_path[1024];
int i, count;
const char * const *files;
FILE *f = NULL;
@@ -133,26 +134,27 @@ static int find_bios(int region, char **bios_file)
for (i = 0; i < count; i++)
{
- emu_make_path(bios_path, files[i], sizeof(bios_path) - 4);
- strcat(bios_path, ".bin");
- f = fopen(bios_path, "rb");
+ emu_make_path(static_buff, files[i], sizeof(static_buff) - 4);
+ strcat(static_buff, ".bin");
+ f = fopen(static_buff, "rb");
if (f) break;
- bios_path[strlen(bios_path) - 4] = 0;
- strcat(bios_path, ".zip");
- f = fopen(bios_path, "rb");
+ static_buff[strlen(static_buff) - 4] = 0;
+ strcat(static_buff, ".zip");
+ f = fopen(static_buff, "rb");
if (f) break;
}
if (f) {
- lprintf("using bios: %s\n", bios_path);
+ lprintf("using bios: %s\n", static_buff);
fclose(f);
- if (bios_file) *bios_file = bios_path;
+ if (bios_file)
+ *bios_file = static_buff;
return 1;
} else {
- sprintf(bios_path, "no %s BIOS files found, read docs",
+ sprintf(static_buff, "no %s BIOS files found, read docs",
region != 4 ? (region == 8 ? "EU" : "JAP") : "USA");
- me_update_msg(bios_path);
+ me_update_msg(static_buff);
return 0;
}
}
@@ -245,8 +247,11 @@ static int emu_cd_check(int *pregion, const char *fname_in)
static int detect_media(const char *fname)
{
static const short sms_offsets[] = { 0x7ff0, 0x3ff0, 0x1ff0 };
+ static const char *sms_exts[] = { "sms", "gg", "sg" };
+ static const char *md_exts[] = { "gen", "bin", "smd" };
+ char buff0[32], buff[32];
+ unsigned short *d16;
pm_file *pmf;
- char buff[32];
char ext[5];
int i;
@@ -264,34 +269,69 @@ static int detect_media(const char *fname)
if (pmf == NULL)
return PM_BAD;
- if (pm_read(buff, 32, pmf) != 32) {
+ if (pm_read(buff0, 32, pmf) != 32) {
pm_close(pmf);
return PM_BAD;
}
- if (strncasecmp("SEGADISCSYSTEM", buff + 0x00, 14) == 0 ||
- strncasecmp("SEGADISCSYSTEM", buff + 0x10, 14) == 0) {
+ if (strncasecmp("SEGADISCSYSTEM", buff0 + 0x00, 14) == 0 ||
+ strncasecmp("SEGADISCSYSTEM", buff0 + 0x10, 14) == 0) {
pm_close(pmf);
return PM_CD;
}
+ /* check for SMD evil */
+ if (pmf->size >= 0x4200 && (pmf->size & 0x3fff) == 0x200) {
+ if (pm_seek(pmf, sms_offsets[0] + 0x200, SEEK_SET) == sms_offsets[0] + 0x200 &&
+ pm_read(buff, 16, pmf) == 16 &&
+ strncmp("TMR SEGA", buff, 8) == 0)
+ goto looks_like_sms;
+
+ /* could parse further but don't bother */
+ goto extension_check;
+ }
+
+ /* MD header? Act as TMSS BIOS here */
+ if (pm_seek(pmf, 0x100, SEEK_SET) == 0x100 && pm_read(buff, 16, pmf) == 16) {
+ if (strncmp(buff, "SEGA", 4) == 0 || strncmp(buff, " SEG", 4) == 0)
+ goto looks_like_md;
+ }
+
for (i = 0; i < array_size(sms_offsets); i++) {
if (pm_seek(pmf, sms_offsets[i], SEEK_SET) != sms_offsets[i])
- goto not_mark3; /* actually it could be but can't be detected */
+ continue;
if (pm_read(buff, 16, pmf) != 16)
- goto not_mark3;
+ continue;
- if (strncasecmp("TMR SEGA", buff, 8) == 0) {
- pm_close(pmf);
- return PM_MARK3;
- }
+ if (strncmp("TMR SEGA", buff, 8) == 0)
+ goto looks_like_sms;
+ }
+
+extension_check:
+ /* probably some headerless thing. Maybe check the extension after all. */
+ for (i = 0; i < array_size(md_exts); i++)
+ if (strcasecmp(pmf->ext, md_exts[i]) == 0)
+ goto looks_like_md;
+
+ for (i = 0; i < array_size(sms_exts); i++)
+ if (strcasecmp(pmf->ext, sms_exts[i]) == 0)
+ goto looks_like_sms;
+
+ /* If everything else fails, make a guess on the reset vector */
+ d16 = (unsigned short *)(buff0 + 4);
+ if ((((d16[0] << 16) | d16[1]) & 0xffffff) >= pmf->size) {
+ lprintf("bad MD reset vector, assuming SMS\n");
+ goto looks_like_sms;
}
-not_mark3:
+looks_like_md:
pm_close(pmf);
- /* the main emu function is to emulate MD, so assume MD */
return PM_MD_CART;
+
+looks_like_sms:
+ pm_close(pmf);
+ return PM_MARK3;
}
static int extract_text(char *dest, const unsigned char *src, int len, int swab)
@@ -371,6 +411,32 @@ static void shutdown_MCD(void)
PicoAHW &= ~PAHW_MCD;
}
+static void system_announce(void)
+{
+ const char *sys_name, *tv_standard;
+ int fps;
+
+ if (PicoAHW & PAHW_SMS) {
+ sys_name = "Master System";
+ } else if (PicoAHW & PAHW_PICO) {
+ sys_name = "Pico";
+ } else if (PicoAHW & PAHW_MCD) {
+ sys_name = "Mega CD";
+ if ((Pico.m.hardware & 0xc0) == 0x80)
+ sys_name = "Sega CD";
+ } else if (PicoAHW & PAHW_32X) {
+ sys_name = "32X";
+ } else {
+ sys_name = "MegaDrive";
+ if ((Pico.m.hardware & 0xc0) == 0x80)
+ sys_name = "Genesis";
+ }
+ tv_standard = Pico.m.pal ? "PAL" : "NTSC";
+ fps = Pico.m.pal ? 50 : 60;
+
+ emu_status_msg("%s %s / %dFPS", tv_standard, sys_name, fps);
+}
+
// note: this function might mangle rom_fname
// XXX: portions of this code should move to pico/
int emu_reload_rom(char *rom_fname)
@@ -398,25 +464,25 @@ int emu_reload_rom(char *rom_fname)
// check for both gmv and rom
int dummy;
FILE *movie_file = fopen(rom_fname, "rb");
- if(!movie_file) {
+ if (!movie_file) {
me_update_msg("Failed to open movie.");
return 0;
}
fseek(movie_file, 0, SEEK_END);
movie_size = ftell(movie_file);
fseek(movie_file, 0, SEEK_SET);
- if(movie_size < 64+3) {
+ if (movie_size < 64+3) {
me_update_msg("Invalid GMV file.");
fclose(movie_file);
return 0;
}
movie_data = malloc(movie_size);
- if(movie_data == NULL) {
+ if (movie_data == NULL) {
me_update_msg("low memory.");
fclose(movie_file);
return 0;
}
- fread(movie_data, 1, movie_size, movie_file);
+ dummy = fread(movie_data, 1, movie_size, movie_file);
fclose(movie_file);
if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {
me_update_msg("Invalid GMV file.");
@@ -450,6 +516,10 @@ int emu_reload_rom(char *rom_fname)
shutdown_MCD();
PicoPatchUnload();
+ PicoCartUnload();
+ rom_loaded = 0;
+
+ PicoAHW = 0;
if (media_type == PM_CD)
{
@@ -492,9 +562,7 @@ int emu_reload_rom(char *rom_fname)
}
menu_romload_prepare(used_rom_name); // also CD load
-
- PicoCartUnload();
- rom_loaded = 0;
+ used_rom_name = NULL; // uses static_buff
ret = PicoCartLoad(rom, &rom_data, &rom_size, (PicoAHW & PAHW_SMS) ? 1 : 0);
pm_close(rom);
@@ -529,7 +597,8 @@ int emu_reload_rom(char *rom_fname)
if (!ret) emu_read_config(0, 0);
}
- if (PicoCartInsert(rom_data, rom_size)) {
+ emu_make_path(static_buff, "carthw.cfg", sizeof(static_buff));
+ if (PicoCartInsert(rom_data, rom_size, static_buff)) {
me_update_msg("Failed to load ROM.");
goto fail;
}
@@ -573,21 +642,7 @@ int emu_reload_rom(char *rom_fname)
}
else
{
- const char *sys_name, *tv_standard;
- int fps;
-
- if (PicoAHW & PAHW_SMS) {
- sys_name = "Master System";
- } else {
- sys_name = "MegaDrive";
- if ((Pico.m.hardware&0xc0) == 0x80)
- sys_name = "Genesis";
- }
- tv_standard = Pico.m.pal ? "PAL" : "NTSC";
- fps = Pico.m.pal ? 50 : 60;
-
- emu_status_msg("%s %s / %dFPS", tv_standard, sys_name, fps);
-
+ system_announce();
PicoOpt &= ~POPT_DIS_VDP_FIFO;
}
@@ -649,6 +704,7 @@ static void romfname_ext(char *dst, const char *prefix, const char *ext)
if (ext) strcat(dst, ext);
}
+//
void emu_make_path(char *buff, const char *end, int size)
{
int pos, end_len;
@@ -856,7 +912,7 @@ static int try_ropen_file(const char *fname)
char *emu_get_save_fname(int load, int is_sram, int slot)
{
- static char saveFname[512];
+ char *saveFname = static_buff;
char ext[16];
if (is_sram)
@@ -938,7 +994,7 @@ int emu_save_load_game(int load, int sram)
int truncate = 1;
if (PicoAHW & PAHW_MCD)
{
- if (PicoOpt&POPT_EN_MCD_RAMCART) {
+ if (PicoOpt & POPT_EN_MCD_RAMCART) {
sram_size = 0x12000;
sram_data = SRam.data;
if (sram_data)
@@ -949,17 +1005,19 @@ int emu_save_load_game(int load, int sram)
truncate = 0; // the .brm may contain RAM cart data after normal brm
}
} else {
- sram_size = SRam.end-SRam.start+1;
- if(Pico.m.sram_reg & 4) sram_size=0x2000;
+ sram_size = SRam.size;
sram_data = SRam.data;
}
- if (!sram_data) return 0; // SRam forcefully disabled for this game
+ if (sram_data == NULL)
+ return 0; // SRam forcefully disabled for this game
if (load)
{
sramFile = fopen(saveFname, "rb");
- if(!sramFile) return -1;
- fread(sram_data, 1, sram_size, sramFile);
+ if (!sramFile)
+ return -1;
+ ret = fread(sram_data, 1, sram_size, sramFile);
+ ret = ret > 0 ? 0 : -1;
fclose(sramFile);
if ((PicoAHW & PAHW_MCD) && (PicoOpt&POPT_EN_MCD_RAMCART))
memcpy32((int *)Pico_mcd->bram, (int *)sram_data, 0x2000/4);
@@ -1035,6 +1093,12 @@ static void emu_tray_close(void)
emu_status_msg("CD tray closed.");
}
+void emu_32x_startup(void)
+{
+ plat_video_toggle_renderer(0, 1, 0);
+ system_announce();
+}
+
void emu_reset_game(void)
{
PicoReset();
@@ -1162,9 +1226,9 @@ static void run_events_ui(unsigned int which)
PicoStateProgressCB = NULL;
}
}
- if (which & PEV_SWITCH_RND)
+ if ((which & PEV_SWITCH_RND) && !(PicoAHW & PAHW_32X))
{
- plat_video_toggle_renderer(1, 0);
+ plat_video_toggle_renderer(1, 0, 0);
}
if (which & (PEV_SSLOT_PREV|PEV_SSLOT_NEXT))
{
@@ -1243,6 +1307,19 @@ void emu_init(void)
char path[512];
int pos;
+#if 0
+ // FIXME: handle through menu, etc
+ FILE *f;
+ f = fopen("32X_M_BIOS.BIN", "rb");
+ p32x_bios_m = malloc(2048);
+ fread(p32x_bios_m, 1, 2048, f);
+ fclose(f);
+ f = fopen("32X_S_BIOS.BIN", "rb");
+ p32x_bios_s = malloc(1024);
+ fread(p32x_bios_s, 1, 1024, f);
+ fclose(f);
+#endif
+
/* make dirs for saves */
pos = plat_get_root_dir(path, sizeof(path) - 4);
mkdir_path(path, pos, "mds");
@@ -1293,7 +1370,7 @@ void emu_loop(void)
{
int pframes_done; /* "period" frames, used for sync */
int frames_done, frames_shown; /* actual frames for fps counter */
- int oldmodes, target_fps, target_frametime;
+ int target_fps, target_frametime;
unsigned int timestamp_base = 0, timestamp_fps;
char *notice_msg = NULL;
char fpsbuff[24];
@@ -1302,8 +1379,8 @@ void emu_loop(void)
fpsbuff[0] = 0;
/* make sure we are in correct mode */
- oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
Pico.m.dirtyPal = 1;
+ rendstatus_old = -1;
/* number of ticks per frame */
if (Pico.m.pal) {
@@ -1317,6 +1394,7 @@ void emu_loop(void)
// prepare CD buffer
if (PicoAHW & PAHW_MCD)
PicoCDBufferInit();
+ PicoLoopPrepare();
pemu_loop_prep();
@@ -1332,7 +1410,6 @@ void emu_loop(void)
{
unsigned int timestamp;
int diff, diff_lim;
- int modes;
timestamp = get_ticks();
if (reset_timing) {
@@ -1359,13 +1436,6 @@ void emu_loop(void)
}
}
- // check for mode changes
- modes = ((Pico.video.reg[12]&1)<<2) | (Pico.video.reg[1]&8);
- if (modes != oldmodes) {
- oldmodes = modes;
- pemu_video_mode_change(!(modes & 4), (modes & 8));
- }
-
// second changed?
if (timestamp - timestamp_fps >= ms_to_ticks(1000))
{
@@ -1420,7 +1490,7 @@ void emu_loop(void)
pframes_done++; frames_done++;
diff_lim += target_frametime;
- if (!(currentConfig.EmuOpt & EOPT_NO_FRMLIMIT)) {
+ if (!(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT))) {
timestamp = get_ticks();
diff = timestamp - timestamp_base;
if (!reset_timing && diff < diff_lim) // we are too fast
@@ -1446,7 +1516,7 @@ void emu_loop(void)
PicoFrame();
/* frame limiter */
- if (!reset_timing && !(currentConfig.EmuOpt & EOPT_NO_FRMLIMIT))
+ if (!reset_timing && !(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT)))
{
timestamp = get_ticks();
diff = timestamp - timestamp_base;