X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=platform%2Fgp2x%2Femu.c;h=f43f9b72b4d3c8d50d867169669fbf9a1a6de945;hb=99bdfd31b8708f8059fbc16ec8be90cb8d7c8bc3;hp=0e4fdd74b1725f51a4cbb42de7d7bae7b9c10e6a;hpb=cc68a136aa179a5f32fe40208371eb9c2b0aadae;p=picodrive.git

diff --git a/platform/gp2x/emu.c b/platform/gp2x/emu.c
index 0e4fdd7..683e267 100644
--- a/platform/gp2x/emu.c
+++ b/platform/gp2x/emu.c
@@ -1,27 +1,36 @@
-// (c) Copyright 2006 notaz, All rights reserved.
-// Free for non-commercial use.
-
-// For commercial use, separate licencing terms must be obtained.
+/*
+ * (c) Copyright 2006-2010 notaz, All rights reserved.
+ *
+ * For performance reasons 3 renderers are exported for both MD and 32x modes:
+ * - 16bpp line renderer
+ * - 8bpp line renderer (slightly faster)
+ * - 8bpp tile renderer
+ * In 32x mode:
+ * - 32x layer is overlayed on top of 16bpp one
+ * - line internal one done on PicoDraw2FB, then mixed with 32x
+ * - tile internal one done on PicoDraw2FB, then mixed with 32x
+ */
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <sys/time.h>
-#include <linux/limits.h>
-#include <ctype.h>
 #include <unistd.h>
 
-#include <stdarg.h>
-
-#include "emu.h"
-#include "gp2x.h"
-#include "usbjoy.h"
-#include "menu.h"
-#include "asmutils.h"
-#include "cpuctrl.h"
-
-#include "Pico/PicoInt.h"
-#include "zlib/zlib.h"
-
+#include "../libpicofe/gp2x/plat_gp2x.h"
+#include "../libpicofe/gp2x/soc.h"
+#include "../libpicofe/input.h"
+#include "../libpicofe/plat.h"
+#include "../libpicofe/gp2x/soc_pollux.h"
+#include "../common/menu_pico.h"
+#include "../common/arm_utils.h"
+#include "../common/emu.h"
+#include "../common/config_file.h"
+#include "../common/version.h"
+#include "plat.h"
+
+#include <pico/pico_int.h>
+#include <pico/patch.h>
+#include <pico/sound/mix.h>
+#include <zlib.h>
 
 #ifdef BENCHMARK
 #define OSD_FPS_X 220
@@ -29,1093 +38,725 @@
 #define OSD_FPS_X 260
 #endif
 
-// PicoPad[] format: SACB RLDU
-char *actionNames[] = {
-	"UP", "DOWN", "LEFT", "RIGHT", "B", "C", "A", "START",
-	0, 0, 0, 0, 0, 0, 0, 0, // Z, Y, X, MODE (enabled only when needed), ?, ?, ?, ?
-	0, 0, 0, 0, 0, 0, 0, "ENTER MENU", // player2_flag, ?, ?, ?, ?, ?, ?, menu
-	"NEXT SAVE SLOT", "PREV SAVE SLOT", "SWITCH RENDERER", "SAVE STATE",
-	"LOAD STATE", "VOLUME UP", "VOLUME DOWN", "DONE"
-};
-
-int engineState;
-int select_exits = 0;
-char *PicoConfigFile = "picoconfig.bin";
-currentConfig_t currentConfig;
-
-char romFileName[PATH_MAX];
-unsigned char *rom_data = NULL;
-
-extern int crashed_940;
-
-static char noticeMsg[64];					// notice msg to draw
-static struct timeval noticeMsgTime = { 0, 0 };	// when started showing
-static int reset_timing, osd_fps_x;
-static int combo_keys = 0, combo_acts = 0;	// keys and actions which need button combos
-static int gp2x_old_gamma = 100;
-static unsigned char *movie_data = NULL;
-static int movie_size = 0;
-static int frame_count = 0;
-unsigned char *framebuff = 0;  // temporary buffer for alt renderer
-int state_slot = 0;
 
-/*
-// tmp
-static FILE *logf = NULL;
+//extern int crashed_940;
 
-void pprintf(char *texto, ...)
-{
-	va_list args;
+static int osd_fps_x, osd_y, doing_bg_frame;
+const char *renderer_names[] = { "16bit accurate", " 8bit accurate", " 8bit fast", NULL };
+const char *renderer_names32x[] = { "accurate", "faster", "fastest", NULL };
+enum renderer_types { RT_16BIT, RT_8BIT_ACC, RT_8BIT_FAST, RT_COUNT };
 
-	va_start(args,texto);
-	vfprintf(logf,texto,args);
-	va_end(args);
-	fflush(logf);
-	sync();
-}
-*/
-// utilities
-static void strlwr(char* string)
+static int (*emu_scan_begin)(unsigned int num) = NULL;
+static int (*emu_scan_end)(unsigned int num) = NULL;
+
+
+void pemu_prep_defconfig(void)
 {
-	while ( (*string++ = (char)tolower(*string)) );
+	gp2x_soc_t soc;
+
+	defaultConfig.CPUclock = default_cpu_clock;
+	defaultConfig.renderer32x = RT_8BIT_FAST;
+	defaultConfig.analog_deadzone = 50;
+
+	soc = soc_detect();
+	if (soc == SOCID_MMSP2)
+		defaultConfig.s_PicoOpt |= POPT_EXT_FM;
+	else if (soc == SOCID_POLLUX) {
+		defaultConfig.EmuOpt |= EOPT_WIZ_TEAR_FIX|EOPT_SHOW_RTC;
+		defaultConfig.s_PicoOpt |= POPT_EN_MCD_GFX;
+	}
 }
 
-static int try_rfn_ext(char *ext)
+void pemu_validate_config(void)
 {
-	FILE *tmp;
-	char *p;
+	if (gp2x_dev_id != GP2X_DEV_GP2X)
+		PicoOpt &= ~POPT_EXT_FM;
+	if (gp2x_dev_id != GP2X_DEV_WIZ)
+		currentConfig.EmuOpt &= ~EOPT_WIZ_TEAR_FIX;
 
-	p = romFileName + strlen(romFileName) - 4;
-	if (p < romFileName) p = romFileName;
-	strcpy(p, ext);
+	if (currentConfig.gamma < 10 || currentConfig.gamma > 300)
+		currentConfig.gamma = 100;
 
-	if((tmp = fopen(romFileName, "rb"))) {
-		fclose(tmp);
-		return 1;
-	}
-	return 0;
+	if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 1024)
+		currentConfig.CPUclock = default_cpu_clock;
 }
 
-int emu_ReloadRom(void)
+static int get_renderer(void)
 {
-	unsigned int rom_size = 0;
-	char ext[5], *p;
-	FILE *rom;
-	int ret;
+	if (PicoAHW & PAHW_32X)
+		return currentConfig.renderer32x;
+	else
+		return currentConfig.renderer;
+}
 
-	printf("emu_ReloadRom(%s)\n", romFileName);
+static void change_renderer(int diff)
+{
+	int *r;
+	if (PicoAHW & PAHW_32X)
+		r = &currentConfig.renderer32x;
+	else
+		r = &currentConfig.renderer;
+	*r += diff;
 
-	// detect wrong extensions (.srm and .mds)
-	p = romFileName + strlen(romFileName) - 4;
-	if (p < romFileName) p = romFileName;
-	strncpy(ext, p, 4);
-	ext[4] = 0;
-	strlwr(ext);
+	// 8bpp fast is not there (yet?)
+	if ((PicoAHW & PAHW_SMS) && *r == RT_8BIT_FAST)
+		(*r)++;
 
-	if(!strcmp(ext, ".srm") || !strcmp(ext, "s.gz") || !strcmp(ext, ".mds")) { // s.gz ~ .mds.gz
-		sprintf(menuErrorMsg, "Not a ROM selected.");
-		return 0;
-	}
+	if      (*r >= RT_COUNT)
+		*r = 0;
+	else if (*r < 0)
+		*r = RT_COUNT - 1;
+}
 
-	// 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(romFileName, "rb");
-		if(!movie_file) {
-			sprintf(menuErrorMsg, "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) {
-			sprintf(menuErrorMsg, "Invalid GMV file.");
-			fclose(movie_file);
-			return 0;
-		}
-		movie_data = malloc(movie_size);
-		if(movie_data == NULL) {
-			sprintf(menuErrorMsg, "low memory.");
-			fclose(movie_file);
-			return 0;
-		}
-		fread(movie_data, 1, movie_size, movie_file);
-		fclose(movie_file);
-		if (strncmp((char *)movie_data, "Gens Movie TEST", 15) != 0) {
-			sprintf(menuErrorMsg, "Invalid GMV file.");
-			return 0;
-		}
-		dummy = try_rfn_ext(".zip") || try_rfn_ext(".bin") ||
-			try_rfn_ext(".smd") || try_rfn_ext(".gen");
-		if (!dummy) {
-			sprintf(menuErrorMsg, "Could't find a ROM for movie.");
-			return 0;
-		}
-	}
+#define is_16bit_mode() \
+	(get_renderer() == RT_16BIT || (PicoAHW & PAHW_32X))
 
-	rom = fopen(romFileName, "rb");
-	if(!rom) {
-		sprintf(menuErrorMsg, "Failed to open rom.");
-		return 0;
-	}
+static void (*osd_text)(int x, int y, const char *text);
 
-	if(rom_data) {
-		free(rom_data);
-		rom_data = 0;
-		rom_size = 0;
-	}
+static void osd_text8(int x, int y, const char *text)
+{
+	int len = strlen(text)*8;
+	int *p, i, h, offs;
 
-	// zipfile support
-	if(!strcasecmp(ext, ".zip")) {
-		fclose(rom);
-		ret = CartLoadZip(romFileName, &rom_data, &rom_size);
-		if(ret) {
-			if (ret == 4) strcpy(menuErrorMsg, "No ROMs in zip found.");
-			else sprintf(menuErrorMsg, "Unzip failed with code %i", ret);
-			printf("%s\n", menuErrorMsg);
-			return 0;
-		}
-	} else {
-		if( (ret = PicoCartLoad(rom, &rom_data, &rom_size)) ) {
-			sprintf(menuErrorMsg, "PicoCartLoad() failed.");
-			printf("%s\n", menuErrorMsg);
-			fclose(rom);
-			return 0;
-		}
-		fclose(rom);
+	len = (len+3) >> 2;
+	for (h = 0; h < 8; h++) {
+		offs = (x + g_screen_width * (y+h)) & ~3;
+		p = (int *) ((char *)g_screen_ptr + offs);
+		for (i = len; i; i--, p++)
+			*p = 0xe0e0e0e0;
 	}
+	emu_text_out8(x, y, text);
+}
 
-	// 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 short *)(rom_data+4)<<16)|(*(unsigned short *)(rom_data+6))) >= (int)rom_size) {
-		if (rom_data) free(rom_data);
-		rom_data = 0;
-		sprintf(menuErrorMsg, "Not a ROM selected.");
-		return 0;
-	}
+static void osd_text8_rot(int x, int y, const char *text)
+{
+	int len = strlen(text) * 8;
+	char *p = (char *)g_screen_ptr + 240*(320-x) + y;
 
-	printf("PicoCartInsert(%p, %d);\n", rom_data, rom_size);
-	if(PicoCartInsert(rom_data, rom_size)) {
-		sprintf(menuErrorMsg, "Failed to load ROM.");
-		return 0;
+	while (len--) {
+		memset(p, 0xe0, 8);
+		p -= 240;
 	}
 
-	// load config for this ROM
-	ret = emu_ReadConfig(1);
-	if (!ret)
-		emu_ReadConfig(0);
-
-	// emu_ReadConfig() might have messed currentConfig.lastRomFile
-	strncpy(currentConfig.lastRomFile, romFileName, sizeof(currentConfig.lastRomFile)-1);
-	currentConfig.lastRomFile[sizeof(currentConfig.lastRomFile)-1] = 0;
-
-	// additional movie stuff
-	if(movie_data) {
-		if(movie_data[0x14] == '6')
-		     PicoOpt |=  0x20; // 6 button pad
-		else PicoOpt &= ~0x20;
-		if(movie_data[0xF] >= 'A') {
-			//Pico.m.pal = movie_data[0x16] >> 7;
-			// TODO: bits 6 & 5
-		}
-		strcpy(noticeMsg, "MOVIE LOADED");
-	}
-	else
-	{
-		if(Pico.m.pal) {
-			strcpy(noticeMsg, "PAL SYSTEM / 50 FPS");
-		} else {
-			strcpy(noticeMsg, "NTSC SYSTEM / 60 FPS");
-		}
-	}
-	gettimeofday(&noticeMsgTime, 0);
+	emu_text_out8_rot(x, y, text);
+}
 
-	// load SRAM for this ROM
-	if(currentConfig.EmuOpt & 1)
-		emu_SaveLoadGame(1, 1);
+static void osd_text16_rot(int x, int y, const char *text)
+{
+	int len = strlen(text) * 8;
+	short *p = (short *)g_screen_ptr + 240*(320-x) + y;
 
-	frame_count = 0;
+	while (len--) {
+		memset(p, 0, 8*2);
+		p -= 240;
+	}
 
-	return 1;
+	emu_text_out16_rot(x, y, text);
 }
 
-
-void emu_Init(void)
+static void draw_cd_leds(void)
 {
-	// make temp buffer for alt renderer
-	framebuff = malloc((8+320)*(8+240+8));
-	if (!framebuff)
-	{
-		printf("framebuff == 0\n");
-	}
+	int led_reg, pitch, scr_offs, led_offs;
+	led_reg = Pico_mcd->s68k_regs[0];
 
-	PicoInit();
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
+		pitch = 240;
+		led_offs = -pitch * 6;
+		scr_offs = pitch * (320 - 4);
+	} else {
+		pitch = 320;
+		led_offs = 4;
+		scr_offs = pitch * 2 + 4;
+	}
+
+	if (!is_16bit_mode()) {
+	#define p(x) px[(x) >> 2]
+		// 8-bit modes
+		unsigned int *px = (unsigned int *)((char *)g_screen_ptr + scr_offs);
+		unsigned int col_g = (led_reg & 2) ? 0xc0c0c0c0 : 0xe0e0e0e0;
+		unsigned int col_r = (led_reg & 1) ? 0xd0d0d0d0 : 0xe0e0e0e0;
+		p(pitch*0) = p(pitch*1) = p(pitch*2) = col_g;
+		p(pitch*0 + led_offs) = p(pitch*1 + led_offs) = p(pitch*2 + led_offs) = col_r;
+	#undef p
+	} else {
+	#define p(x) px[(x)*2 >> 2] = px[((x)*2 >> 2) + 1]
+		// 16-bit modes
+		unsigned int *px = (unsigned int *)((short *)g_screen_ptr + scr_offs);
+		unsigned int col_g = (led_reg & 2) ? 0x06000600 : 0;
+		unsigned int col_r = (led_reg & 1) ? 0xc000c000 : 0;
+		p(pitch*0) = p(pitch*1) = p(pitch*2) = col_g;
+		p(pitch*0 + led_offs) = p(pitch*1 + led_offs) = p(pitch*2 + led_offs) = col_r;
+	#undef p
+	}
+}
 
-//	logf = fopen("log.txt", "w");
+static void draw_pico_ptr(void)
+{
+	unsigned short *p = (unsigned short *)g_screen_ptr;
+	int x, y, pitch = 320;
+
+	// only if pen enabled and for 16bit modes
+	if (pico_inp_mode == 0 || currentConfig.EmuOpt != RT_16BIT)
+		return;
+
+	x = pico_pen_x + PICO_PEN_ADJUST_X;
+	y = pico_pen_y + PICO_PEN_ADJUST_Y;
+	if (!(Pico.video.reg[12]&1) && !(PicoOpt & POPT_DIS_32C_BORDER))
+		x += 32;
+
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
+		pitch = 240;
+		p += (319 - x) * pitch + y;
+	} else
+		p += x + y * pitch;
+
+	p[0]       ^= 0xffff;
+	p[pitch-1] ^= 0xffff;
+	p[pitch]   ^= 0xffff;
+	p[pitch+1] ^= 0xffff;
+	p[pitch*2] ^= 0xffff;
 }
 
+/* rot thing for Wiz */
+static unsigned char __attribute__((aligned(4))) rot_buff[320*4*2];
 
-static void romfname_ext(char *dst, char *ext)
+static int EmuScanBegin16_rot(unsigned int num)
 {
-	char *p;
-
-	// make save filename
-	for (p = romFileName+strlen(romFileName)-1; p >= romFileName && *p != '/'; p--); p++;
-	strncpy(dst, p, 511);
-	dst[511-8] = 0;
-	if(dst[strlen(dst)-4] == '.') dst[strlen(dst)-4] = 0;
-	strcat(dst, ext);
+	Pico.est.DrawLineDest = rot_buff + (num & 3) * 320 * 2;
+	return 0;
 }
 
+static int EmuScanEnd16_rot(unsigned int num)
+{
+	if ((num & 3) != 3)
+		return 0;
+	rotated_blit16(g_screen_ptr, rot_buff, num + 1,
+		!(Pico.video.reg[12] & 1) && !(PicoOpt & POPT_EN_SOFTSCALE));
+	return 0;
+}
 
-static void find_combos(void)
+static int EmuScanBegin8_rot(unsigned int num)
 {
-	int act, u;
+	Pico.est.DrawLineDest = rot_buff + (num & 3) * 320;
+	return 0;
+}
 
-	// find out which keys and actions are combos
-	combo_keys = combo_acts = 0;
-	for (act = 0; act < 32; act++)
-	{
-		int keyc = 0;
-		if (act == 16) continue; // player2 flag
-		for (u = 0; u < 32; u++)
-		{
-			if (currentConfig.KeyBinds[u] & (1 << act)) keyc++;
-		}
-		if (keyc > 1)
-		{
-			// loop again and mark those keys and actions as combo
-			for (u = 0; u < 32; u++)
-			{
-				if (currentConfig.KeyBinds[u] & (1 << act)) {
-					combo_keys |= 1 << u;
-					combo_acts |= 1 << act;
-				}
-			}
-		}
-	}
-	// printf("combo keys/acts: %08x %08x\n", combo_keys, combo_acts);
+static int EmuScanEnd8_rot(unsigned int num)
+{
+	if ((num & 3) != 3)
+		return 0;
+	rotated_blit8(g_screen_ptr, rot_buff, num + 1,
+		!(Pico.video.reg[12] & 1));
+	return 0;
 }
 
+/* line doublers */
+static unsigned int ld_counter;
+static int ld_left, ld_lines;
 
-int emu_ReadConfig(int game)
+static int EmuScanBegin16_ld(unsigned int num)
 {
-	FILE *f;
-	char cfg[512];
-	int bread = 0;
-
-	if (!game)
-	{
-		// set default config
-		memset(&currentConfig, 0, sizeof(currentConfig));
-		currentConfig.lastRomFile[0] = 0;
-		currentConfig.EmuOpt  = 0x1f;
-		currentConfig.PicoOpt = 0x0f;
-		currentConfig.PsndRate = 22050;
-		currentConfig.PicoRegion = 0; // auto
-		currentConfig.Frameskip = -1; // auto
-		currentConfig.CPUclock = 200;
-		currentConfig.volume = 50;
-		currentConfig.KeyBinds[ 0] = 1<<0; // SACB RLDU
-		currentConfig.KeyBinds[ 4] = 1<<1;
-		currentConfig.KeyBinds[ 2] = 1<<2;
-		currentConfig.KeyBinds[ 6] = 1<<3;
-		currentConfig.KeyBinds[14] = 1<<4;
-		currentConfig.KeyBinds[13] = 1<<5;
-		currentConfig.KeyBinds[12] = 1<<6;
-		currentConfig.KeyBinds[ 8] = 1<<7;
-		currentConfig.KeyBinds[15] = 1<<26; // switch rend
-		currentConfig.KeyBinds[10] = 1<<27; // save state
-		currentConfig.KeyBinds[11] = 1<<28; // load state
-		currentConfig.KeyBinds[23] = 1<<29; // vol up
-		currentConfig.KeyBinds[22] = 1<<30; // vol down
-		currentConfig.gamma = 100;
-		strncpy(cfg, PicoConfigFile, 511);
-		cfg[511] = 0;
-	} else {
-		romfname_ext(cfg, ".pbcfg");
-	}
+	if ((signed int)(ld_counter - num) > 100)
+		ld_counter = 0;
 
-	printf("emu_ReadConfig: %s ", cfg);
-	f = fopen(cfg, "rb");
-	if (f) {
-		bread = fread(&currentConfig, 1, sizeof(currentConfig), f);
-		fclose(f);
-	}
-	printf((bread == sizeof(currentConfig)) ? "(ok)\n" : "(failed)\n");
-
-	PicoOpt = currentConfig.PicoOpt;
-	PsndRate = currentConfig.PsndRate;
-	PicoRegionOverride = currentConfig.PicoRegion;
-	if (PicoOpt & 0x20) {
-		actionNames[ 8] = "Z"; actionNames[ 9] = "Y";
-		actionNames[10] = "X"; actionNames[11] = "MODE";
-	}
-	// some sanity checks
-	if (currentConfig.CPUclock < 1 || currentConfig.CPUclock > 4096) currentConfig.CPUclock = 200;
-	if (currentConfig.gamma < 10 || currentConfig.gamma > 300) currentConfig.gamma = 100;
-	// if volume keys are unbound, bind them to volume control
-	if (!currentConfig.KeyBinds[23] && !currentConfig.KeyBinds[22]) {
-		currentConfig.KeyBinds[23] = 1<<29; // vol up
-		currentConfig.KeyBinds[22] = 1<<30; // vol down
-	}
+	if (emu_scan_begin)
+		return emu_scan_begin(ld_counter);
+	else
+		Pico.est.DrawLineDest = (char *)g_screen_ptr + 320 * ld_counter * gp2x_current_bpp / 8;
 
-	return (bread == sizeof(currentConfig));
+	return 0;
 }
 
-
-int emu_WriteConfig(int game)
+static int EmuScanEnd16_ld(unsigned int num)
 {
-	FILE *f;
-	char cfg[512];
-	int bwrite = 0;
+	void *oldline = Pico.est.DrawLineDest;
 
-	if (!game)
-	{
-		strncpy(cfg, PicoConfigFile, 511);
-		cfg[511] = 0;
-	} else {
-		romfname_ext(cfg, ".pbcfg");
-	}
+	if (emu_scan_end)
+		emu_scan_end(ld_counter);
+
+	ld_counter++;
+	ld_left--;
+	if (ld_left <= 0) {
+		ld_left = ld_lines;
 
-	printf("emu_WriteConfig: %s ", cfg);
-	f = fopen(cfg, "wb");
-	if (f) {
-		currentConfig.PicoOpt = PicoOpt;
-		currentConfig.PsndRate = PsndRate;
-		currentConfig.PicoRegion = PicoRegionOverride;
-		bwrite = fwrite(&currentConfig, 1, sizeof(currentConfig), f);
-		fflush(f);
-		fclose(f);
-		sync();
+		EmuScanBegin16_ld(num);
+		memcpy32(Pico.est.DrawLineDest, oldline, 320 * gp2x_current_bpp / 8 / 4);
+		if (emu_scan_end)
+			emu_scan_end(ld_counter);
+
+		ld_counter++;
 	}
-	printf((bwrite == sizeof(currentConfig)) ? "(ok)\n" : "(failed)\n");
 
-	return (bwrite == sizeof(currentConfig));
+	return 0;
 }
 
+static int localPal[0x100];
+static void (*vidcpyM2)(void *dest, void *src, int m32col, int with_32c_border);
+static int (*make_local_pal)(int fast_mode);
 
-void emu_Deinit(void)
+static int make_local_pal_md(int fast_mode)
 {
-	// save SRAM
-	if((currentConfig.EmuOpt & 1) && SRam.changed) {
-		emu_SaveLoadGame(0, 1);
-		SRam.changed = 0;
-	}
+	int pallen = 0xc0;
 
-	if (!(currentConfig.EmuOpt & 0x20))
-		emu_WriteConfig(0);
-	free(framebuff);
+	bgr444_to_rgb32(localPal, Pico.cram);
+	if (fast_mode)
+		return 0x40;
 
-	PicoExit();
-//	fclose(logf);
+	if (Pico.video.reg[0xC] & 8) { // shadow/hilight mode
+		bgr444_to_rgb32_sh(localPal, Pico.cram);
+		localPal[0xc0] = 0x0000c000;
+		localPal[0xd0] = 0x00c00000;
+		localPal[0xe0] = 0x00000000; // reserved pixels for OSD
+		localPal[0xf0] = 0x00ffffff;
+		pallen = 0x100;
+	}
+	else if (Pico.est.rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes
+		bgr444_to_rgb32(localPal+0x40, HighPal);
+		bgr444_to_rgb32(localPal+0x80, HighPal+0x40);
+	}
+	else
+		memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess
 
-	// restore gamma
-	if (gp2x_old_gamma != 100)
-		set_gamma(100);
+	return pallen;
 }
 
-
-void osd_text(int x, int y, char *text)
+static int make_local_pal_sms(int fast_mode)
 {
-	int len = strlen(text)*8;
+	unsigned short *spal = Pico.cram;
+	unsigned int *dpal = (void *)localPal;
+	unsigned int i, t;
 
-	if ((PicoOpt&0x10)||!(currentConfig.EmuOpt&0x80)) {
-		int *p, i, h, black, white;
-		if (PicoOpt&0x10) {
-			black = 0x40404040; white = 0x41;
-		} else {
-			black = 0xe0e0e0e0; white = 0xf0;
-		}
-		x &= ~3; // align x
-		len = (len+3) >> 2;
-		for (h = 0; h < 8; h++) {
-			p = (int *) ((unsigned char *) gp2x_screen+x+320*(y+h));
-			for (i = len; i; i--, p++) *p = black;
-		}
-		gp2x_text_out8_2(x, y, text, white);
-	} else {
-		int *p, i, h;
-		x &= ~1; // align x
-		len = (len+1) >> 1;
-		for (h = 0; h < 8; h++) {
-			p = (int *) ((unsigned short *) gp2x_screen+x+320*(y+h));
-			for (i = len; i; i--, p++) *p = (*p>>2)&0x39e7;
-		}
-		gp2x_text_out15(x, y, text);
+	for (i = 0x40; i > 0; i--) {
+		t = *spal++;
+		t = ((t & 0x0003) << 22) | ((t & 0x000c) << 12) | ((t & 0x0030) << 2);
+		t |= t >> 2;
+		t |= t >> 4;
+		*dpal++ = t;
 	}
-}
 
-static int EmuScan16(unsigned int num, void *sdata)
-{
-	if (!(Pico.video.reg[1]&8)) num += 8;
-	DrawLineDest = (unsigned short *) gp2x_screen + 320*(num+1);
-
-	return 0;
+	return 0x40;
 }
 
-static int EmuScan8(unsigned int num, void *sdata)
+void pemu_finalize_frame(const char *fps, const char *notice)
 {
-	if (!(Pico.video.reg[1]&8)) num += 8;
-	DrawLineDest = (unsigned char *)  gp2x_screen + 320*(num+1);
-
-	return 0;
-}
-
-static int localPal[0x100];
-static void (*vidCpyM2)(void *dest, void *src) = NULL;
+	int emu_opt = currentConfig.EmuOpt;
+	int ret;
 
-static void blit(char *fps, char *notice)
-{
-	if (PicoOpt&0x10) {
+	if (PicoAHW & PAHW_32X)
+		; // nothing to do
+	else if (get_renderer() == RT_8BIT_FAST)
+	{
 		// 8bit fast renderer
 		if (Pico.m.dirtyPal) {
 			Pico.m.dirtyPal = 0;
-			vidConvCpyRGB32(localPal, Pico.cram, 0x40);
+			ret = make_local_pal(1);
 			// feed new palette to our device
-			gp2x_video_setpalette(localPal, 0x40);
+			gp2x_video_setpalette(localPal, ret);
 		}
-		vidCpyM2((unsigned char *)gp2x_screen+320*8, framebuff+328*8);
-	} else if (!(currentConfig.EmuOpt&0x80)) {
+		// a hack for VR
+		if (PicoAHW & PAHW_SVP)
+			memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
+		// do actual copy
+		vidcpyM2(g_screen_ptr, PicoDraw2FB+328*8,
+			!(Pico.video.reg[12] & 1), !(PicoOpt & POPT_DIS_32C_BORDER));
+	}
+	else if (get_renderer() == RT_8BIT_ACC)
+	{
 		// 8bit accurate renderer
-		if (Pico.m.dirtyPal) {
+		if (Pico.m.dirtyPal)
+		{
 			Pico.m.dirtyPal = 0;
-			if(Pico.video.reg[0xC]&8) { // shadow/hilight mode
-				vidConvCpyRGB32(localPal, Pico.cram, 0x40);
-				vidConvCpyRGB32sh(localPal+0x40, Pico.cram, 0x40);
-				vidConvCpyRGB32hi(localPal+0x80, Pico.cram, 0x40);
-				blockcpy(localPal+0xc0, localPal+0x40, 0x40*4);
-				localPal[0xe0] = 0x00000000; // reserved pixels for OSD
-				localPal[0xf0] = 0x00ffffff;
-				gp2x_video_setpalette(localPal, 0x100);
-			} else if (rendstatus & 0x20) { // mid-frame palette changes
-				vidConvCpyRGB32(localPal, Pico.cram, 0x40);
-				vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);
-				vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);
-				gp2x_video_setpalette(localPal, 0xc0);
-			} else {
-				vidConvCpyRGB32(localPal, Pico.cram, 0x40);
-				gp2x_video_setpalette(localPal, 0x40);
-			}
+			ret = make_local_pal(0);
+			gp2x_video_setpalette(localPal, ret);
 		}
 	}
 
-	if (notice) osd_text(4, 232, notice);
-	if (currentConfig.EmuOpt & 2)
-		osd_text(osd_fps_x, 232, fps);
+	if (notice)
+		osd_text(4, osd_y, notice);
+	if (emu_opt & EOPT_SHOW_FPS)
+		osd_text(osd_fps_x, osd_y, fps);
+	if ((PicoAHW & PAHW_MCD) && (emu_opt & EOPT_EN_CD_LEDS))
+		draw_cd_leds();
+	if (PicoAHW & PAHW_PICO)
+		draw_pico_ptr();
+}
 
-	//gp2x_video_wait_vsync();
+void plat_video_flip(void)
+{
+	int stride = g_screen_width;
 	gp2x_video_flip();
 
-	if (!(PicoOpt&0x10)) {
-		if (!(Pico.video.reg[1]&8)) {
-			if (currentConfig.EmuOpt&0x80) {
-				DrawLineDest = (unsigned short *) gp2x_screen + 320*8;
-			} else {
-				DrawLineDest = (unsigned char  *) gp2x_screen + 320*8;
-			}
-		} else {
-			DrawLineDest = gp2x_screen;
-		}
-	}
+	if (is_16bit_mode())
+		stride *= 2;
+	PicoDrawSetOutBuf(g_screen_ptr, stride);
 }
 
-
-// clears whole screen or just the notice area (in all buffers)
-static void clearArea(int full)
+/* XXX */
+unsigned int plat_get_ticks_ms(void)
 {
-	if (PicoOpt&0x10) {
-		// 8bit fast renderer
-		if (full) gp2x_memset_all_buffers(0, 0x40, 320*240);
-		else      gp2x_memset_all_buffers(320*232, 0x40, 320*8);
-	} else if (currentConfig.EmuOpt&0x80) {
-		// 16bit accurate renderer
-		if (full) gp2x_memset_all_buffers(0, 0, 320*240*2);
-		else      gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);
-	} else {
-		// 8bit accurate renderer
-		if (full) gp2x_memset_all_buffers(0, 0xe0, 320*240);
-		else      gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
-	}
+	return gp2x_get_ticks_ms();
 }
 
-
-static void vidResetMode(void)
+unsigned int plat_get_ticks_us(void)
 {
-	if (PicoOpt&0x10) {
-		localPal[0x40] = 0;
-		localPal[0x41] = 0x00ffffff;
-		gp2x_video_changemode(8);
-		gp2x_video_setpalette(localPal, 0x42);
-		gp2x_memset_all_buffers(0, 0x40, 320*240);
-		gp2x_video_flip();
-	} else if (currentConfig.EmuOpt&0x80) {
-		gp2x_video_changemode(15);
-		PicoDrawSetColorFormat(1);
-		PicoScan = EmuScan16;
-		PicoScan(0, 0);
-	} else {
-		localPal[0xe0] = 0x00000000; // reserved pixels for OSD
-		localPal[0xf0] = 0x00ffffff;
-		gp2x_video_changemode(8);
-		gp2x_video_setpalette(localPal, 0x100);
-		gp2x_memset_all_buffers(0, 0xe0, 320*240);
-		gp2x_video_flip();
-		PicoDrawSetColorFormat(2);
-		PicoScan = EmuScan8;
-		PicoScan(0, 0);
-	}
-	Pico.m.dirtyPal = 1;
-	// reset scaling
-	gp2x_video_RGB_setscaling((PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);
+	return gp2x_get_ticks_us();
 }
 
-
-static int check_save_file(void)
+void plat_wait_till_us(unsigned int us_to)
 {
-	char saveFname[512];
-	char ext[16];
-	FILE *f;
-
-	ext[0] = 0;
-	if(state_slot > 0 && state_slot < 10) sprintf(ext, ".%i", state_slot);
-	strcat(ext, ".mds");
-	if(currentConfig.EmuOpt & 8) strcat(ext, ".gz");
-
-	romfname_ext(saveFname, ext);
-	if ((f = fopen(saveFname, "rb"))) {
-		fclose(f);
-		return 1;
-	}
-	return 0;
-}
+	unsigned int now;
 
-static void RunEvents(unsigned int which)
-{
-	if(which & 0x1800) { // save or load (but not both)
-		int do_it = 1;
-		if (!(which & 0x1000) && (currentConfig.EmuOpt & 0x200) && check_save_file()) {
-			unsigned long keys;
-			blit("", "OVERWRITE SAVE? (Y=yes, X=no)");
-			while( !((keys = gp2x_joystick_read(1)) & (GP2X_X|GP2X_Y)) )
-				usleep(50*1024);
-			if (keys & GP2X_X) do_it = 0;
-			clearArea(0);
-		}
-		if (do_it) {
-			blit("", (which & 0x1000) ? "LOADING GAME" : "SAVING GAME");
-			emu_SaveLoadGame(which & 0x1000, 0);
-		}
+	spend_cycles(1024);
+	now = plat_get_ticks_us();
 
-		reset_timing = 1;
+	while ((signed int)(us_to - now) > 512)
+	{
+		spend_cycles(1024);
+		now = plat_get_ticks_us();
 	}
-	if(which & 0x0400) { // switch renderer
-		if      (  PicoOpt&0x10)             { PicoOpt&=~0x10; currentConfig.EmuOpt |= 0x80; }
-		else if (!(currentConfig.EmuOpt&0x80)) PicoOpt|= 0x10;
-		else   currentConfig.EmuOpt &= ~0x80;
-
-		vidResetMode();
+}
 
-		if (PicoOpt&0x10) {
-			strcpy(noticeMsg, " 8bit fast renderer");
-		} else if (currentConfig.EmuOpt&0x80) {
-			strcpy(noticeMsg, "16bit accurate renderer");
-		} else {
-			strcpy(noticeMsg, " 8bit accurate renderer");
-		}
+void plat_video_wait_vsync(void)
+{
+	gp2x_video_wait_vsync();
+}
 
-		gettimeofday(&noticeMsgTime, 0);
-	}
-	if(which & 0x0300) {
-		if(which&0x0200) {
-			state_slot -= 1;
-			if(state_slot < 0) state_slot = 9;
+void plat_status_msg_clear(void)
+{
+	int is_8bit = !is_16bit_mode();
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
+		/* ugh.. */
+		int i, u, *p;
+		if (is_8bit) {
+			for (i = 0; i < 4; i++) {
+				p = (int *)gp2x_screens[i] + (240-8) / 4;
+				for (u = 320; u > 0; u--, p += 240/4)
+					p[0] = p[1] = 0xe0e0e0e0;
+			}
 		} else {
-			state_slot += 1;
-			if(state_slot > 9) state_slot = 0;
+			for (i = 0; i < 4; i++) {
+				p = (int *)gp2x_screens[i] + (240-8)*2 / 4;
+				for (u = 320; u > 0; u--, p += 240*2/4)
+					p[0] = p[1] = p[2] = p[3] = 0;
+			}
 		}
-		sprintf(noticeMsg, "SAVE SLOT %i [%s]", state_slot, check_save_file() ? "USED" : "FREE");
-		gettimeofday(&noticeMsgTime, 0);
-	}
-	if(which & 0x0080) {
-		engineState = PGS_Menu;
+		return;
 	}
-}
 
+	if (is_8bit)
+		gp2x_memset_all_buffers(320*232, 0xe0, 320*8);
+	else
+		gp2x_memset_all_buffers(320*232*2, 0, 320*8*2);
+}
 
-static void updateKeys(void)
+void plat_status_msg_busy_next(const char *msg)
 {
-	unsigned long keys, allActions[2] = { 0, 0 }, events;
-	static unsigned long prevEvents = 0;
-	int joy, i;
-
-	keys = gp2x_joystick_read(0);
-	if (keys & GP2X_SELECT) {
-		engineState = select_exits ? PGS_Quit : PGS_Menu;
-		// wait until select is released, so menu would not resume game
-		while (gp2x_joystick_read(1) & GP2X_SELECT) usleep(50*1000);
-	}
+	plat_status_msg_clear();
+	pemu_finalize_frame("", msg);
+	plat_video_flip();
+	emu_status_msg("");
 
-	keys &= CONFIGURABLE_KEYS;
+	/* assumption: msg_busy_next gets called only when
+	 * something slow is about to happen */
+	reset_timing = 1;
+}
 
-	for (i = 0; i < 32; i++)
-	{
-		if (keys & (1 << i)) {
-			int pl, acts = currentConfig.KeyBinds[i];
-			if (!acts) continue;
-			pl = (acts >> 16) & 1;
-			if (combo_keys & (1 << i)) {
-				int u = i+1, acts_c = acts & combo_acts;
-				// let's try to find the other one
-				if (acts_c)
-					for (; u < 32; u++)
-						if ( (currentConfig.KeyBinds[u] & acts_c) && (keys & (1 << u)) ) {
-							allActions[pl] |= acts_c;
-							keys &= ~((1 << i) | (1 << u));
-							break;
-						}
-				// add non-combo actions if combo ones were not found
-				if (!acts_c || u == 32)
-					allActions[pl] |= acts & ~combo_acts;
-			} else {
-				allActions[pl] |= acts;
-			}
-		}
-	}
+void plat_status_msg_busy_first(const char *msg)
+{
+	gp2x_memcpy_all_buffers(g_screen_ptr, 0, 320*240*2);
+	plat_status_msg_busy_next(msg);
+}
 
-	// add joy inputs
-	if (num_of_joys > 0)
-	{
-		gp2x_usbjoy_update();
-		for (joy = 0; joy < num_of_joys; joy++) {
-			int keys = gp2x_usbjoy_check2(joy);
-			for (i = 0; i < 32; i++) {
-				if (keys & (1 << i)) {
-					int acts = currentConfig.JoyBinds[joy][i];
-					int pl = (acts >> 16) & 1;
-					allActions[pl] |= acts;
-				}
-			}
-		}
-	}
+static void vid_reset_mode(void)
+{
+	int gp2x_mode = 16;
+	int renderer = get_renderer();
+
+	PicoOpt &= ~POPT_ALT_RENDERER;
+	emu_scan_begin = NULL;
+	emu_scan_end = NULL;
+
+	switch (renderer) {
+	case RT_16BIT:
+		PicoDrawSetOutFormat(PDF_RGB555, 0);
+		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
+		break;
+	case RT_8BIT_ACC:
+		PicoDrawSetOutFormat(PDF_8BIT, 0);
+		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width);
+		gp2x_mode = 8;
+		break;
+	case RT_8BIT_FAST:
+		PicoOpt |= POPT_ALT_RENDERER;
+		PicoDrawSetOutFormat(PDF_NONE, 0);
+		vidcpyM2 = vidcpy_m2;
+		gp2x_mode = 8;
+		break;
+	default:
+		printf("bad renderer\n");
+		break;
+	}
+
+	if (PicoAHW & PAHW_32X) {
+		// Wiz 16bit is an exception, uses line rendering due to rotation mess
+		if (renderer == RT_16BIT && (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)) {
+			PicoDrawSetOutFormat(PDF_RGB555, 1);
+		}
+		else {
+			PicoDrawSetOutFormat(PDF_NONE, 0);
+		}
+		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
+		gp2x_mode = 16;
+	}
+
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
+		if ((PicoAHW & PAHW_32X) || renderer == RT_16BIT) {
+			emu_scan_begin = EmuScanBegin16_rot;
+			emu_scan_end = EmuScanEnd16_rot;
+		}
+		else if (renderer == RT_8BIT_ACC) {
+			emu_scan_begin = EmuScanBegin8_rot;
+			emu_scan_end = EmuScanEnd8_rot;
+		}
+		else if (renderer == RT_8BIT_FAST)
+			vidcpyM2 = vidcpy_m2_rot;
+	}
+
+	PicoDrawSetCallbacks(emu_scan_begin, emu_scan_end);
+
+	if (is_16bit_mode())
+		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text16_rot : emu_osd_text16;
+	else
+		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text8_rot : osd_text8;
 
-	if(movie_data)
-	{
-		int offs = frame_count*3 + 0x40;
-		if (offs+3 > movie_size) {
-			free(movie_data);
-			movie_data = 0;
-			strcpy(noticeMsg, "END OF MOVIE.");
-			printf("END OF MOVIE.\n");
-			gettimeofday(&noticeMsgTime, 0);
-		} else {
-			// MXYZ SACB RLDU
-			PicoPad[0] = ~movie_data[offs]   & 0x8f; // ! SCBA RLDU
-			if(!(movie_data[offs]   & 0x10)) PicoPad[0] |= 0x40; // A
-			if(!(movie_data[offs]   & 0x20)) PicoPad[0] |= 0x10; // B
-			if(!(movie_data[offs]   & 0x40)) PicoPad[0] |= 0x20; // A
-			PicoPad[1] = ~movie_data[offs+1] & 0x8f; // ! SCBA RLDU
-			if(!(movie_data[offs+1] & 0x10)) PicoPad[1] |= 0x40; // A
-			if(!(movie_data[offs+1] & 0x20)) PicoPad[1] |= 0x10; // B
-			if(!(movie_data[offs+1] & 0x40)) PicoPad[1] |= 0x20; // A
-			PicoPad[0] |= (~movie_data[offs+2] & 0x0A) << 8; // ! MZYX
-			if(!(movie_data[offs+2] & 0x01)) PicoPad[0] |= 0x0400; // X
-			if(!(movie_data[offs+2] & 0x04)) PicoPad[0] |= 0x0100; // Z
-			PicoPad[1] |= (~movie_data[offs+2] & 0xA0) << 4; // ! MZYX
-			if(!(movie_data[offs+2] & 0x10)) PicoPad[1] |= 0x0400; // X
-			if(!(movie_data[offs+2] & 0x40)) PicoPad[1] |= 0x0100; // Z
-			if ((PicoPad[0] & 0x80) || (PicoPad[1] & 0x80))
-				printf("%d: start\n", frame_count);
-		}
+	gp2x_video_wait_vsync();
+	if (!is_16bit_mode()) {
+		// setup pal for 8-bit modes
+		localPal[0xc0] = 0x0000c000; // MCD LEDs
+		localPal[0xd0] = 0x00c00000;
+		localPal[0xe0] = 0x00000000; // reserved pixels for OSD
+		localPal[0xf0] = 0x00ffffff;
+		gp2x_video_setpalette(localPal, 0x100);
+		gp2x_memset_all_buffers(0, 0xe0, 320*240);
 	}
 	else
-	{
-		PicoPad[0] = (unsigned short) allActions[0];
-		PicoPad[1] = (unsigned short) allActions[1];
-	}
-	frame_count++;
+		gp2x_memset_all_buffers(0, 0, 320*240*2);
 
-	events = (allActions[0] | allActions[1]) >> 16;
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
+		gp2x_mode = -gp2x_mode;
 
-	// volume is treated in special way and triggered every frame
-	if(events & 0x6000) {
-		int vol = currentConfig.volume;
-		if (events & 0x2000) {
-			if (vol < 90) vol++;
-		} else {
-			if (vol >  0) vol--;
-		}
-		gp2x_sound_volume(vol, vol);
-		sprintf(noticeMsg, "VOL: %02i", vol);
-		gettimeofday(&noticeMsgTime, 0);
-		currentConfig.volume = vol;
-	}
+	gp2x_video_changemode(gp2x_mode, Pico.m.pal);
 
-	events &= ~prevEvents;
-	if (events) RunEvents(events);
+	Pico.m.dirtyPal = 1;
 
-	prevEvents = (allActions[0] | allActions[1]) >> 16;
-}
+	PicoOpt &= ~POPT_EN_SOFTSCALE;
+	if (currentConfig.scaling == EOPT_SCALE_SW)
+		PicoOpt |= POPT_EN_SOFTSCALE;
 
-static int snd_excess_add = 0, snd_excess_cnt = 0; // hack
+	// palette converters for 8bit modes
+	make_local_pal = (PicoAHW & PAHW_SMS) ? make_local_pal_sms : make_local_pal_md;
+}
 
-static void updateSound(void)
+void emu_video_mode_change(int start_line, int line_count, int is_32cols)
 {
-	int len = (PicoOpt&8)?PsndLen*2:PsndLen;
-
-	snd_excess_cnt += snd_excess_add;
-	if (snd_excess_cnt >= 0x10000) {
-		snd_excess_cnt -= 0x10000;
-		if (PicoOpt&8) {
-			PsndOut[len]   = PsndOut[len-2];
-			PsndOut[len+1] = PsndOut[len-1];
-			len+=2;
-		} else {
-			PsndOut[len]   = PsndOut[len-1];
-			len++;
-		}
-	}
+	int scalex = 320, scaley = 240;
+	int ln_offs = 0;
 
-	gp2x_sound_write(PsndOut, len<<1);
-}
+	if (doing_bg_frame)
+		return;
 
+	osd_fps_x = OSD_FPS_X;
+	osd_y = 232;
 
-static void SkipFrame(int do_sound)
-{
-	void *sndbuff_tmp = 0;
-	if (PsndOut && !do_sound) {
-		sndbuff_tmp = PsndOut;
-		PsndOut = 0;
+	/* set up hwscaling here */
+	PicoOpt &= ~POPT_DIS_32C_BORDER;
+	if (is_32cols && currentConfig.scaling == EOPT_SCALE_HW) {
+		scalex = 256;
+		PicoOpt |= POPT_DIS_32C_BORDER;
+		osd_fps_x = OSD_FPS_X - 64;
 	}
 
-	PicoSkipFrame=1;
-	PicoFrame();
-	PicoSkipFrame=0;
-
-	if (sndbuff_tmp && !do_sound) {
-		PsndOut = sndbuff_tmp;
+	if (currentConfig.vscaling == EOPT_SCALE_HW) {
+		ln_offs = start_line;
+		scaley = line_count;
+		osd_y = start_line + line_count - 8;
 	}
-}
 
+	gp2x_video_RGB_setscaling(ln_offs, scalex, scaley);
 
-static void simpleWait(int thissec, int lim_time)
-{
-	struct timeval tval;
-
-	spend_cycles(1024);
-	gettimeofday(&tval, 0);
-	if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
-
-	while(tval.tv_usec < lim_time)
-	{
-		spend_cycles(1024);
-		gettimeofday(&tval, 0);
-		if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
+	/* line doubling */
+	if (currentConfig.vscaling == EOPT_SCALE_SW && line_count < 240) {
+		ld_lines = ld_left = line_count / (240 - line_count);
+		PicoDrawSetCallbacks(EmuScanBegin16_ld, EmuScanEnd16_ld);
 	}
-}
 
+	// clear whole screen in all buffers
+	if (!is_16bit_mode())
+		gp2x_memset_all_buffers(0, 0xe0, 320*240);
+	else
+		gp2x_memset_all_buffers(0, 0, 320*240*2);
+}
 
-void emu_Loop(void)
+void plat_video_toggle_renderer(int change, int is_menu_call)
 {
-	static int gp2x_old_clock = 200;
-	static int PsndRate_old = 0, PicoOpt_old = 0, PsndLen_real = 0, pal_old = 0;
-	char fpsbuff[24]; // fps count c string
-	struct timeval tval; // timing
-	int thissec = 0, frames_done = 0, frames_shown = 0, oldmodes = 0;
-	int target_fps, target_frametime, lim_time, i;
-	char *notice = 0;
-
-	printf("entered emu_Loop()\n");
-
-	if (gp2x_old_clock != currentConfig.CPUclock) {
-		printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);
-		set_FCLK(currentConfig.CPUclock);
-		gp2x_old_clock = currentConfig.CPUclock;
-		printf(" done\n");
-	}
+	change_renderer(change);
 
-	if (gp2x_old_gamma != currentConfig.gamma) {
-		set_gamma(currentConfig.gamma);
-		gp2x_old_gamma = currentConfig.gamma;
-		printf("updated gamma to %i\n", currentConfig.gamma);
-	}
+	if (is_menu_call)
+		return;
 
-	fpsbuff[0] = 0;
+	vid_reset_mode();
+	rendstatus_old = -1;
 
-	// make sure we are in correct mode
-	vidResetMode();
-	oldmodes = ((Pico.video.reg[12]&1)<<2) ^ 0xc;
-	find_combos();
+	if (PicoAHW & PAHW_32X)
+		emu_status_msg(renderer_names32x[get_renderer()]);
+	else
+		emu_status_msg(renderer_names[get_renderer()]);
+}
 
-	// pal/ntsc might have changed, reset related stuff
-	target_fps = Pico.m.pal ? 50 : 60;
-	target_frametime = 1000000/target_fps;
-	reset_timing = 1;
+#if 0 // TODO
+static void RunEventsPico(unsigned int events)
+{
+	int ret, px, py, lim_x;
+	static int pdown_frames = 0;
 
-	// prepare sound stuff
-	if(currentConfig.EmuOpt & 4) {
-		if(PsndRate != PsndRate_old || (PicoOpt&0x20b) != (PicoOpt_old&0x20b) || Pico.m.pal != pal_old || crashed_940) {
-			/* if 940 is turned off, we need it to be put back to sleep */
-			if (!(PicoOpt&0x200) && ((PicoOpt^PicoOpt_old)&0x200)) {
-				Reset940(1);
-				Pause940(1);
+	// for F200
+	ret = gp2x_touchpad_read(&px, &py);
+	if (ret >= 0)
+	{
+		if (ret > 35000)
+		{
+			if (pdown_frames++ > 5)
+				PicoPad[0] |= 0x20;
+
+			pico_pen_x = px;
+			pico_pen_y = py;
+			if (!(Pico.video.reg[12]&1)) {
+				pico_pen_x -= 32;
+				if (pico_pen_x <   0) pico_pen_x = 0;
+				if (pico_pen_x > 248) pico_pen_x = 248;
 			}
-			sound_rerate();
+			if (pico_pen_y > 224) pico_pen_y = 224;
 		}
-		//excess_samples = PsndRate - PsndLen*target_fps;
-		snd_excess_cnt = 0;
-		snd_excess_add = ((PsndRate - PsndLen*target_fps)<<16) / target_fps;
-		printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n", PsndRate, PsndLen, snd_excess_add, (PicoOpt&8)>>3, Pico.m.pal);
-		gp2x_start_sound(PsndRate, 16, (PicoOpt&8)>>3);
-		gp2x_sound_volume(currentConfig.volume, currentConfig.volume);
-		PicoWriteSound = updateSound;
-		PsndOut = calloc((PicoOpt&8) ? (PsndLen*4+4) : (PsndLen*2+2), 1);
-		PsndRate_old = PsndRate;
-		PsndLen_real = PsndLen;
-		PicoOpt_old  = PicoOpt;
-		pal_old = Pico.m.pal;
-	} else {
-		PsndOut = 0;
-	}
+		else
+			pdown_frames = 0;
 
-	// loop?
-	while (engineState == PGS_Running)
-	{
-		int modes;
+		//if (ret == 0)
+		//	PicoPicohw.pen_pos[0] = PicoPicohw.pen_pos[1] = 0x8000;
+	}
+}
+#endif
 
-		gettimeofday(&tval, 0);
-		if(reset_timing) {
-			reset_timing = 0;
-			thissec = tval.tv_sec;
-			frames_shown = frames_done = tval.tv_usec/target_frametime;
-		}
+void plat_update_volume(int has_changed, int is_up)
+{
+	static int prev_frame = 0, wait_frames = 0;
+	int need_low_volume = 0;
+	int vol = currentConfig.volume;
+	gp2x_soc_t soc;
 
-		// show notice message?
-		if(noticeMsgTime.tv_sec) {
-			static int noticeMsgSum;
-			if((tval.tv_sec*1000000+tval.tv_usec) - (noticeMsgTime.tv_sec*1000000+noticeMsgTime.tv_usec) > 2000000) { // > 2.0 sec
-				noticeMsgTime.tv_sec = noticeMsgTime.tv_usec = 0;
-				clearArea(0);
-				notice = 0;
-			} else {
-				int sum = noticeMsg[0]+noticeMsg[1]+noticeMsg[2];
-				if (sum != noticeMsgSum) { clearArea(0); noticeMsgSum = sum; }
-				notice = noticeMsg;
-			}
-		}
+	soc = soc_detect();
+	if ((PicoOpt & POPT_EN_STEREO) && soc == SOCID_MMSP2)
+		need_low_volume = 1;
 
-		// check for mode changes
-		modes = ((Pico.video.reg[12]&1)<<2)|(Pico.video.reg[1]&8);
-		if (modes != oldmodes) {
-			int scalex = 320;
-			osd_fps_x = OSD_FPS_X;
-			if (modes & 4) {
-				vidCpyM2 = vidCpyM2_40col;
-			} else {
-				if (PicoOpt & 0x100) {
-					vidCpyM2 = vidCpyM2_32col_nobord;
-					scalex = 256;
-					osd_fps_x = OSD_FPS_X - 64;
-				} else {
-					vidCpyM2 = vidCpyM2_32col;
-				}
-			}
-			gp2x_video_RGB_setscaling(scalex, 240);
-			oldmodes = modes;
-			clearArea(1);
+	if (has_changed)
+	{
+		if (need_low_volume && vol < 5 && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)
+			wait_frames++;
+		else {
+			wait_frames = 0;
+			plat_target_step_volume(&currentConfig.volume, is_up ? 1 : -1);
+			vol = currentConfig.volume;
 		}
+		emu_status_msg("VOL: %02i", vol);
+		prev_frame = Pico.m.frame_count;
+	}
 
-		// second changed?
-		if(thissec != tval.tv_sec) {
-#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);
-#else
-			if(currentConfig.EmuOpt & 2)
-				sprintf(fpsbuff, "%02i/%02i", frames_shown, frames_done);
-#endif
-			thissec = tval.tv_sec;
-
-			if(PsndOut == 0 && currentConfig.Frameskip >= 0) {
-				frames_done = frames_shown = 0;
-			} else {
-				// it is quite common for this implementation to leave 1 fame unfinished
-				// when second changes, but we don't want buffer to starve.
-				if(PsndOut && frames_done < target_fps && frames_done > target_fps-5) {
-					updateKeys();
-					SkipFrame(1); frames_done++;
-				}
-
-				frames_done  -= target_fps; if (frames_done  < 0) frames_done  = 0;
-				frames_shown -= target_fps; if (frames_shown < 0) frames_shown = 0;
-				if (frames_shown > frames_done) frames_shown = frames_done;
-			}
-		}
+	if (!need_low_volume)
+		return;
 
-		lim_time = (frames_done+1) * target_frametime;
-		if(currentConfig.Frameskip >= 0) { // frameskip enabled
-			for(i = 0; i < currentConfig.Frameskip; i++) {
-				updateKeys();
-				SkipFrame(1); frames_done++;
-				if (PsndOut) { // do framelimitting if sound is enabled
-					gettimeofday(&tval, 0);
-					if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
-					if(tval.tv_usec < lim_time) { // we are too fast
-						simpleWait(thissec, lim_time);
-					}
-				}
-				lim_time += target_frametime;
-			}
-		} else if(tval.tv_usec > lim_time) { // auto frameskip
-			// no time left for this frame - skip
-			updateKeys();
-			SkipFrame(tval.tv_usec < lim_time+target_frametime); frames_done++;
-			continue;
-		}
+	/* set the right mixer func */
+	if (vol >= 5)
+		PsndMix_32_to_16l = mix_32_to_16l_stereo;
+	else {
+		mix_32_to_16l_level = 5 - vol;
+		PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;
+	}
+}
 
-		updateKeys();
-		PicoFrame();
+void pemu_sound_start(void)
+{
+	gp2x_soc_t soc;
 
-		// check time
-		gettimeofday(&tval, 0);
-		if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
+	emu_sound_start();
 
-		// sleep if we are still too fast
-		if(PsndOut != 0 || currentConfig.Frameskip < 0)
-		{
-			// usleep sleeps for ~20ms minimum, so it is not a solution here
-			gettimeofday(&tval, 0);
-			if(thissec != tval.tv_sec) tval.tv_usec+=1000000;
-			if(tval.tv_usec < lim_time)
-			{
-				// we are too fast
-				simpleWait(thissec, lim_time);
-			}
+	if (currentConfig.EmuOpt & EOPT_EN_SOUND)
+	{
+		soc = soc_detect();
+		if (soc == SOCID_POLLUX) {
+			PsndRate = pollux_get_real_snd_rate(PsndRate);
+			PsndRerate(Pico.m.frame_count ? 1 : 0);
 		}
 
-		blit(fpsbuff, notice);
-
-		frames_done++; frames_shown++;
+		plat_target_step_volume(&currentConfig.volume, 0);
 	}
+}
 
-	// save SRAM
-	if((currentConfig.EmuOpt & 1) && SRam.changed) {
-		emu_SaveLoadGame(0, 1);
-		SRam.changed = 0;
-	}
+static const int sound_rates[] = { 44100, 32000, 22050, 16000, 11025, 8000 };
+
+void pemu_sound_stop(void)
+{
+	int i;
 
-	if (PsndOut != 0) {
-		free(PsndOut);
-		PsndOut = 0;
+	/* get back from Pollux pain */
+	PsndRate += 1000;
+	for (i = 0; i < ARRAY_SIZE(sound_rates); i++) {
+		if (PsndRate >= sound_rates[i]) {
+			PsndRate = sound_rates[i];
+			break;
+		}
 	}
 }
 
-
-void emu_ResetGame(void)
+void pemu_forced_frame(int no_scale, int do_emu)
 {
-	PicoReset(0);
-	reset_timing = 1;
-}
+	doing_bg_frame = 1;
+	PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
+	PicoDrawSetCallbacks(NULL, NULL);
+	Pico.m.dirtyPal = 1;
 
+	emu_cmn_forced_frame(no_scale, do_emu);
 
-size_t gzRead2(void *p, size_t _size, size_t _n, void *file)
-{
-	return gzread(file, p, _n);
+	g_menubg_src_ptr = g_screen_ptr;
+	doing_bg_frame = 0;
 }
 
-
-size_t gzWrite2(void *p, size_t _size, size_t _n, void *file)
+void plat_debug_cat(char *str)
 {
-	return gzwrite(file, p, _n);
 }
 
-typedef unsigned int (*STATE_SL_FUNC)(void *, unsigned int, unsigned int, void *);
+void plat_video_loop_prepare(void) 
+{
+	// make sure we are in correct mode
+	change_renderer(0);
+	vid_reset_mode();
+}
 
-int emu_SaveLoadGame(int load, int sram)
+void pemu_loop_prep(void)
 {
-	int ret = 0;
-	char saveFname[512];
+	if (gp2x_dev_id == GP2X_DEV_CAANOO)
+		in_set_config_int(in_name_to_id("evdev:pollux-analog"),
+			IN_CFG_ABS_DEAD_ZONE,
+			currentConfig.analog_deadzone);
 
-	// make save filename
-	romfname_ext(saveFname, "");
-	if(sram) strcat(saveFname, ".srm");
-	else {
-		if(state_slot > 0 && state_slot < 10) sprintf(saveFname, "%s.%i", saveFname, state_slot);
-		strcat(saveFname, ".mds");
-	}
+	// dirty buffers better go now than during gameplay
+	sync();
+	sleep(0);
+}
 
-	printf("saveLoad (%i, %i): %s\n", load, sram, saveFname);
-
-	if(sram) {
-		FILE *sramFile;
-		int sram_size = SRam.end-SRam.start+1;
-		if(SRam.reg_back & 4) sram_size=0x2000;
-		if(!SRam.data) 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);
-			fclose(sramFile);
-		} else {
-			// sram save needs some special processing
-			// see if we have anything to save
-			for(; sram_size > 0; sram_size--)
-				if(SRam.data[sram_size-1]) break;
-
-			if(sram_size) {
-				sramFile = fopen(saveFname, "wb");
-				ret = fwrite(SRam.data, 1, sram_size, sramFile);
-				ret = (ret != sram_size) ? -1 : 0;
-				fclose(sramFile);
-				sync();
-			}
-		}
-		return ret;
-	} else {
-		void *PmovFile = NULL;
-		// try gzip first
-		if(currentConfig.EmuOpt & 8) {
-			strcat(saveFname, ".gz");
-			if( (PmovFile = gzopen(saveFname, load ? "rb" : "wb")) ) {
-				areaRead  = gzRead2;
-				areaWrite = gzWrite2;
-				if(!load) gzsetparams(PmovFile, 9, Z_DEFAULT_STRATEGY);
-			} else
-				saveFname[strlen(saveFname)-3] = 0;
-		}
-		if(!PmovFile) { // gzip failed or was disabled
-			if( (PmovFile = fopen(saveFname, load ? "rb" : "wb")) ) {
-				areaRead  = (STATE_SL_FUNC) fread;
-				areaWrite = (STATE_SL_FUNC) fwrite;
-			}
-		}
-		if(PmovFile) {
-			PmovState(load ? 6 : 5, PmovFile);
-			strcpy(noticeMsg, load ? "GAME LOADED  " : "GAME SAVED   ");
-			if(areaRead == gzRead2)
-				 gzclose(PmovFile);
-			else fclose ((FILE *) PmovFile);
-			PmovFile = 0;
-			if (!load) sync();
-			else Pico.m.dirtyPal=1;
-		} else {
-			strcpy(noticeMsg, load ? "LOAD FAILED  " : "SAVE FAILED  ");
-			ret = -1;
-		}
+void pemu_loop_end(void)
+{
+	pemu_sound_stop();
 
-		gettimeofday(&noticeMsgTime, 0);
-		return ret;
-	}
+	/* do one more frame for menu bg */
+	pemu_forced_frame(0, 1);
 }
+