X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=common%2Femu.c;h=7d680b8b97fe09f254dd06240ff2ec841110a4f4;hb=ca69c3e5a0ecf407c02dc85c6f3282ebb1efc5a2;hp=8548bdcf268bc2a50397dfad0a06c136f03b4e05;hpb=9ecdd73ae7f2666068d5bd8d6c2abde3040aa998;p=libpicofe.git

diff --git a/common/emu.c b/common/emu.c
index 8548bdc..7d680b8 100644
--- a/common/emu.c
+++ b/common/emu.c
@@ -1,10 +1,11 @@
-// (c) Copyright 2006-2007 notaz, All rights reserved.
+// (c) Copyright 2006-2009 notaz, All rights reserved.
 // Free for non-commercial use.
 
 // For commercial use, separate licencing terms must be obtained.
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #ifndef NO_SYNC
 #include <unistd.h>
 #endif
@@ -21,9 +22,10 @@
 #include <pico/pico_int.h>
 #include <pico/patch.h>
 #include <pico/cd/cue.h>
-#include <zlib/zlib.h>
 
 
+#define STATUS_MSG_TIMEOUT 2000
+
 void *g_screen_ptr;
 
 #if !SCREEN_SIZE_FIXED
@@ -39,11 +41,15 @@ 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 */
+static char noticeMsg[40];
 
 unsigned char *movie_data = NULL;
 static int movie_size = 0;
@@ -75,9 +81,9 @@ static int try_rfn_cut(char *fname)
 	return 0;
 }
 
-static void get_ext(char *file, char *ext)
+static void get_ext(const char *file, char *ext)
 {
-	char *p;
+	const char *p;
 
 	p = file + strlen(file) - 4;
 	if (p < file) p = file;
@@ -86,15 +92,61 @@ static void get_ext(char *file, char *ext)
 	strlwr_(ext);
 }
 
-static const char *biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303" };
-static const char *biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303"   };
-static const char *biosfiles_jp[] = { "jp_mcd1_9112", "jp_mcd1_9111" };
+static void fname_ext(char *dst, int dstlen, const char *prefix, const char *ext, const char *fname)
+{
+	int prefix_len = 0;
+	const char *p;
+
+	*dst = 0;
+	if (prefix) {
+		int len = plat_get_root_dir(dst, dstlen);
+		strcpy(dst + len, prefix);
+		prefix_len = len + strlen(prefix);
+	}
+
+	p = fname + strlen(fname) - 1;
+	for (; p >= fname && *p != PATH_SEP_C; p--)
+		;
+	p++;
+	strncpy(dst + prefix_len, p, dstlen - prefix_len - 1);
+
+	dst[dstlen - 8] = 0;
+	if (dst[strlen(dst) - 4] == '.')
+		dst[strlen(dst) - 4] = 0;
+	if (ext)
+		strcat(dst, ext);
+}
+
+static void romfname_ext(char *dst, int dstlen, const char *prefix, const char *ext)
+{
+	fname_ext(dst, dstlen, prefix, ext, rom_fname_loaded);
+}
+
+void emu_status_msg(const char *format, ...)
+{
+	va_list vl;
+	int ret;
+
+	va_start(vl, format);
+	ret = vsnprintf(noticeMsg, sizeof(noticeMsg), format, vl);
+	va_end(vl);
+
+	/* be sure old text gets overwritten */
+	for (; ret < 28; ret++)
+		noticeMsg[ret] = ' ';
+	noticeMsg[ret] = 0;
+
+	notice_msg_time = plat_get_ticks_ms();
+}
+
+static const char * const biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "SegaCDBIOS9303" };
+static const char * const biosfiles_eu[] = { "eu_mcd1_9210", "eu_mcd2_9306", "eu_mcd2_9303"   };
+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 **files;
+	const char * const *files;
 	FILE *f = NULL;
 
 	if (region == 4) { // US
@@ -112,26 +164,27 @@ 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;
 	}
 }
@@ -153,14 +206,14 @@ static int emu_isBios(const char *name)
 
 static unsigned char id_header[0x100];
 
-/* checks if fname points to valid MegaCD image
- * if so, checks for suitable BIOS */
-int emu_cd_check(int *pregion, char *fname_in)
+/* checks if fname points to valid MegaCD image */
+static int emu_cd_check(int *pregion, const char *fname_in)
 {
+	const char *fname = fname_in;
 	unsigned char buf[32];
 	pm_file *cd_f;
 	int region = 4; // 1: Japan, 4: US, 8: Europe
-	char ext[5], *fname = fname_in;
+	char ext[5];
 	cue_track_type type = CT_UNKNOWN;
 	cue_data_t *cue_data = NULL;
 
@@ -221,6 +274,96 @@ int emu_cd_check(int *pregion, char *fname_in)
 	return type;
 }
 
+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 ext[5];
+	int i;
+
+	get_ext(fname, ext);
+
+	// detect wrong extensions
+	if (!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) // s.gz ~ .mds.gz
+		return PM_BAD;
+
+	/* don't believe in extensions, except .cue */
+	if (strcasecmp(ext, ".cue") == 0)
+		return PM_CD;
+
+	pmf = pm_open(fname);
+	if (pmf == NULL)
+		return PM_BAD;
+
+	if (pm_read(buff0, 32, pmf) != 32) {
+		pm_close(pmf);
+		return PM_BAD;
+	}
+
+	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])
+			continue;
+
+		if (pm_read(buff, 16, pmf) != 16)
+			continue;
+
+		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;
+	}
+
+looks_like_md:
+	pm_close(pmf);
+	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)
 {
 	char *p = dest;
@@ -252,7 +395,7 @@ static int extract_text(char *dest, const unsigned char *src, int len, int swab)
 	return p - dest;
 }
 
-static char *emu_make_rom_id(void)
+static char *emu_make_rom_id(const char *fname)
 {
 	static char id_string[3+0xe*3+0x3*3+0x30*3+3];
 	int pos, swab = 1;
@@ -261,15 +404,25 @@ static char *emu_make_rom_id(void)
 		strcpy(id_string, "CD|");
 		swab = 0;
 	}
-	else strcpy(id_string, "MD|");
+	else if (PicoAHW & PAHW_SMS)
+		strcpy(id_string, "MS|");
+	else	strcpy(id_string, "MD|");
 	pos = 3;
 
-	pos += extract_text(id_string + pos, id_header + 0x80, 0x0e, swab); // serial
-	id_string[pos] = '|'; pos++;
-	pos += extract_text(id_string + pos, id_header + 0xf0, 0x03, swab); // region
-	id_string[pos] = '|'; pos++;
-	pos += extract_text(id_string + pos, id_header + 0x50, 0x30, swab); // overseas name
-	id_string[pos] = 0;
+	if (!(PicoAHW & PAHW_SMS)) {
+		pos += extract_text(id_string + pos, id_header + 0x80, 0x0e, swab); // serial
+		id_string[pos] = '|'; pos++;
+		pos += extract_text(id_string + pos, id_header + 0xf0, 0x03, swab); // region
+		id_string[pos] = '|'; pos++;
+		pos += extract_text(id_string + pos, id_header + 0x50, 0x30, swab); // overseas name
+		id_string[pos] = 0;
+		if (pos > 5)
+			return id_string;
+		pos = 3;
+	}
+
+	// can't find name in ROM, use filename
+	fname_ext(id_string + 3, sizeof(id_string) - 3, NULL, NULL, fname);
 
 	return id_string;
 }
@@ -298,7 +451,37 @@ static void shutdown_MCD(void)
 	PicoAHW &= ~PAHW_MCD;
 }
 
+static void system_announce(void)
+{
+	const char *sys_name, *tv_standard, *extra = "";
+	int fps;
+
+	if (PicoAHW & PAHW_SMS) {
+		sys_name = "Master System";
+#ifdef NO_SMS
+		extra = " [no support]";
+#endif
+	} 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%s", tv_standard, sys_name, fps, extra);
+}
+
 // note: this function might mangle rom_fname
+// XXX: portions of this code should move to pico/
 int emu_reload_rom(char *rom_fname)
 {
 	unsigned int rom_size = 0;
@@ -306,49 +489,45 @@ int emu_reload_rom(char *rom_fname)
 	unsigned char *rom_data = NULL;
 	char ext[5];
 	pm_file *rom = NULL;
-	int ret, cd_state, cd_region, cfg_loaded = 0;
+	int cd_state = CIT_NOT_CD;
+	int ret, media_type, cd_region;
+	int cfg_loaded = 0, bad_rom = 0;
 
 	lprintf("emu_ReloadRom(%s)\n", rom_fname);
 
 	get_ext(rom_fname, ext);
 
-	// detect wrong extensions
-	if (!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz
-		me_update_msg("Not a ROM/CD selected.");
-		return 0;
-	}
-
+	// early cleanup
 	PicoPatchUnload();
-
-	// check for movie file
 	if (movie_data) {
 		free(movie_data);
 		movie_data = 0;
 	}
+
 	if (!strcmp(ext, ".gmv"))
 	{
 		// 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.");
@@ -374,90 +553,108 @@ int emu_reload_rom(char *rom_fname)
 		get_ext(rom_fname, ext);
 	}
 
+	media_type = detect_media(rom_fname);
+	if (media_type == PM_BAD) {
+		me_update_msg("Not a ROM/CD img selected.");
+		return 0;
+	}
+
 	shutdown_MCD();
+	PicoCartUnload();
+	rom_loaded = 0;
 
-	// check for MegaCD image
-	cd_state = emu_cd_check(&cd_region, rom_fname);
-	if (cd_state >= 0 && cd_state != CIT_NOT_CD)
+	PicoAHW = 0;
+
+	if (media_type == PM_CD)
 	{
-		PicoAHW |= PAHW_MCD;
-		// valid CD image, check for BIOS..
+		// check for MegaCD image
+		cd_state = emu_cd_check(&cd_region, rom_fname);
+		if (cd_state >= 0 && cd_state != CIT_NOT_CD)
+		{
+			// valid CD image, check for BIOS..
 
-		// we need to have config loaded at this point
-		ret = emu_read_config(1, 1);
-		if (!ret) emu_read_config(0, 1);
-		cfg_loaded = 1;
+			// we need to have config loaded at this point
+			ret = emu_read_config(rom_fname, 0);
+			if (!ret) emu_read_config(NULL, 0);
+			cfg_loaded = 1;
+
+			if (PicoRegionOverride) {
+				cd_region = PicoRegionOverride;
+				lprintf("override region to %s\n", cd_region != 4 ?
+					(cd_region == 8 ? "EU" : "JAP") : "USA");
+			}
+			if (!find_bios(cd_region, &used_rom_name))
+				return 0;
 
-		if (PicoRegionOverride) {
-			cd_region = PicoRegionOverride;
-			lprintf("overrided region to %s\n", cd_region != 4 ? (cd_region == 8 ? "EU" : "JAP") : "USA");
+			get_ext(used_rom_name, ext);
+			PicoAHW |= PAHW_MCD;
 		}
-		if (!find_bios(cd_region, &used_rom_name)) {
-			PicoAHW &= ~PAHW_MCD;
+		else {
+			me_update_msg("Invalid CD image");
 			return 0;
 		}
-
-		get_ext(used_rom_name, ext);
 	}
-	else
-	{
-		if (PicoAHW & PAHW_MCD) Stop_CD();
-		PicoAHW &= ~PAHW_MCD;
+	else if (media_type == PM_MARK3) {
+		lprintf("detected SMS ROM\n");
+		PicoAHW = PAHW_SMS;
 	}
 
 	rom = pm_open(used_rom_name);
-	if (!rom) {
-		me_update_msg("Failed to open ROM/CD image");
-		goto fail;
-	}
-
-	if (cd_state < 0) {
-		me_update_msg("Invalid CD image");
-		goto fail;
+	if (rom == NULL) {
+		me_update_msg("Failed to open ROM");
+		return 0;
 	}
 
 	menu_romload_prepare(used_rom_name); // also CD load
+	used_rom_name = NULL; // uses static_buff
 
-	PicoCartUnload();
-	rom_loaded = 0;
-
-	if ( (ret = PicoCartLoad(rom, &rom_data, &rom_size)) ) {
+	ret = PicoCartLoad(rom, &rom_data, &rom_size, (PicoAHW & PAHW_SMS) ? 1 : 0);
+	pm_close(rom);
+	if (ret != 0) {
 		if      (ret == 2) me_update_msg("Out of memory");
 		else if (ret == 3) me_update_msg("Read failed");
 		else               me_update_msg("PicoCartLoad() failed.");
-		goto fail2;
+		goto fail;
 	}
-	pm_close(rom);
-	rom = NULL;
 
-	// detect wrong files (Pico crashes on very small files), also see if ROM EP is good
-	if (rom_size <= 0x200 || strncmp((char *)rom_data, "Pico", 4) == 0 ||
-	  ((*(unsigned char *)(rom_data+4)<<16)|(*(unsigned short *)(rom_data+6))) >= (int)rom_size) {
-		if (rom_data) free(rom_data);
-		me_update_msg("Not a ROM selected.");
-		goto fail2;
+	// detect wrong files
+	if (strncmp((char *)rom_data, "Pico", 4) == 0)
+		bad_rom = 1;
+	else if (!(PicoAHW & PAHW_SMS)) {
+		unsigned short *d = (unsigned short *)(rom_data + 4);
+		if ((((d[0] << 16) | d[1]) & 0xffffff) >= (int)rom_size) {
+			lprintf("bad reset vector\n");
+			bad_rom = 1;
+		}
+	}
+
+	if (bad_rom) {
+		me_update_msg("Bad ROM detected.");
+		goto fail;
 	}
 
 	// load config for this ROM (do this before insert to get correct region)
 	if (!(PicoAHW & PAHW_MCD))
 		memcpy(id_header, rom_data + 0x100, sizeof(id_header));
 	if (!cfg_loaded) {
-		ret = emu_read_config(1, 1);
-		if (!ret) emu_read_config(0, 1);
+		ret = emu_read_config(rom_fname, 0);
+		if (!ret) emu_read_config(NULL, 0);
 	}
 
-	lprintf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);
-	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 fail2;
+		goto fail;
 	}
 
 	// insert CD if it was detected
 	if (cd_state != CIT_NOT_CD) {
 		ret = Insert_CD(rom_fname, cd_state);
 		if (ret != 0) {
+			PicoCartUnload();
+			rom_data = NULL; // freed by unload
 			me_update_msg("Insert_CD() failed, invalid CD image?");
-			goto fail2;
+			goto fail;
 		}
 	}
 
@@ -485,53 +682,50 @@ int emu_reload_rom(char *rom_fname)
 			// TODO: bits 6 & 5
 		}
 		movie_data[0x18+30] = 0;
-		plat_status_msg("MOVIE: %s", (char *) &movie_data[0x18]);
+		emu_status_msg("MOVIE: %s", (char *) &movie_data[0x18]);
 	}
 	else
 	{
+		system_announce();
 		PicoOpt &= ~POPT_DIS_VDP_FIFO;
-		plat_status_msg(Pico.m.pal ? "PAL SYSTEM / 50 FPS" : "NTSC SYSTEM / 60 FPS");
 	}
 
+	strncpy(rom_fname_loaded, rom_fname, sizeof(rom_fname_loaded)-1);
+	rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;
+	rom_loaded = 1;
+
 	// load SRAM for this ROM
 	if (currentConfig.EmuOpt & EOPT_EN_SRAM)
 		emu_save_load_game(1, 1);
 
-	strncpy(rom_fname_loaded, rom_fname, sizeof(rom_fname_loaded)-1);
-	rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;
-	rom_loaded = 1;
 	return 1;
 
-fail2:
-	menu_romload_end();
 fail:
-	if (rom != NULL) pm_close(rom);
+	if (rom_data)
+		free(rom_data);
+	menu_romload_end();
 	return 0;
 }
 
-static void romfname_ext(char *dst, const char *prefix, const char *ext)
+int emu_swap_cd(const char *fname)
 {
-	char *p;
-	int prefix_len = 0;
-
-	// make save filename
-	p = rom_fname_loaded + strlen(rom_fname_loaded) - 1;
-	for (; p >= rom_fname_loaded && *p != PATH_SEP_C; p--); p++;
-	*dst = 0;
-	if (prefix) {
-		int len = plat_get_root_dir(dst, 512);
-		strcpy(dst + len, prefix);
-		prefix_len = len + strlen(prefix);
+	cd_img_type cd_type;
+	int ret = -1;
+
+	cd_type = emu_cd_check(NULL, fname);
+	if (cd_type != CIT_NOT_CD)
+		ret = Insert_CD(fname, cd_type);
+	if (ret != 0) {
+		me_update_msg("Load failed, invalid CD image?");
+		return 0;
 	}
-#ifdef UIQ3
-	else p = rom_fname_loaded; // backward compatibility
-#endif
-	strncpy(dst + prefix_len, p, 511-prefix_len);
-	dst[511-8] = 0;
-	if (dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;
-	if (ext) strcat(dst, ext);
+
+	strncpy(rom_fname_loaded, fname, sizeof(rom_fname_loaded)-1);
+	rom_fname_loaded[sizeof(rom_fname_loaded)-1] = 0;
+	return 1;
 }
 
+// <base dir><end>
 void emu_make_path(char *buff, const char *end, int size)
 {
 	int pos, end_len;
@@ -557,6 +751,28 @@ static void make_config_cfg(char *cfg_buff_512)
 	cfg_buff_512[511] = 0;
 }
 
+void emu_prep_defconfig(void)
+{
+	memset(&defaultConfig, 0, sizeof(defaultConfig));
+	defaultConfig.EmuOpt    = 0x9d | EOPT_RAM_TIMINGS|EOPT_EN_CD_LEDS;
+	defaultConfig.s_PicoOpt = POPT_EN_STEREO|POPT_EN_FM|POPT_EN_PSG|POPT_EN_Z80 |
+				  POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES |
+				  POPT_EN_32X|POPT_EN_PWM;
+	defaultConfig.s_PsndRate = 44100;
+	defaultConfig.s_PicoRegion = 0; // auto
+	defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
+	defaultConfig.s_PicoCDBuffers = 0;
+	defaultConfig.confirm_save = EOPT_CONFIRM_SAVE;
+	defaultConfig.Frameskip = -1; // auto
+	defaultConfig.volume = 50;
+	defaultConfig.gamma = 100;
+	defaultConfig.scaling = 0;
+	defaultConfig.turbo_rate = 15;
+
+	// platform specific overrides
+	pemu_prep_defconfig();
+}
+
 void emu_set_defconfig(void)
 {
 	memcpy(&currentConfig, &defaultConfig, sizeof(currentConfig));
@@ -565,25 +781,28 @@ void emu_set_defconfig(void)
 	PicoRegionOverride = currentConfig.s_PicoRegion;
 	PicoAutoRgnOrder = currentConfig.s_PicoAutoRgnOrder;
 	PicoCDBuffers = currentConfig.s_PicoCDBuffers;
+	p32x_msh2_multiplier = MSH2_MULTI_DEFAULT;
+	p32x_ssh2_multiplier = SSH2_MULTI_DEFAULT;
 }
 
-int emu_read_config(int game, int no_defaults)
+int emu_read_config(const char *rom_fname, int no_defaults)
 {
 	char cfg[512];
 	int ret;
 
-	if (!game)
+	if (!no_defaults)
+		emu_set_defconfig();
+
+	if (rom_fname == NULL)
 	{
-		if (!no_defaults)
-			emu_set_defconfig();
+		// global config
 		make_config_cfg(cfg);
 		ret = config_readsect(cfg, NULL);
 	}
 	else
 	{
-		char *sect = emu_make_rom_id();
+		char *sect = emu_make_rom_id(rom_fname);
 
-		// try new .cfg way
 		if (config_slot != 0)
 		     sprintf(cfg, "game.%i.cfg", config_slot);
 		else strcpy(cfg,  "game.cfg");
@@ -602,7 +821,8 @@ int emu_read_config(int game, int no_defaults)
 			// read global config, and apply game_def.cfg on top
 			make_config_cfg(cfg);
 			config_readsect(cfg, NULL);
-			ret = config_readsect("game_def.cfg", sect);
+			emu_make_path(cfg, "game_def.cfg", sizeof(cfg));
+			ret = config_readsect(cfg, sect);
 		}
 
 		if (ret == 0)
@@ -611,7 +831,7 @@ int emu_read_config(int game, int no_defaults)
 		}
 	}
 
-	plat_validate_config();
+	pemu_validate_config();
 
 	// some sanity checks
 #ifdef PSP
@@ -643,7 +863,7 @@ int emu_write_config(int is_game)
 		if (config_slot != 0)
 		     sprintf(cfg, "game.%i.cfg", config_slot);
 		else strcpy(cfg,  "game.cfg");
-		game_sect = emu_make_rom_id();
+		game_sect = emu_make_rom_id(rom_fname_loaded);
 		lprintf("emu_write_config: sect \"%s\"\n", game_sect);
 	}
 
@@ -662,32 +882,36 @@ int emu_write_config(int is_game)
 
 /* always using built-in font */
 
-#define mk_text_out(name, type, val) \
+#define mk_text_out(name, type, val, topleft, step_x, step_y) \
 void name(int x, int y, const char *text)				\
 {									\
 	int i, l, len = strlen(text);					\
-	type *screen = (type *)g_screen_ptr + x + y * g_screen_width;	\
+	type *screen = (type *)(topleft) + x * step_x + y * step_y;	\
 									\
-	for (i = 0; i < len; i++, screen += 8)				\
+	for (i = 0; i < len; i++, screen += 8 * step_x)			\
 	{								\
 		for (l = 0; l < 8; l++)					\
 		{							\
 			unsigned char fd = fontdata8x8[text[i] * 8 + l];\
-			type *s = screen + l * g_screen_width;		\
-			if (fd&0x80) s[0] = val;			\
-			if (fd&0x40) s[1] = val;			\
-			if (fd&0x20) s[2] = val;			\
-			if (fd&0x10) s[3] = val;			\
-			if (fd&0x08) s[4] = val;			\
-			if (fd&0x04) s[5] = val;			\
-			if (fd&0x02) s[6] = val;			\
-			if (fd&0x01) s[7] = val;			\
+			type *s = screen + l * step_y;			\
+			if (fd&0x80) s[step_x * 0] = val;		\
+			if (fd&0x40) s[step_x * 1] = val;		\
+			if (fd&0x20) s[step_x * 2] = val;		\
+			if (fd&0x10) s[step_x * 3] = val;		\
+			if (fd&0x08) s[step_x * 4] = val;		\
+			if (fd&0x04) s[step_x * 5] = val;		\
+			if (fd&0x02) s[step_x * 6] = val;		\
+			if (fd&0x01) s[step_x * 7] = val;		\
 		}							\
 	}								\
 }
 
-mk_text_out(emu_textOut8, unsigned char, 0xf0)
-mk_text_out(emu_textOut16, unsigned short, 0xffff)
+mk_text_out(emu_text_out8,      unsigned char,    0xf0, g_screen_ptr, 1, g_screen_width)
+mk_text_out(emu_text_out16,     unsigned short, 0xffff, g_screen_ptr, 1, g_screen_width)
+mk_text_out(emu_text_out8_rot,  unsigned char,    0xf0,
+	(char *)g_screen_ptr  + (g_screen_width - 1) * g_screen_height, -g_screen_height, 1)
+mk_text_out(emu_text_out16_rot, unsigned short, 0xffff,
+	(short *)g_screen_ptr + (g_screen_width - 1) * g_screen_height, -g_screen_height, 1)
 
 #undef mk_text_out
 
@@ -698,7 +922,7 @@ void update_movie(void)
 	if (offs+3 > movie_size) {
 		free(movie_data);
 		movie_data = 0;
-		plat_status_msg("END OF MOVIE.");
+		emu_status_msg("END OF MOVIE.");
 		lprintf("END OF MOVIE.\n");
 	} else {
 		// MXYZ SACB RLDU
@@ -719,18 +943,6 @@ void update_movie(void)
 	}
 }
 
-
-static size_t gzRead2(void *p, size_t _size, size_t _n, void *file)
-{
-	return gzread(file, p, _n);
-}
-
-
-static size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)
-{
-	return gzwrite(file, p, _n);
-}
-
 static int try_ropen_file(const char *fname)
 {
 	FILE *f;
@@ -745,72 +957,66 @@ 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)
 	{
-		romfname_ext(saveFname, (PicoAHW&1) ? "brm"PATH_SEP : "srm"PATH_SEP, (PicoAHW&1) ? ".brm" : ".srm");
-		if (load) {
-			if (try_ropen_file(saveFname)) return saveFname;
-			// try in current dir..
-			romfname_ext(saveFname, NULL, (PicoAHW & PAHW_MCD) ? ".brm" : ".srm");
-			if (try_ropen_file(saveFname)) return saveFname;
-			return NULL; // give up
-		}
+		strcpy(ext, (PicoAHW & PAHW_MCD) ? ".brm" : ".srm");
+		romfname_ext(saveFname, sizeof(static_buff),
+			(PicoAHW & PAHW_MCD) ? "brm"PATH_SEP : "srm"PATH_SEP, ext);
+		if (!load)
+			return saveFname;
+
+		if (try_ropen_file(saveFname))
+			return saveFname;
+
+		romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
+		if (try_ropen_file(saveFname))
+			return saveFname;
 	}
 	else
 	{
+		const char *ext_main = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds.gz" : ".mds";
+		const char *ext_othr = (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds" : ".mds.gz";
 		ext[0] = 0;
-		if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);
-		strcat(ext, (currentConfig.EmuOpt & EOPT_GZIP_SAVES) ? ".mds.gz" : ".mds");
-
-		romfname_ext(saveFname, "mds" PATH_SEP, ext);
-		if (load) {
-			if (try_ropen_file(saveFname)) return saveFname;
-			romfname_ext(saveFname, NULL, ext);
-			if (try_ropen_file(saveFname)) return saveFname;
-			// no gzipped states, search for non-gzipped
-			if (currentConfig.EmuOpt & EOPT_GZIP_SAVES)
-			{
-				ext[0] = 0;
-				if(slot > 0 && slot < 10) sprintf(ext, ".%i", slot);
-				strcat(ext, ".mds");
-
-				romfname_ext(saveFname, "mds"PATH_SEP, ext);
-				if (try_ropen_file(saveFname)) return saveFname;
-				romfname_ext(saveFname, NULL, ext);
-				if (try_ropen_file(saveFname)) return saveFname;
-			}
-			return NULL;
+		if (slot > 0 && slot < 10)
+			sprintf(ext, ".%i", slot);
+		strcat(ext, ext_main);
+
+		if (!load) {
+			romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
+			return saveFname;
+		}
+		else {
+			romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
+			if (try_ropen_file(saveFname))
+				return saveFname;
+
+			romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
+			if (try_ropen_file(saveFname))
+				return saveFname;
+
+			// try the other ext
+			ext[0] = 0;
+			if (slot > 0 && slot < 10)
+				sprintf(ext, ".%i", slot);
+			strcat(ext, ext_othr);
+
+			romfname_ext(saveFname, sizeof(static_buff), "mds"PATH_SEP, ext);
+			if (try_ropen_file(saveFname))
+				return saveFname;
 		}
 	}
 
-	return saveFname;
+	return NULL;
 }
 
-int emu_check_save_file(int slot)
+int emu_check_save_file(int slot, int *time)
 {
 	return emu_get_save_fname(1, 0, slot) ? 1 : 0;
 }
 
-void emu_setSaveStateCbs(int gz)
-{
-	if (gz) {
-		areaRead  = gzRead2;
-		areaWrite = gzWrite2;
-		areaEof   = (areaeof *) gzeof;
-		areaSeek  = (areaseek *) gzseek;
-		areaClose = (areaclose *) gzclose;
-	} else {
-		areaRead  = (arearw *) fread;
-		areaWrite = (arearw *) fwrite;
-		areaEof   = (areaeof *) feof;
-		areaSeek  = (areaseek *) fseek;
-		areaClose = (areaclose *) fclose;
-	}
-}
-
 int emu_save_load_game(int load, int sram)
 {
 	int ret = 0;
@@ -820,7 +1026,7 @@ int emu_save_load_game(int load, int sram)
 	saveFname = emu_get_save_fname(load, sram, state_slot);
 	if (saveFname == NULL) {
 		if (!sram)
-			plat_status_msg(load ? "LOAD FAILED (missing file)" : "SAVE FAILED");
+			emu_status_msg(load ? "LOAD FAILED (missing file)" : "SAVE FAILED");
 		return -1;
 	}
 
@@ -834,7 +1040,7 @@ 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)
@@ -845,17 +1051,19 @@ 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);
@@ -881,35 +1089,14 @@ int emu_save_load_game(int load, int sram)
 	}
 	else
 	{
-		void *PmovFile = NULL;
-		if (strcmp(saveFname + strlen(saveFname) - 3, ".gz") == 0)
-		{
-			if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {
-				emu_setSaveStateCbs(1);
-				if (!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);
-			}
-		}
-		else
-		{
-			if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {
-				emu_setSaveStateCbs(0);
-			}
-		}
-		if(PmovFile) {
-			ret = PmovState(load ? 6 : 5, PmovFile);
-			areaClose(PmovFile);
-			PmovFile = 0;
-			if (load) Pico.m.dirtyPal=1;
+		ret = PicoState(saveFname, !load);
+		if (!ret) {
 #ifndef NO_SYNC
-			else sync();
+			if (!load) sync();
 #endif
-		}
-		else	ret = -1;
-		if (!ret)
-			plat_status_msg(load ? "GAME LOADED" : "GAME SAVED");
-		else
-		{
-			plat_status_msg(load ? "LOAD FAILED" : "SAVE FAILED");
+			emu_status_msg(load ? "STATE LOADED" : "STATE SAVED");
+		} else {
+			emu_status_msg(load ? "LOAD FAILED" : "SAVE FAILED");
 			ret = -1;
 		}
 
@@ -931,7 +1118,7 @@ void emu_set_fastforward(int set_on)
 		currentConfig.EmuOpt &= ~4;
 		currentConfig.EmuOpt |= 0x40000;
 		is_on = 1;
-		plat_status_msg("FAST FORWARD");
+		emu_status_msg("FAST FORWARD");
 	}
 	else if (!set_on && is_on) {
 		PsndOut = set_PsndOut;
@@ -942,9 +1129,23 @@ void emu_set_fastforward(int set_on)
 	}
 }
 
-static void emu_msg_tray_open(void)
+static void emu_tray_open(void)
 {
-	plat_status_msg("CD tray opened");
+	engineState = PGS_TrayMenu;
+}
+
+static void emu_tray_close(void)
+{
+	emu_status_msg("CD tray closed.");
+}
+
+void emu_32x_startup(void)
+{
+	plat_video_toggle_renderer(0, 0); // HACK
+	system_announce();
+
+	// force mode change event
+	rendstatus_old = -1;
 }
 
 void emu_reset_game(void)
@@ -962,9 +1163,9 @@ void run_events_pico(unsigned int events)
 		if (pico_inp_mode > 2)
 			pico_inp_mode = 0;
 		switch (pico_inp_mode) {
-			case 2: plat_status_msg("Input: Pen on Pad"); break;
-			case 1: plat_status_msg("Input: Pen on Storyware"); break;
-			case 0: plat_status_msg("Input: Joystick");
+			case 2: emu_status_msg("Input: Pen on Pad"); break;
+			case 1: emu_status_msg("Input: Pen on Storyware"); break;
+			case 0: emu_status_msg("Input: Joystick");
 				PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
 				break;
 		}
@@ -973,13 +1174,13 @@ void run_events_pico(unsigned int events)
 		PicoPicohw.page--;
 		if (PicoPicohw.page < 0)
 			PicoPicohw.page = 0;
-		plat_status_msg("Page %i", PicoPicohw.page);
+		emu_status_msg("Page %i", PicoPicohw.page);
 	}
 	if (events & PEV_PICO_PNEXT) {
 		PicoPicohw.page++;
 		if (PicoPicohw.page > 6)
 			PicoPicohw.page = 6;
-		plat_status_msg("Page %i", PicoPicohw.page);
+		emu_status_msg("Page %i", PicoPicohw.page);
 	}
 
 	if (pico_inp_mode == 0)
@@ -1038,9 +1239,9 @@ static void run_events_ui(unsigned int which)
 	if (which & (PEV_STATE_LOAD|PEV_STATE_SAVE))
 	{
 		int do_it = 1;
-		if ( emu_check_save_file(state_slot) &&
-				(((which & PEV_STATE_LOAD) && (currentConfig.EmuOpt & EOPT_CONFIRM_LOAD)) ||
-				 ((which & PEV_STATE_SAVE) && (currentConfig.EmuOpt & EOPT_CONFIRM_SAVE))) )
+		if ( emu_check_save_file(state_slot, NULL) &&
+			(((which & PEV_STATE_LOAD) && (currentConfig.confirm_save & EOPT_CONFIRM_LOAD)) ||
+			 ((which & PEV_STATE_SAVE) && (currentConfig.confirm_save & EOPT_CONFIRM_SAVE))) )
 		{
 			const char *nm;
 			char tmp[64];
@@ -1056,19 +1257,19 @@ static void run_events_ui(unsigned int which)
 
 			plat_status_msg_busy_first(tmp);
 
-			in_set_blocking(1);
-			while (in_menu_wait_any(50) & (PBTN_MA3|PBTN_MBACK))
+			in_set_config_int(0, IN_CFG_BLOCKING, 1);
+			while (in_menu_wait_any(NULL, 50) & (PBTN_MA3|PBTN_MBACK))
 				;
-			while ( !((keys = in_menu_wait_any(50)) & (PBTN_MA3|PBTN_MBACK)) )
+			while ( !((keys = in_menu_wait_any(NULL, 50)) & (PBTN_MA3|PBTN_MBACK)) )
 				;
 			if (keys & PBTN_MBACK)
 				do_it = 0;
-			while (in_menu_wait_any(50) & (PBTN_MA3|PBTN_MBACK))
+			while (in_menu_wait_any(NULL, 50) & (PBTN_MA3|PBTN_MBACK))
 				;
-			in_set_blocking(0);
+			in_set_config_int(0, IN_CFG_BLOCKING, 0);
 		}
 		if (do_it) {
-			plat_status_msg_busy_first((which & PEV_STATE_LOAD) ? "LOADING GAME" : "SAVING GAME");
+			plat_status_msg_busy_first((which & PEV_STATE_LOAD) ? "LOADING STATE" : "SAVING STATE");
 			PicoStateProgressCB = plat_status_msg_busy_next;
 			emu_save_load_game((which & PEV_STATE_LOAD) ? 1 : 0, 0);
 			PicoStateProgressCB = NULL;
@@ -1090,8 +1291,8 @@ static void run_events_ui(unsigned int which)
 				state_slot = 0;
 		}
 
-		plat_status_msg("SAVE SLOT %i [%s]", state_slot,
-			emu_check_save_file(state_slot) ? "USED" : "FREE");
+		emu_status_msg("SAVE SLOT %i [%s]", state_slot,
+			emu_check_save_file(state_slot, NULL) ? "USED" : "FREE");
 	}
 	if (which & PEV_MENU)
 		engineState = PGS_Menu;
@@ -1150,24 +1351,60 @@ static void mkdir_path(char *path_with_reserve, int pos, const char *name)
 		lprintf("failed to create: %s\n", path_with_reserve);
 }
 
+void emu_cmn_forced_frame(int no_scale, int do_emu)
+{
+	int po_old = PicoOpt;
+
+	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);
+
+	PicoOpt &= ~POPT_ALT_RENDERER;
+	PicoOpt |= POPT_ACC_SPRITES;
+	if (!no_scale)
+		PicoOpt |= POPT_EN_SOFTSCALE;
+
+	PicoDrawSetOutFormat(PDF_RGB555, 1);
+	Pico.m.dirtyPal = 1;
+	if (do_emu)
+		PicoFrame();
+	else
+		PicoFrameDrawOnly();
+
+	PicoOpt = po_old;
+}
+
 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");
 	mkdir_path(path, pos, "srm");
 	mkdir_path(path, pos, "brm");
 
+	pprof_init();
+
 	make_config_cfg(path);
 	config_readlrom(path);
 
 	PicoInit();
 	PicoMessage = plat_status_msg_busy_next;
-	PicoMCDopenTray = emu_msg_tray_open;
-	PicoMCDcloseTray = menu_loop_tray;
+	PicoMCDopenTray = emu_tray_open;
+	PicoMCDcloseTray = emu_tray_close;
 }
 
 void emu_finish(void)
@@ -1187,6 +1424,213 @@ void emu_finish(void)
 #endif
 	}
 
+	pprof_finish();
+
 	PicoExit();
 }
 
+static void skip_frame(int do_audio)
+{
+	PicoSkipFrame = do_audio ? 1 : 2;
+	PicoFrame();
+	PicoSkipFrame = 0;
+}
+
+/* our tick here is 1 us right now */
+#define ms_to_ticks(x) (unsigned int)(x * 1000)
+#define get_ticks() plat_get_ticks_us()
+
+void emu_loop(void)
+{
+	int pframes_done;		/* "period" frames, used for sync */
+	int frames_done, frames_shown;	/* actual frames for fps counter */
+	int target_fps, target_frametime;
+	unsigned int timestamp_base = 0, timestamp_fps;
+	char *notice_msg = NULL;
+	char fpsbuff[24];
+	int i;
+
+	fpsbuff[0] = 0;
+
+	/* make sure we are in correct mode */
+	Pico.m.dirtyPal = 1;
+	rendstatus_old = -1;
+
+	PicoLoopPrepare();
+
+	// prepare CD buffer
+	if (PicoAHW & PAHW_MCD)
+		PicoCDBufferInit();
+
+	pemu_loop_prep();
+
+	/* number of ticks per frame */
+	if (Pico.m.pal) {
+		target_fps = 50;
+		target_frametime = ms_to_ticks(1000) / 50;
+	} else {
+		target_fps = 60;
+		target_frametime = ms_to_ticks(1000) / 60 + 1;
+	}
+
+	timestamp_fps = get_ticks();
+	reset_timing = 1;
+
+	frames_done = frames_shown = pframes_done = 0;
+
+	plat_video_wait_vsync();
+
+	/* loop with resync every 1 sec. */
+	while (engineState == PGS_Running)
+	{
+		unsigned int timestamp;
+		int diff, diff_lim;
+
+		pprof_start(main);
+
+		timestamp = get_ticks();
+		if (reset_timing) {
+			reset_timing = 0;
+			timestamp_base = timestamp;
+			pframes_done = 0;
+		}
+
+		// show notice_msg message?
+		if (notice_msg_time != 0)
+		{
+			static int noticeMsgSum;
+			if (timestamp - ms_to_ticks(notice_msg_time) > ms_to_ticks(STATUS_MSG_TIMEOUT)) {
+				notice_msg_time = 0;
+				plat_status_msg_clear();
+				notice_msg = NULL;
+			} else {
+				int sum = noticeMsg[0] + noticeMsg[1] + noticeMsg[2];
+				if (sum != noticeMsgSum) {
+					plat_status_msg_clear();
+					noticeMsgSum = sum;
+				}
+				notice_msg = noticeMsg;
+			}
+		}
+
+		// second changed?
+		if (timestamp - timestamp_fps >= ms_to_ticks(1000))
+		{
+#ifdef BENCHMARK
+			static int bench = 0, bench_fps = 0, bench_fps_s = 0, bfp = 0, bf[4];
+			if (++bench == 10) {
+				bench = 0;
+				bench_fps_s = bench_fps;
+				bf[bfp++ & 3] = bench_fps;
+				bench_fps = 0;
+			}
+			bench_fps += frames_shown;
+			sprintf(fpsbuff, "%02i/%02i/%02i", frames_shown, bench_fps_s, (bf[0]+bf[1]+bf[2]+bf[3])>>2);
+			printf("%s\n", fpsbuff);
+#else
+			if (currentConfig.EmuOpt & EOPT_SHOW_FPS) {
+				sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
+				if (fpsbuff[5] == 0) { fpsbuff[5] = fpsbuff[6] = ' '; fpsbuff[7] = 0; }
+			}
+#endif
+			frames_shown = frames_done = 0;
+			timestamp_fps += ms_to_ticks(1000);
+		}
+#ifdef PFRAMES
+		sprintf(fpsbuff, "%i", Pico.m.frame_count);
+#endif
+
+		if (timestamp - timestamp_base >= ms_to_ticks(1000))
+		{
+			if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && currentConfig.Frameskip >= 0)
+				pframes_done = 0;
+			else
+				pframes_done -= target_fps;
+			if (pframes_done < -2) {
+				/* don't drag more than 2 frames behind */
+				pframes_done = -2;
+				timestamp_base = timestamp - 2 * target_frametime;
+			}
+			else
+				timestamp_base += ms_to_ticks(1000);
+		}
+
+		diff = timestamp - timestamp_base;
+		diff_lim = (pframes_done + 1) * target_frametime;
+
+		if (currentConfig.Frameskip >= 0) // frameskip enabled
+		{
+			for (i = 0; i < currentConfig.Frameskip; i++) {
+				emu_update_input();
+				skip_frame(1);
+				pframes_done++; frames_done++;
+				diff_lim += target_frametime;
+
+				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
+						plat_wait_till_us(timestamp_base + diff_lim);
+				}
+			}
+		}
+		else if (diff > diff_lim)
+		{
+			/* no time left for this frame - skip */
+			/* limit auto frameskip to 8 */
+			if (frames_done / 8 <= frames_shown) {
+				emu_update_input();
+				skip_frame(diff < diff_lim + target_frametime * 16);
+				pframes_done++; frames_done++;
+				continue;
+			}
+		}
+
+		emu_update_input();
+		PicoFrame();
+		pemu_finalize_frame(fpsbuff, notice_msg);
+
+		// plat_video_flip();
+
+		/* frame limiter */
+		if (!reset_timing && !(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT)))
+		{
+			timestamp = get_ticks();
+			diff = timestamp - timestamp_base;
+
+			// sleep or vsync if we are still too fast
+			if (diff < diff_lim)
+			{
+				// we are too fast
+				plat_wait_till_us(timestamp_base + diff_lim - target_frametime / 4);
+				if (currentConfig.EmuOpt & EOPT_VSYNC)
+					plat_video_wait_vsync();
+			}
+		}
+
+		// XXX: for some plats it might be better to flip before vsync
+		// (due to shadow registers in display hw)
+		plat_video_flip();
+
+		pframes_done++; frames_done++; frames_shown++;
+
+		pprof_end(main);
+	}
+
+	emu_set_fastforward(0);
+
+	// save SRAM
+	if ((currentConfig.EmuOpt & EOPT_EN_SRAM) && SRam.changed) {
+		plat_status_msg_busy_first("Writing SRAM/BRAM...");
+		emu_save_load_game(0, 1);
+		SRam.changed = 0;
+	}
+
+	pemu_loop_end();
+
+	// pemu_loop_end() might want to do 1 frame for bg image,
+	// so free CD buffer here
+	if (PicoAHW & PAHW_MCD)
+		PicoCDBufferFree();
+}
+