X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Fcommon%2Femu.c;h=8eda13a8b8dd67fb54c0329049c2f5fb98cbc467;hb=d4d626658a7a999f48009f408b4a22d280ab80ea;hp=1cecc39f6476f1ee7f7d757a1a23b34cd75cc681;hpb=3e49ffd0bf13f3a889cfb5196c2a61962dff6d0b;p=picodrive.git

diff --git a/platform/common/emu.c b/platform/common/emu.c
index 1cecc39..8eda13a 100644
--- a/platform/common/emu.c
+++ b/platform/common/emu.c
@@ -1,7 +1,10 @@
-// (c) Copyright 2006-2009 notaz, All rights reserved.
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
+/*
+ * PicoDrive
+ * (C) notaz, 2007-2010
+ *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
+ */
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -10,14 +13,16 @@
 #include <unistd.h>
 #endif
 
+#include "../libpicofe/posix.h"
+#include "../libpicofe/input.h"
+#include "../libpicofe/fonts.h"
+#include "../libpicofe/sndout.h"
+#include "../libpicofe/lprintf.h"
+#include "../libpicofe/plat.h"
 #include "emu.h"
-#include "menu.h"
-#include "fonts.h"
-#include "lprintf.h"
-#include "config.h"
-#include "plat.h"
-#include "input.h"
-#include "posix.h"
+#include "input_pico.h"
+#include "menu_pico.h"
+#include "config_file.h"
 
 #include <pico/pico_int.h>
 #include <pico/patch.h>
@@ -41,9 +46,12 @@ int pico_pen_x = 320/2, pico_pen_y = 240/2;
 int pico_inp_mode = 0;
 int engineState = PGS_Menu;
 
-/* TODO: len checking */
-char rom_fname_reload[512] = { 0, };
-char rom_fname_loaded[512] = { 0, };
+static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
+
+/* tmp buff to reduce stack usage for plats with small stack */
+static char static_buff[512];
+const char *rom_fname_reload;
+char rom_fname_loaded[512];
 int rom_loaded = 0;
 int reset_timing = 0;
 static unsigned int notice_msg_time;	/* when started showing */
@@ -90,6 +98,36 @@ static void get_ext(const char *file, char *ext)
 	strlwr_(ext);
 }
 
+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;
@@ -111,9 +149,8 @@ static const char * const biosfiles_us[] = { "us_scd1_9210", "us_scd2_9306", "Se
 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 int find_bios(int region, const char **bios_file)
 {
-	static char bios_path[1024];
 	int i, count;
 	const char * const *files;
 	FILE *f = NULL;
@@ -133,26 +170,27 @@ 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);
+		menu_update_msg(static_buff);
 		return 0;
 	}
 }
@@ -245,8 +283,11 @@ 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 +305,69 @@ 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)
@@ -325,7 +401,7 @@ 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;
@@ -334,15 +410,25 @@ 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;
 }
@@ -371,61 +457,99 @@ static void shutdown_MCD(void)
 	PicoAHW &= ~PAHW_MCD;
 }
 
-// note: this function might mangle rom_fname
+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);
+}
+
 // XXX: portions of this code should move to pico/
-int emu_reload_rom(char *rom_fname)
+int emu_reload_rom(const char *rom_fname_in)
 {
 	unsigned int rom_size = 0;
-	char *used_rom_name = rom_fname;
+	const char *used_rom_name = NULL;
+	char *rom_fname = NULL;
 	unsigned char *rom_data = NULL;
 	char ext[5];
 	pm_file *rom = NULL;
 	int cd_state = CIT_NOT_CD;
 	int ret, media_type, cd_region;
 	int cfg_loaded = 0, bad_rom = 0;
+	int menu_romload_started = 0;
+	int retval = 0;
 
-	lprintf("emu_ReloadRom(%s)\n", rom_fname);
+	lprintf("emu_ReloadRom(%s)\n", rom_fname_in);
+
+	rom_fname = strdup(rom_fname_in);
+	if (rom_fname == NULL)
+		return 0;
 
+	used_rom_name = rom_fname;
 	get_ext(rom_fname, ext);
 
-	// check for movie file
+	// early cleanup
+	PicoPatchUnload();
 	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) {
-			me_update_msg("Failed to open movie.");
-			return 0;
+		if (!movie_file) {
+			menu_update_msg("Failed to open movie.");
+			goto out;
 		}
 		fseek(movie_file, 0, SEEK_END);
 		movie_size = ftell(movie_file);
 		fseek(movie_file, 0, SEEK_SET);
-		if(movie_size < 64+3) {
-			me_update_msg("Invalid GMV file.");
+		if (movie_size < 64+3) {
+			menu_update_msg("Invalid GMV file.");
 			fclose(movie_file);
-			return 0;
+			goto out;
 		}
 		movie_data = malloc(movie_size);
-		if(movie_data == NULL) {
-			me_update_msg("low memory.");
+		if (movie_data == NULL) {
+			menu_update_msg("low memory.");
 			fclose(movie_file);
-			return 0;
+			goto out;
 		}
-		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.");
-			return 0;
+			menu_update_msg("Invalid GMV file.");
+			goto out;
 		}
 		dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);
 		if (!dummy) {
-			me_update_msg("Could't find a ROM for movie.");
-			return 0;
+			menu_update_msg("Could't find a ROM for movie.");
+			goto out;
 		}
 		get_ext(rom_fname, ext);
 		lprintf("gmv loaded for %s\n", rom_fname);
@@ -436,20 +560,23 @@ int emu_reload_rom(char *rom_fname)
 		PicoPatchLoad(rom_fname);
 		dummy = try_rfn_cut(rom_fname) || try_rfn_cut(rom_fname);
 		if (!dummy) {
-			me_update_msg("Could't find a ROM to patch.");
-			return 0;
+			menu_update_msg("Could't find a ROM to patch.");
+			goto out;
 		}
 		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;
+		menu_update_msg("Not a ROM/CD img selected.");
+		goto out;
 	}
 
 	shutdown_MCD();
-	PicoPatchUnload();
+	PicoCartUnload();
+	rom_loaded = 0;
+
+	PicoAHW = 0;
 
 	if (media_type == PM_CD)
 	{
@@ -460,8 +587,8 @@ int emu_reload_rom(char *rom_fname)
 			// valid CD image, check for BIOS..
 
 			// we need to have config loaded at this point
-			ret = emu_read_config(1, 0);
-			if (!ret) emu_read_config(0, 0);
+			ret = emu_read_config(rom_fname, 0);
+			if (!ret) emu_read_config(NULL, 0);
 			cfg_loaded = 1;
 
 			if (PicoRegionOverride) {
@@ -470,14 +597,14 @@ int emu_reload_rom(char *rom_fname)
 					(cd_region == 8 ? "EU" : "JAP") : "USA");
 			}
 			if (!find_bios(cd_region, &used_rom_name))
-				return 0;
+				goto out;
 
 			get_ext(used_rom_name, ext);
 			PicoAHW |= PAHW_MCD;
 		}
 		else {
-			me_update_msg("Invalid CD image");
-			return 0;
+			menu_update_msg("Invalid CD image");
+			goto out;
 		}
 	}
 	else if (media_type == PM_MARK3) {
@@ -487,22 +614,21 @@ int emu_reload_rom(char *rom_fname)
 
 	rom = pm_open(used_rom_name);
 	if (rom == NULL) {
-		me_update_msg("Failed to open ROM");
-		return 0;
+		menu_update_msg("Failed to open ROM");
+		goto out;
 	}
 
 	menu_romload_prepare(used_rom_name); // also CD load
-
-	PicoCartUnload();
-	rom_loaded = 0;
+	menu_romload_started = 1;
+	used_rom_name = NULL; // uses static_buff
 
 	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 fail;
+		if      (ret == 2) menu_update_msg("Out of memory");
+		else if (ret == 3) menu_update_msg("Read failed");
+		else               menu_update_msg("PicoCartLoad() failed.");
+		goto out;
 	}
 
 	// detect wrong files
@@ -517,21 +643,22 @@ int emu_reload_rom(char *rom_fname)
 	}
 
 	if (bad_rom) {
-		me_update_msg("Bad ROM detected.");
-		goto fail;
+		menu_update_msg("Bad ROM detected.");
+		goto out;
 	}
 
 	// 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, 0);
-		if (!ret) emu_read_config(0, 0);
+		ret = emu_read_config(rom_fname, 0);
+		if (!ret) emu_read_config(NULL, 0);
 	}
 
-	if (PicoCartInsert(rom_data, rom_size)) {
-		me_update_msg("Failed to load ROM.");
-		goto fail;
+	emu_make_path(static_buff, "carthw.cfg", sizeof(static_buff));
+	if (PicoCartInsert(rom_data, rom_size, static_buff)) {
+		menu_update_msg("Failed to load ROM.");
+		goto out;
 	}
 
 	// insert CD if it was detected
@@ -540,12 +667,13 @@ int emu_reload_rom(char *rom_fname)
 		if (ret != 0) {
 			PicoCartUnload();
 			rom_data = NULL; // freed by unload
-			me_update_msg("Insert_CD() failed, invalid CD image?");
-			goto fail;
+			menu_update_msg("Insert_CD() failed, invalid CD image?");
+			goto out;
 		}
 	}
 
 	menu_romload_end();
+	menu_romload_started = 0;
 
 	if (PicoPatches) {
 		PicoPatchPrepare();
@@ -573,21 +701,7 @@ 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;
 	}
 
@@ -599,13 +713,14 @@ int emu_reload_rom(char *rom_fname)
 	if (currentConfig.EmuOpt & EOPT_EN_SRAM)
 		emu_save_load_game(1, 1);
 
-	return 1;
-
-fail:
-	if (rom_data)
+	retval = 1;
+out:
+	if (retval == 0 && rom_data)
 		free(rom_data);
-	menu_romload_end();
-	return 0;
+	if (menu_romload_started)
+		menu_romload_end();
+	free(rom_fname);
+	return retval;
 }
 
 int emu_swap_cd(const char *fname)
@@ -617,7 +732,7 @@ int emu_swap_cd(const char *fname)
 	if (cd_type != CIT_NOT_CD)
 		ret = Insert_CD(fname, cd_type);
 	if (ret != 0) {
-		me_update_msg("Load failed, invalid CD image?");
+		menu_update_msg("Load failed, invalid CD image?");
 		return 0;
 	}
 
@@ -626,29 +741,7 @@ int emu_swap_cd(const char *fname)
 	return 1;
 }
 
-static void romfname_ext(char *dst, const char *prefix, const char *ext)
-{
-	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);
-	}
-#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);
-}
-
+// <base dir><end>
 void emu_make_path(char *buff, const char *end, int size)
 {
 	int pos, end_len;
@@ -674,6 +767,28 @@ 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));
@@ -682,9 +797,11 @@ 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;
@@ -692,16 +809,16 @@ int emu_read_config(int game, int no_defaults)
 	if (!no_defaults)
 		emu_set_defconfig();
 
-	if (!game)
+	if (rom_fname == NULL)
 	{
+		// 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");
@@ -730,7 +847,7 @@ int emu_read_config(int game, int no_defaults)
 		}
 	}
 
-	plat_validate_config();
+	pemu_validate_config();
 
 	// some sanity checks
 #ifdef PSP
@@ -762,7 +879,7 @@ 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);
 	}
 
@@ -856,20 +973,21 @@ 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)
 	{
 		strcpy(ext, (PicoAHW & PAHW_MCD) ? ".brm" : ".srm");
-		romfname_ext(saveFname, (PicoAHW & PAHW_MCD) ? "brm"PATH_SEP : "srm"PATH_SEP, ext);
+		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, NULL, ext);
+		romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
 		if (try_ropen_file(saveFname))
 			return saveFname;
 	}
@@ -883,15 +1001,15 @@ char *emu_get_save_fname(int load, int is_sram, int slot)
 		strcat(ext, ext_main);
 
 		if (!load) {
-			romfname_ext(saveFname, "mds" PATH_SEP, ext);
+			romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
 			return saveFname;
 		}
 		else {
-			romfname_ext(saveFname, "mds" PATH_SEP, ext);
+			romfname_ext(saveFname, sizeof(static_buff), "mds" PATH_SEP, ext);
 			if (try_ropen_file(saveFname))
 				return saveFname;
 
-			romfname_ext(saveFname, NULL, ext);
+			romfname_ext(saveFname, sizeof(static_buff), NULL, ext);
 			if (try_ropen_file(saveFname))
 				return saveFname;
 
@@ -901,7 +1019,7 @@ char *emu_get_save_fname(int load, int is_sram, int slot)
 				sprintf(ext, ".%i", slot);
 			strcat(ext, ext_othr);
 
-			romfname_ext(saveFname, "mds"PATH_SEP, ext);
+			romfname_ext(saveFname, sizeof(static_buff), "mds"PATH_SEP, ext);
 			if (try_ropen_file(saveFname))
 				return saveFname;
 		}
@@ -910,7 +1028,7 @@ char *emu_get_save_fname(int load, int is_sram, int slot)
 	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;
 }
@@ -938,7 +1056,7 @@ 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 +1067,19 @@ 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 +1155,15 @@ 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)
 {
 	PicoReset();
@@ -1126,9 +1255,9 @@ 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];
@@ -1144,16 +1273,16 @@ 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 STATE" : "SAVING STATE");
@@ -1179,7 +1308,7 @@ static void run_events_ui(unsigned int which)
 		}
 
 		emu_status_msg("SAVE SLOT %i [%s]", state_slot,
-			emu_check_save_file(state_slot) ? "USED" : "FREE");
+			emu_check_save_file(state_slot, NULL) ? "USED" : "FREE");
 	}
 	if (which & PEV_MENU)
 		engineState = PGS_Menu;
@@ -1238,17 +1367,53 @@ 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);
 
@@ -1256,6 +1421,8 @@ void emu_init(void)
 	PicoMessage = plat_status_msg_busy_next;
 	PicoMCDopenTray = emu_tray_open;
 	PicoMCDcloseTray = emu_tray_close;
+
+	sndout_init();
 }
 
 void emu_finish(void)
@@ -1275,7 +1442,68 @@ void emu_finish(void)
 #endif
 	}
 
+	pprof_finish();
+
 	PicoExit();
+	sndout_exit();
+}
+
+static void snd_write_nonblocking(int len)
+{
+	sndout_write_nb(PsndOut, len);
+}
+
+void emu_sound_start(void)
+{
+	PsndOut = NULL;
+
+	if (currentConfig.EmuOpt & EOPT_EN_SOUND)
+	{
+		int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;
+
+		PsndRerate(Pico.m.frame_count ? 1 : 0);
+
+		printf("starting audio: %i len: %i stereo: %i, pal: %i\n",
+			PsndRate, PsndLen, is_stereo, Pico.m.pal);
+		sndout_start(PsndRate, is_stereo);
+		PicoWriteSound = snd_write_nonblocking;
+		plat_update_volume(0, 0);
+		memset(sndBuffer, 0, sizeof(sndBuffer));
+		PsndOut = sndBuffer;
+	}
+}
+
+void emu_sound_stop(void)
+{
+	sndout_stop();
+}
+
+void emu_sound_wait(void)
+{
+	sndout_wait();
+}
+
+static void emu_loop_prep(void)
+{
+	static int pal_old = -1;
+	static int filter_old = -1;
+
+	if (currentConfig.CPUclock != plat_target_cpu_clock_get())
+		plat_target_cpu_clock_set(currentConfig.CPUclock);
+
+	if (Pico.m.pal != pal_old) {
+		plat_target_lcdrate_set(Pico.m.pal);
+		pal_old = Pico.m.pal;
+	}
+
+	if (currentConfig.filter != filter_old) {
+		plat_target_hwfilter_set(currentConfig.filter);
+		filter_old = currentConfig.filter;
+	}
+
+	plat_target_gamma_set(currentConfig.gamma, 0);
+
+	pemu_loop_prep();
 }
 
 static void skip_frame(int do_audio)
@@ -1293,7 +1521,7 @@ 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 +1530,18 @@ 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;
+
+	PicoLoopPrepare();
+
+	// prepare CD buffer
+	if (PicoAHW & PAHW_MCD)
+		PicoCDBufferInit();
+
+	plat_video_loop_prepare();
+	emu_loop_prep();
+	pemu_sound_start();
 
 	/* number of ticks per frame */
 	if (Pico.m.pal) {
@@ -1314,12 +1552,6 @@ void emu_loop(void)
 		target_frametime = ms_to_ticks(1000) / 60 + 1;
 	}
 
-	// prepare CD buffer
-	if (PicoAHW & PAHW_MCD)
-		PicoCDBufferInit();
-
-	pemu_loop_prep();
-
 	timestamp_fps = get_ticks();
 	reset_timing = 1;
 
@@ -1332,7 +1564,8 @@ void emu_loop(void)
 	{
 		unsigned int timestamp;
 		int diff, diff_lim;
-		int modes;
+
+		pprof_start(main);
 
 		timestamp = get_ticks();
 		if (reset_timing) {
@@ -1359,13 +1592,6 @@ 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))
 		{
@@ -1379,6 +1605,7 @@ void emu_loop(void)
 			}
 			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);
@@ -1396,17 +1623,15 @@ void emu_loop(void)
 		{
 			if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && currentConfig.Frameskip >= 0)
 				pframes_done = 0;
-			else {
+			else
 				pframes_done -= target_fps;
-				/* don't allow it to drift during heavy slowdowns */
-				if (pframes_done < -5) {
-					reset_timing = 1;
-					continue;
-				}
-				if (pframes_done < -2)
-					pframes_done = -2;
+			if (pframes_done < -2) {
+				/* don't drag more than 2 frames behind */
+				pframes_done = -2;
+				timestamp_base = timestamp - 2 * target_frametime;
 			}
-			timestamp_base += ms_to_ticks(1000);
+			else
+				timestamp_base += ms_to_ticks(1000);
 		}
 
 		diff = timestamp - timestamp_base;
@@ -1420,7 +1645,7 @@ 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
@@ -1431,22 +1656,23 @@ void emu_loop(void)
 		else if (diff > diff_lim)
 		{
 			/* no time left for this frame - skip */
-			if (diff - diff_lim >= ms_to_ticks(200)) {
-				/* if too much behind, reset instead */
-				reset_timing = 1;
+			/* 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();
-			skip_frame(diff < diff_lim + target_frametime * 2);
-			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))
+		if (!reset_timing && !(currentConfig.EmuOpt & (EOPT_NO_FRMLIMIT|EOPT_EXT_FRMLIMIT)))
 		{
 			timestamp = get_ticks();
 			diff = timestamp - timestamp_base;
@@ -1461,9 +1687,13 @@ void emu_loop(void)
 			}
 		}
 
-		pemu_update_display(fpsbuff, notice_msg);
+		// 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);
@@ -1476,6 +1706,7 @@ void emu_loop(void)
 	}
 
 	pemu_loop_end();
+	emu_sound_stop();
 
 	// pemu_loop_end() might want to do 1 frame for bg image,
 	// so free CD buffer here