X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=platform%2Fgp2x%2Femu.c;h=7e9a132f381239f52ca40cda8f2576dae76edf90;hb=refs%2Fremotes%2Fgithub%2Fmaster;hp=dd4b6867c8d837040c1e45630184c2d1d7833d01;hpb=87b0845f3733166b491ae236feb8bc2eb0fca2ec;p=picodrive.git

diff --git a/platform/gp2x/emu.c b/platform/gp2x/emu.c
index dd4b6867..8a1fda83 100644
--- a/platform/gp2x/emu.c
+++ b/platform/gp2x/emu.c
@@ -1,28 +1,37 @@
-// (c) Copyright 2006-2009 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.
+ * (c) Copyright 2019-2024 irixxxx
+ *
+ * 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 .Draw2FB, then mixed with 32x
+ * - tile internal one done on .Draw2FB, then mixed with 32x
+ */
 
 #include <stdio.h>
 #include <stdlib.h>
-
-#include "plat_gp2x.h"
-#include "soc.h"
-#include "../common/plat.h"
-#include "../common/menu.h"
+#include <unistd.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/fonts.h"
 #include "../common/emu.h"
-#include "../common/config.h"
-#include "../linux/sndout_oss.h"
-#include "version.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/zlib.h>
-
-//#define PFRAMES
+#include <zlib.h>
 
 #ifdef BENCHMARK
 #define OSD_FPS_X 220
@@ -31,72 +40,80 @@
 #endif
 
 
-extern int crashed_940;
-
-static short __attribute__((aligned(4))) sndBuffer[2*(44100+100)/50];
-static unsigned char PicoDraw2FB_[(8+320) * (8+240+8)];
-unsigned char *PicoDraw2FB = PicoDraw2FB_;
-static int osd_fps_x;
+//extern int crashed_940;
 
-extern void *gp2x_screens[4];
+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 };
 
-int plat_get_root_dir(char *dst, int len)
-{
-	extern char **g_argv;
-	int j;
-
-	strncpy(dst, g_argv[0], len);
-	len -= 32; // reserve
-	if (len < 0) len = 0;
-	dst[len] = 0;
-	for (j = strlen(dst); j > 0; j--)
-		if (dst[j] == '/') { dst[j+1] = 0; break; }
+static int is_1stblanked;
+static int firstline, linecount;
+static int firstcol, colcount;
 
-	return j + 1;
-}
-
-
-static void scaling_update(void)
-{
-	PicoOpt &= ~(POPT_DIS_32C_BORDER|POPT_EN_SOFTSCALE);
-	switch (currentConfig.scaling) {
-		default:break;
-		case EOPT_SCALE_HW_H:
-		case EOPT_SCALE_HW_HV:
-			PicoOpt |= POPT_DIS_32C_BORDER;
-			break;
-		case EOPT_SCALE_SW_H:
-			PicoOpt |= POPT_EN_SOFTSCALE;
-			break;
-	}
-}
+static int (*emu_scan_begin)(unsigned int num) = NULL;
+static int (*emu_scan_end)(unsigned int num) = NULL;
 
 
 void pemu_prep_defconfig(void)
 {
 	gp2x_soc_t soc;
 
-	memset(&defaultConfig, 0, sizeof(defaultConfig));
-	defaultConfig.EmuOpt    = 0x9d | EOPT_RAM_TIMINGS|EOPT_CONFIRM_SAVE|EOPT_EN_CD_LEDS;
-	defaultConfig.s_PicoOpt = 0x0f | POPT_EN_MCD_PCM|POPT_EN_MCD_CDDA|POPT_EN_SVP_DRC|POPT_ACC_SPRITES;
-	defaultConfig.s_PsndRate = 44100;
-	defaultConfig.s_PicoRegion = 0; // auto
-	defaultConfig.s_PicoAutoRgnOrder = 0x184; // US, EU, JP
-	defaultConfig.s_PicoCDBuffers = 0;
-	defaultConfig.Frameskip = -1; // auto
 	defaultConfig.CPUclock = default_cpu_clock;
-	defaultConfig.volume = 50;
-	defaultConfig.gamma = 100;
-	defaultConfig.scaling = 0;
-	defaultConfig.turbo_rate = 15;
+	defaultConfig.renderer32x = RT_8BIT_ACC;
+	defaultConfig.analog_deadzone = 50;
 
 	soc = soc_detect();
 	if (soc == SOCID_MMSP2)
 		defaultConfig.s_PicoOpt |= POPT_EXT_FM;
-	else if (soc == SOCID_POLLUX)
+	else if (soc == SOCID_POLLUX) {
 		defaultConfig.EmuOpt |= EOPT_WIZ_TEAR_FIX|EOPT_SHOW_RTC;
+		defaultConfig.s_PicoOpt |= POPT_EN_MCD_GFX;
+	}
+}
+
+void pemu_validate_config(void)
+{
+	if (gp2x_dev_id != GP2X_DEV_GP2X)
+		PicoIn.opt &= ~POPT_EXT_FM;
+	if (gp2x_dev_id != GP2X_DEV_WIZ)
+		currentConfig.EmuOpt &= ~EOPT_WIZ_TEAR_FIX;
+
+	if (currentConfig.gamma < 10 || currentConfig.gamma > 300)
+		currentConfig.gamma = 100;
+
+	if (currentConfig.CPUclock < 10 || currentConfig.CPUclock > 1024)
+		currentConfig.CPUclock = default_cpu_clock;
+}
+
+static int get_renderer(void)
+{
+	if (doing_bg_frame)
+		return RT_16BIT;
+	if (PicoIn.AHW & PAHW_32X)
+		return currentConfig.renderer32x;
+	else
+		return currentConfig.renderer;
+}
+
+static void change_renderer(int diff)
+{
+	int *r;
+	if (PicoIn.AHW & PAHW_32X)
+		r = &currentConfig.renderer32x;
+	else
+		r = &currentConfig.renderer;
+	*r += diff;
+
+	if      (*r >= RT_COUNT)
+		*r = 0;
+	else if (*r < 0)
+		*r = RT_COUNT - 1;
 }
 
+#define is_16bit_mode() \
+	(currentConfig.renderer == RT_16BIT || (PicoIn.AHW & PAHW_32X) || doing_bg_frame)
+
 static void (*osd_text)(int x, int y, const char *text);
 
 static void osd_text8(int x, int y, const char *text)
@@ -114,21 +131,6 @@ static void osd_text8(int x, int y, const char *text)
 	emu_text_out8(x, y, text);
 }
 
-static void osd_text16(int x, int y, const char *text)
-{
-	int len = strlen(text)*8;
-	int *p, i, h, offs;
-
-	len = (len+1) >> 1;
-	for (h = 0; h < 8; h++) {
-		offs = (x + g_screen_width * (y+h)) & ~1;
-		p = (int *) ((short *)g_screen_ptr + offs);
-		for (i = len; i; i--, p++)
-			*p = (*p >> 2) & 0x39e7;
-	}
-	emu_text_out16(x, y, text);
-}
-
 static void osd_text8_rot(int x, int y, const char *text)
 {
 	int len = strlen(text) * 8;
@@ -170,7 +172,7 @@ static void draw_cd_leds(void)
 		scr_offs = pitch * 2 + 4;
 	}
 
-	if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP)) {
+	if (!is_16bit_mode()) {
 	#define p(x) px[(x) >> 2]
 		// 8-bit modes
 		unsigned int *px = (unsigned int *)((char *)g_screen_ptr + scr_offs);
@@ -193,43 +195,58 @@ static void draw_cd_leds(void)
 
 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 || (PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP))
-		return;
+	int up = (PicoPicohw.pen_pos[0]|PicoPicohw.pen_pos[1]) & 0x8000;
+	int x, y, pitch = 320, offs;
+	// storyware pages are actually squished, 2:1
+	int h = (pico_inp_mode == 1 ? 160 : linecount);
+	if (h < 224) y++;
 
-	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;
+	x = ((pico_pen_x * colcount  * ((1ULL<<32)/320 + 1)) >> 32) + firstcol;
+	y = ((pico_pen_y * h         * ((1ULL<<32)/224 + 1)) >> 32) + firstline;
 
 	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
 		pitch = 240;
-		p += (319 - x) * pitch + y;
+		offs = (319 - x) * pitch + y;
 	} else
-		p += x + y * pitch;
+		offs = x + y * pitch;
 
-	p[0]       ^= 0xffff;
-	p[pitch-1] ^= 0xffff;
-	p[pitch]   ^= 0xffff;
-	p[pitch+1] ^= 0xffff;
-	p[pitch*2] ^= 0xffff;
-}
+	if (is_16bit_mode()) {
+		unsigned short *p = (unsigned short *)g_screen_ptr + offs;
+		int o = (up ? 0x0000 : 0xffff), _ = (up ? 0xffff : 0x0000);
 
-static int EmuScanBegin16(unsigned int num)
-{
-	DrawLineDest = (unsigned short *) g_screen_ptr + g_screen_width * num;
+		p[-pitch-1] ^= o; p[-pitch] ^= _; p[-pitch+1] ^= _; p[-pitch+2] ^= o;
+		p[-1]       ^= _; p[0]      ^= o; p[1]        ^= o; p[2]        ^= _;
+		p[pitch-1]  ^= _; p[pitch]  ^= o; p[pitch+1]  ^= o; p[pitch+2]  ^= _;
+		p[2*pitch-1]^= o; p[2*pitch]^= _; p[2*pitch+1]^= _; p[2*pitch+2]^= o;
+	} else {
+		unsigned char *p = (unsigned char *)g_screen_ptr + offs;
+		int o = (up ? 0xe0 : 0xf0), _ = (up ? 0xf0 : 0xe0);
 
-	return 0;
+		p[-pitch-1] = o; p[-pitch] = _; p[-pitch+1] = _; p[-pitch+2] = o;
+		p[-1]       = _; p[0]      = o; p[1]        = o; p[2]        = _;
+		p[pitch-1]  = _; p[pitch]  = o; p[pitch+1]  = o; p[pitch+2]  = _;
+		p[2*pitch-1]= o; p[2*pitch]= _; p[2*pitch+1]= _; p[2*pitch+2]= o;
+	}
 }
 
-static int EmuScanBegin8(unsigned int num)
+static void clear_1st_column(int firstcol, int firstline, int linecount)
 {
-	DrawLineDest = (unsigned char *)  g_screen_ptr + g_screen_width * num;
+	int size = is_16bit_mode() ? 2 : 1;
+	int black = is_16bit_mode() ? 0 : 0xe0;
+	int i;
 
-	return 0;
+	// SMS 1st column blanked, replace with black
+	if ((currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) && !doing_bg_frame) {
+		int pitch = 240*size;
+		char *p = (char *)g_screen_ptr + (319-(firstcol-8))*pitch;
+		for (i = 0; i < 8; i++, p -= pitch)
+			memset(p+(firstline)*size, black, linecount*size);
+	} else {
+		int pitch = 320*size;
+		char *p = (char *)g_screen_ptr + (firstline)*pitch;
+		for (i = 0; i < linecount; i++, p += pitch)
+			memset(p+(firstcol-8)*size, black, 8*size);
+	}
 }
 
 /* rot thing for Wiz */
@@ -237,7 +254,7 @@ static unsigned char __attribute__((aligned(4))) rot_buff[320*4*2];
 
 static int EmuScanBegin16_rot(unsigned int num)
 {
-	DrawLineDest = rot_buff + (num & 3) * 320 * 2;
+	Pico.est.DrawLineDest = rot_buff + (num & 3) * 320 * 2;
 	return 0;
 }
 
@@ -246,13 +263,13 @@ 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));
+		!(Pico.video.reg[12] & 1) && !(PicoIn.opt & POPT_EN_SOFTSCALE));
 	return 0;
 }
 
 static int EmuScanBegin8_rot(unsigned int num)
 {
-	DrawLineDest = rot_buff + (num & 3) * 320;
+	Pico.est.DrawLineDest = rot_buff + (num & 3) * 320;
 	return 0;
 }
 
@@ -261,86 +278,197 @@ 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));
+		!(Pico.video.reg[12] & 1) && !(PicoIn.opt & POPT_EN_SOFTSCALE));
 	return 0;
 }
 
-int localPal[0x100];
-static void (*vidcpyM2)(void *dest, void *src, int m32col, int with_32c_border) = NULL;
+/* line doublers */
+static unsigned int ld_counter;
+static int ld_left, ld_lines; // numbers in Q1 format
+
+static int EmuScanBegin16_ld(unsigned int num)
+{
+	if ((signed int)(ld_counter - num) > 100) {
+		// vsync, offset so that the upscaled image is centered
+		ld_counter = 120 - (120-num) * (ld_lines+2)/ld_lines;
+		ld_left = ld_lines;
+	}
+
+	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;
 
-void pemu_update_display(const char *fps, const char *notice)
+	return 0;
+}
+
+static int EmuScanEnd16_ld(unsigned int num)
+{
+	void *oldline = Pico.est.DrawLineDest;
+
+	if (emu_scan_end)
+		emu_scan_end(ld_counter);
+
+	ld_counter++;
+	ld_left -= 2;
+	if (ld_left <= 0) {
+		ld_left += ld_lines;
+
+		EmuScanBegin16_ld(num);
+		memcpy(Pico.est.DrawLineDest, oldline, 320 * gp2x_current_bpp / 8);
+		if (emu_scan_end)
+			emu_scan_end(ld_counter);
+
+		ld_counter++;
+	}
+
+	return 0;
+}
+
+static int localPal[0x100];
+static int localPalSize;
+
+static void (*vidcpy8bit)(void *dest, void *src, int x_y, int w_h);
+static int (*make_local_pal)(int fast_mode);
+
+static int make_local_pal_md(int fast_mode)
+{
+	int pallen = 0x100;
+
+	if (fast_mode) {
+		bgr444_to_rgb32(localPal, PicoMem.cram, 64);
+		pallen = 0x40;
+		Pico.m.dirtyPal = 0;
+	}
+	else if (Pico.est.rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes
+		switch (Pico.est.SonicPalCount) {
+		case 3: bgr444_to_rgb32(localPal+0xc0, Pico.est.SonicPal+0xc0, 64);
+		case 2: bgr444_to_rgb32(localPal+0x80, Pico.est.SonicPal+0x80, 64);
+		case 1: bgr444_to_rgb32(localPal+0x40, Pico.est.SonicPal+0x40, 64);
+		default:bgr444_to_rgb32(localPal, Pico.est.SonicPal, 64);
+		}
+		pallen = (Pico.est.SonicPalCount+1)*0x40;
+	}
+	else if (Pico.video.reg[0xC] & 8) { // shadow/hilight mode
+		bgr444_to_rgb32(localPal, Pico.est.SonicPal, 64);
+		bgr444_to_rgb32_sh(localPal, Pico.est.SonicPal);
+		memcpy(localPal+0xc0, localPal, 0x40*4); // for spr prio mess
+	}
+	else {
+		bgr444_to_rgb32(localPal, Pico.est.SonicPal, 64);
+		memcpy(localPal+0x40, localPal, 0x40*4); // for spr prio mess
+		memcpy(localPal+0x80, localPal, 0x80*4); // for spr prio mess
+	}
+	localPal[0xc0] = 0x0000c000;
+	localPal[0xd0] = 0x00c00000;
+	localPal[0xe0] = 0x00000000; // reserved pixels for OSD
+	localPal[0xf0] = 0x00ffffff;
+
+	if (Pico.m.dirtyPal == 2)
+		Pico.m.dirtyPal = 0;
+	return pallen;
+}
+
+static int make_local_pal_sms(int fast_mode)
+{
+	static u16 tmspal[32] = {
+		// SMS palette for TMS modes
+		0x0000, 0x0000, 0x00a0, 0x00f0, 0x0500, 0x0f00, 0x0005, 0x0ff0,
+		0x000a, 0x000f, 0x0055, 0x00ff, 0x0050, 0x0f0f, 0x0555, 0x0fff,
+		// TMS palette
+		0x0000, 0x0000, 0x04c2, 0x07d6, 0x0e55, 0x0f77, 0x055c, 0x0ee4,
+		0x055f, 0x077f, 0x05bc, 0x08ce, 0x03a2, 0x0b5c, 0x0ccc, 0x0fff,
+	};
+	int i;
+	
+	if (!(Pico.video.reg[0] & 0x4)) {
+		for (i = Pico.est.SonicPalCount; i >= 0; i--) {
+			int sg = !!(PicoIn.AHW & (PAHW_SG|PAHW_SC));
+			bgr444_to_rgb32(localPal+i*0x40, tmspal+sg*0x10, 32);
+			memcpy(localPal+i*0x40+0x20, localPal+i*0x40, 0x20*4);
+		}
+	} else if (fast_mode) {
+		for (i = 0;i >= 0; i--) {
+			bgr444_to_rgb32(localPal+i*0x40, PicoMem.cram+i*0x40, 32);
+			memcpy(localPal+i*0x40+0x20, localPal+i*0x40, 0x20*4);
+		}
+	} else {
+		for (i = Pico.est.SonicPalCount; i >= 0; i--) {
+			bgr444_to_rgb32(localPal+i*0x40, Pico.est.SonicPal+i*0x40, 32);
+			memcpy(localPal+i*0x40+0x20, localPal+i*0x40, 0x20*4);
+		}
+	}
+	if (Pico.m.dirtyPal == 2)
+		Pico.m.dirtyPal = 0;
+	return (Pico.est.SonicPalCount+1)*0x40;
+}
+
+void pemu_finalize_frame(const char *fps, const char *notice)
 {
 	int emu_opt = currentConfig.EmuOpt;
+	int direct_rendered = 1;
 
-	if (PicoOpt & POPT_ALT_RENDERER)
+	if (is_16bit_mode())
+		localPalSize = 0; // 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);
-			// feed new palette to our device
-			gp2x_video_setpalette(localPal, 0x40);
-		}
+		if (Pico.m.dirtyPal)
+			localPalSize = make_local_pal(1);
 		// a hack for VR
-		if (PicoRead16Hook == PicoSVPRead16)
-			memset32((int *)(PicoDraw2FB+328*8+328*223), 0xe0e0e0e0, 328);
+		if (PicoIn.AHW & PAHW_SVP)
+			memset32((int *)(Pico.est.Draw2FB+328*8+328*223), 0xe0e0e0e0, 328/4);
 		// do actual copy
-		vidcpyM2(g_screen_ptr, PicoDraw2FB+328*8,
-			!(Pico.video.reg[12] & 1), !(PicoOpt & POPT_DIS_32C_BORDER));
+		vidcpy8bit(g_screen_ptr, Pico.est.Draw2FB,
+			(firstcol << 16) | firstline, (colcount << 16) | linecount);
+		direct_rendered = 0;
 	}
-	else if (!(emu_opt & EOPT_16BPP))
+	else if (get_renderer() == RT_8BIT_ACC)
 	{
 		// 8bit accurate renderer
 		if (Pico.m.dirtyPal)
-		{
-			int pallen = 0xc0;
-			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);
-				memcpy32(localPal+0xc0, localPal+0x40, 0x40);
-				pallen = 0x100;
-			}
-			else if (rendstatus & PDRAW_SONIC_MODE) { // mid-frame palette changes
-				vidConvCpyRGB32(localPal, Pico.cram, 0x40);
-				vidConvCpyRGB32(localPal+0x40, HighPal, 0x40);
-				vidConvCpyRGB32(localPal+0x80, HighPal+0x40, 0x40);
-			}
-			else {
-				vidConvCpyRGB32(localPal, Pico.cram, 0x40);
-				memcpy32(localPal+0x80, localPal, 0x40); // for spr prio mess
-			}
-			if (pallen > 0xc0) {
-				localPal[0xc0] = 0x0000c000;
-				localPal[0xd0] = 0x00c00000;
-				localPal[0xe0] = 0x00000000; // reserved pixels for OSD
-				localPal[0xf0] = 0x00ffffff;
-			}
-			gp2x_video_setpalette(localPal, pallen);
-		}
+			localPalSize = make_local_pal(0);
 	}
 
-	if (notice || (emu_opt & 2)) {
-		int h = 232;
-		if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(Pico.video.reg[1]&8))
-			h -= 8;
-		if (notice)
-			osd_text(4, h, notice);
-		if (emu_opt & 2)
-			osd_text(osd_fps_x, h, fps);
-	}
-	if ((emu_opt & 0x400) && (PicoAHW & PAHW_MCD))
+	// blank 1st column, only needed in modes directly rendering to screen
+	if (is_1stblanked && direct_rendered)
+		clear_1st_column(firstcol, firstline, linecount);
+
+	if (notice)
+		osd_text(4, osd_y, notice);
+	if (emu_opt & EOPT_SHOW_FPS)
+		osd_text(osd_fps_x, osd_y, fps);
+	if ((PicoIn.AHW & PAHW_MCD) && (emu_opt & EOPT_EN_CD_LEDS))
 		draw_cd_leds();
-	if (PicoAHW & PAHW_PICO)
-		draw_pico_ptr();
+	if (PicoIn.AHW & PAHW_PICO) {
+		int h = linecount, w = colcount;
+		u16 *pd = g_screen_ptr + firstline*g_screen_ppitch + firstcol;
+
+		if (pico_inp_mode && is_16bit_mode())
+			emu_pico_overlay(pd, w, h, g_screen_ppitch);
+		if (pico_inp_mode /*== 2 || overlay*/)
+			draw_pico_ptr();
+	}
+}
 
+void plat_video_flip(void)
+{
+	int stride = g_screen_width;
 	gp2x_video_flip();
+	// switching the palette takes immediate effect, whilst flipping only
+	// takes effect with the next vsync; unavoidable flicker may occur!
+	if (localPalSize)
+		gp2x_video_setpalette(localPal, localPalSize);
+
+	if (is_16bit_mode())
+		stride *= 2;
+	// the fast renderer has overlap areas and can't directly render to
+	// screen buffers. Its output is copied to screen in finalize_frame
+	if (get_renderer() != RT_8BIT_FAST || (PicoIn.AHW & PAHW_32X))
+		PicoDrawSetOutBuf(g_screen_ptr, stride);
 }
 
 /* XXX */
-#ifdef __GP2X__
 unsigned int plat_get_ticks_ms(void)
 {
 	return gp2x_get_ticks_ms();
@@ -350,7 +478,6 @@ unsigned int plat_get_ticks_us(void)
 {
 	return gp2x_get_ticks_us();
 }
-#endif
 
 void plat_wait_till_us(unsigned int us_to)
 {
@@ -373,36 +500,38 @@ void plat_video_wait_vsync(void)
 
 void plat_status_msg_clear(void)
 {
-	int is_8bit = (PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP);
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-		/* ugh.. */
-		int i, u, *p;
-		if (is_8bit) {
-			for (i = 0; i < 4; i++) {
+	int i, is_8bit = !is_16bit_mode();
+
+	for (i = 0; i < 4; i++) {
+		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
+			/* ugh.. */
+			int u, *p;
+			if (is_8bit) {
 				p = (int *)gp2x_screens[i] + (240-8) / 4;
 				for (u = 320; u > 0; u--, p += 240/4)
 					p[0] = p[1] = 0xe0e0e0e0;
-			}
-		} else {
-			for (i = 0; i < 4; i++) {
+			} else {
 				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;
 			}
+		} else {
+			if (is_8bit) {
+				char *d = (char *)gp2x_screens[i] + 320 * (240-8);
+				memset32((int *)d, 0xe0e0e0e0, 320 * 8 / 4);
+			} else {
+				char *d = (char *)gp2x_screens[i] + 320*2 * (240-8);
+				memset32((int *)d, 0, 2*320 * 8 / 4);
+			}
 		}
-		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);
 }
 
 void plat_status_msg_busy_next(const char *msg)
 {
 	plat_status_msg_clear();
-	pemu_update_display("", msg);
+	pemu_finalize_frame("", msg);
+	plat_video_flip();
 	emu_status_msg("");
 
 	/* assumption: msg_busy_next gets called only when
@@ -412,100 +541,170 @@ void plat_status_msg_busy_next(const char *msg)
 
 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);
 }
 
-static void vidResetMode(void)
-{
-	PicoScanEnd = NULL;
+static void vid_reset_mode(void)
+{
+	int gp2x_mode = 16;
+	int renderer = get_renderer();
+
+	PicoIn.opt &= ~(POPT_ALT_RENDERER|POPT_DIS_32C_BORDER|POPT_EN_SOFTSCALE);
+	if (currentConfig.scaling == EOPT_SCALE_SW) {
+		PicoIn.opt |= POPT_EN_SOFTSCALE;
+		PicoIn.filter = EOPT_FILTER_BILINEAR2;
+	} else if (currentConfig.scaling == EOPT_SCALE_HW)
+		// hw scaling, render without any padding
+		PicoIn.opt |= POPT_DIS_32C_BORDER;
+
+	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:
+		PicoIn.opt |= POPT_ALT_RENDERER;
+		PicoDrawSetOutFormat(PDF_NONE, 0);
+		vidcpy8bit = vidcpy_8bit;
+		gp2x_mode = 8;
+		break;
+	default:
+		printf("bad renderer\n");
+		break;
+	}
 
-	if (PicoOpt & POPT_ALT_RENDERER) {
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-			gp2x_video_changemode(-8);
-			vidcpyM2 = vidcpy_m2_rot;
-			osd_text = osd_text8_rot;
-		} else {
-			gp2x_video_changemode(8);
-			vidcpyM2 = vidcpy_m2;
-			osd_text = osd_text8;
+	if (PicoIn.AHW & 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);
 		}
+		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
+		gp2x_mode = 16;
 	}
-	else if (currentConfig.EmuOpt & EOPT_16BPP) {
-		PicoDrawSetColorFormat(1);
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-			gp2x_video_changemode(-16);
-			PicoScanBegin = EmuScanBegin16_rot;
-			PicoScanEnd = EmuScanEnd16_rot;
-			osd_text = osd_text16_rot;
-		} else {
-			gp2x_video_changemode(16);
-			PicoScanBegin = EmuScanBegin16;
-			osd_text = osd_text16;
+
+	emu_scan_begin = NULL;
+	emu_scan_end = NULL;
+
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
+		if ((PicoIn.AHW & PAHW_32X) || renderer == RT_16BIT) {
+			emu_scan_begin = EmuScanBegin16_rot;
+			emu_scan_end = EmuScanEnd16_rot;
+			memset(rot_buff, 0, 320*4*2);
 		}
-	}
-	else {
-		PicoDrawSetColorFormat(2);
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-			gp2x_video_changemode(-8);
-			PicoScanBegin = EmuScanBegin8_rot;
-			PicoScanEnd = EmuScanEnd8_rot;
-			osd_text = osd_text8_rot;
-		} else {
-			gp2x_video_changemode(8);
-			PicoScanBegin = EmuScanBegin8;
-			osd_text = osd_text8;
+		else if (renderer == RT_8BIT_ACC) {
+			emu_scan_begin = EmuScanBegin8_rot;
+			emu_scan_end = EmuScanEnd8_rot;
+			memset(rot_buff, 0xe0, 320*4);
 		}
+		else if (renderer == RT_8BIT_FAST)
+			vidcpy8bit = vidcpy_8bit_rot;
 	}
 
-	if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP)) {
+	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;
+
+	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);
-		gp2x_video_flip();
 	}
+
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
+		gp2x_mode = -gp2x_mode;
+
+	gp2x_video_changemode(gp2x_mode, Pico.m.pal);
+
+	// 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);
+
 	Pico.m.dirtyPal = 1;
 
-	// reset scaling
-	if (currentConfig.scaling == EOPT_SCALE_HW_HV && !(Pico.video.reg[1]&8))
-	     gp2x_video_RGB_setscaling(8, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 224);
-	else gp2x_video_RGB_setscaling(0, (PicoOpt&0x100)&&!(Pico.video.reg[12]&1) ? 256 : 320, 240);
+	// palette converters for 8bit modes
+	make_local_pal = (PicoIn.AHW & PAHW_SMS) ? make_local_pal_sms : make_local_pal_md;
 }
 
-void plat_video_toggle_renderer(int is_next, int is_menu)
+void emu_video_mode_change(int start_line, int line_count, int start_col, int col_count)
 {
-	/* alt, 16bpp, 8bpp */
-	if (PicoOpt & POPT_ALT_RENDERER) {
-		PicoOpt &= ~POPT_ALT_RENDERER;
-		if (is_next)
-			currentConfig.EmuOpt |= EOPT_16BPP;
-	} else if (!(currentConfig.EmuOpt & EOPT_16BPP)) {
-		if (is_next)
-			PicoOpt |= POPT_ALT_RENDERER;
-		else
-			currentConfig.EmuOpt |= EOPT_16BPP;
-	} else {
-		currentConfig.EmuOpt &= ~EOPT_16BPP;
-		if (!is_next)
-			PicoOpt |= POPT_ALT_RENDERER;
+	int scalex = 320, scaley = 240;
+	int ln_offs = 0;
+
+	if (currentConfig.vscaling != EOPT_SCALE_NONE &&
+			(is_16bit_mode() || get_renderer() != RT_8BIT_FAST)) {
+		/* NTSC always has 224 visible lines, anything smaller has bars */
+		if (line_count < 224 && line_count > 144) {
+			start_line -= (224-line_count) /2;
+			line_count = 224;
+		}
+
+		/* line doubling for swscaling, also needed for bg frames */
+		if (currentConfig.vscaling == EOPT_SCALE_SW && line_count < 240) {
+			ld_lines = ld_left = 2*line_count / (240 - line_count);
+			PicoDrawSetCallbacks(EmuScanBegin16_ld,EmuScanEnd16_ld);
+		}
 	}
 
-	if (is_menu)
+	/* blanking for SMS with 1st tile blanked */
+	is_1stblanked = (col_count == 248);
+	firstline = start_line; linecount = line_count;
+	firstcol = start_col; colcount = col_count;
+
+	if (doing_bg_frame)
 		return;
 
-	vidResetMode();
+	osd_fps_x = OSD_FPS_X;
+	osd_y = 232;
 
-	if (PicoOpt & POPT_ALT_RENDERER) {
-		emu_status_msg(" 8bit fast renderer");
-	} else if (currentConfig.EmuOpt & EOPT_16BPP) {
-		emu_status_msg("16bit accurate renderer");
-	} else {
-		emu_status_msg(" 8bit accurate renderer");
+	/* set up hwscaling here */
+	if (col_count < 320 && currentConfig.scaling == EOPT_SCALE_HW) {
+		scalex = col_count;
+		osd_fps_x = col_count - (320-OSD_FPS_X);
 	}
+
+	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);
+
+	// 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 plat_video_toggle_renderer(int change, int is_menu_call)
+{
+	change_renderer(change);
+
+	if (is_menu_call)
+		return;
+
+	vid_reset_mode();
+	rendstatus_old = -1;
+
+	if (PicoIn.AHW & PAHW_32X)
+		emu_status_msg(renderer_names32x[get_renderer()]);
+	else
+		emu_status_msg(renderer_names[get_renderer()]);
 }
 
 #if 0 // TODO
@@ -521,7 +720,7 @@ static void RunEventsPico(unsigned int events)
 		if (ret > 35000)
 		{
 			if (pdown_frames++ > 5)
-				PicoPad[0] |= 0x20;
+				PicoIn.pad[0] |= 0x20;
 
 			pico_pen_x = px;
 			pico_pen_y = py;
@@ -544,12 +743,12 @@ static void RunEventsPico(unsigned int events)
 void plat_update_volume(int has_changed, int is_up)
 {
 	static int prev_frame = 0, wait_frames = 0;
-	int vol = currentConfig.volume;
 	int need_low_volume = 0;
+	int vol = currentConfig.volume;
 	gp2x_soc_t soc;
 
 	soc = soc_detect();
-	if ((PicoOpt & POPT_EN_STEREO) && soc == SOCID_MMSP2)
+	if ((PicoIn.opt & POPT_EN_STEREO) && soc == SOCID_MMSP2)
 		need_low_volume = 1;
 
 	if (has_changed)
@@ -557,14 +756,9 @@ void plat_update_volume(int has_changed, int is_up)
 		if (need_low_volume && vol < 5 && prev_frame == Pico.m.frame_count - 1 && wait_frames < 12)
 			wait_frames++;
 		else {
-			if (is_up) {
-				if (vol < 99) vol++;
-			} else {
-				if (vol >  0) vol--;
-			}
 			wait_frames = 0;
-			sndout_oss_setvol(vol, vol);
-			currentConfig.volume = vol;
+			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;
@@ -575,284 +769,103 @@ void plat_update_volume(int has_changed, int is_up)
 
 	/* set the right mixer func */
 	if (vol >= 5)
-		PsndMix_32_to_16l = mix_32_to_16l_stereo;
+		PsndMix_32_to_16 = mix_32_to_16_stereo;
 	else {
-		mix_32_to_16l_level = 5 - vol;
-		PsndMix_32_to_16l = mix_32_to_16l_stereo_lvl;
+		mix_32_to_16_level = 5 - vol;
+		PsndMix_32_to_16 = mix_32_to_16_stereo_lvl;
 	}
 }
 
-static void updateSound(int len)
-{
-	len <<= 1;
-	if (PicoOpt & POPT_EN_STEREO)
-		len <<= 1;
-
-	if ((currentConfig.EmuOpt & EOPT_NO_FRMLIMIT) && !sndout_oss_can_write(len))
-		return;
-
-	/* avoid writing audio when lagging behind to prevent audio lag */
-	if (PicoSkipFrame != 2)
-		sndout_oss_write(PsndOut, len);
-}
-
 void pemu_sound_start(void)
 {
-	static int PsndRate_old = 0, PicoOpt_old = 0, pal_old = 0;
+	gp2x_soc_t soc;
 
-	PsndOut = NULL;
+	emu_sound_start();
 
-	// prepare sound stuff
 	if (currentConfig.EmuOpt & EOPT_EN_SOUND)
 	{
-		int is_stereo = (PicoOpt & POPT_EN_STEREO) ? 1 : 0;
-		int target_fps = Pico.m.pal ? 50 : 60;
-		int frame_samples, snd_excess_add;
-		int snd_rate_oss = PsndRate;
-		gp2x_soc_t soc;
-
 		soc = soc_detect();
 		if (soc == SOCID_POLLUX) {
-			/* POLLUX pain: DPLL1 / mclk_div / bitclk_div / 4 */
-			switch (PsndRate) {
-			case 44100: PsndRate = 44171; break; // 44170.673077
-			case 22050: PsndRate = 22086; break; // 22085.336538
-			case 11025: PsndRate = 11043; break; // 11042.668269
-			default: break;
-			}
-		}
-
-		#define SOUND_RERATE_FLAGS (POPT_EN_FM|POPT_EN_PSG|POPT_EN_STEREO|POPT_EXT_FM|POPT_EN_MCD_CDDA)
-		if (PsndRate != PsndRate_old || Pico.m.pal != pal_old || ((PicoOpt & POPT_EXT_FM) && crashed_940) ||
-				((PicoOpt ^ PicoOpt_old) & SOUND_RERATE_FLAGS)) {
+			PicoIn.sndRate = pollux_get_real_snd_rate(PicoIn.sndRate);
 			PsndRerate(Pico.m.frame_count ? 1 : 0);
 		}
 
-		memset(sndBuffer, 0, sizeof(sndBuffer));
-		PsndOut = sndBuffer;
-		PicoWriteSound = updateSound;
-		PsndRate_old = PsndRate;
-		PicoOpt_old  = PicoOpt;
-		pal_old = Pico.m.pal;
-		plat_update_volume(0, 0);
-
-		frame_samples = PsndLen;
-		snd_excess_add = ((PsndRate - PsndLen * target_fps)<<16) / target_fps;
-		if (snd_excess_add != 0)
-			frame_samples++;
-		if (soc == SOCID_POLLUX)
-			frame_samples *= 2;	/* force larger buffer */
-
-		printf("starting audio: %i len: %i (ex: %04x) stereo: %i, pal: %i\n",
-			PsndRate, PsndLen, snd_excess_add, is_stereo, Pico.m.pal);
-		sndout_oss_setvol(currentConfig.volume, currentConfig.volume);
-		sndout_oss_start(snd_rate_oss, frame_samples, is_stereo);
-
-		/* Wiz's sound hardware needs more prebuffer */
-		if (soc == SOCID_POLLUX)
-			updateSound(frame_samples);
+		plat_target_step_volume(&currentConfig.volume, 0);
 	}
 }
 
+static const int sound_rates[] = { 52000, 44100, 32000, 22050, 16000, 11025, 8000 };
+
 void pemu_sound_stop(void)
 {
-	/* get back from Wiz pain */
-	switch (PsndRate) {
-		case 44171: PsndRate = 44100; break;
-		case 22086: PsndRate = 22050; break;
-		case 11043: PsndRate = 11025; break;
-		default: break;
-	}
-}
+	int i;
 
-void pemu_sound_wait(void)
-{
-	// don't need to do anything, writes will block by themselves
+	/* get back from Pollux pain */
+	PicoIn.sndRate += 1000;
+	for (i = 0; i < ARRAY_SIZE(sound_rates); i++) {
+		if (PicoIn.sndRate >= sound_rates[i]) {
+			PicoIn.sndRate = sound_rates[i];
+			break;
+		}
+	}
 }
 
-
-void pemu_forced_frame(int opts)
+void pemu_forced_frame(int no_scale, int do_emu)
 {
-	int po_old = PicoOpt;
-	int eo_old = currentConfig.EmuOpt;
+	doing_bg_frame = 1;
+	PicoDrawSetCallbacks(NULL, NULL);
+	Pico.m.dirtyPal = 1;
+	PicoIn.opt &= ~POPT_DIS_32C_BORDER;
+	gp2x_current_bpp = 16;
+	// always render in screen 3 since menu uses 0-2
+	g_screen_ptr = gp2x_screens[3];
 
-	PicoOpt &= ~POPT_ALT_RENDERER;
-	PicoOpt |= opts|POPT_ACC_SPRITES;
-	currentConfig.EmuOpt |= EOPT_16BPP;
+	if (!no_scale)
+		no_scale = currentConfig.scaling == EOPT_SCALE_NONE;
+	emu_cmn_forced_frame(no_scale, do_emu, g_screen_ptr);
 
-	PicoDrawSetColorFormat(1);
-	PicoScanBegin = EmuScanBegin16;
-	PicoScanEnd = NULL;
-	Pico.m.dirtyPal = 1;
-	PicoFrameDrawOnly();
+	if (is_1stblanked)
+		clear_1st_column(firstcol, firstline, linecount);
 
-	PicoOpt = po_old;
-	currentConfig.EmuOpt = eo_old;
+	g_menubg_src_ptr = g_screen_ptr;
+	doing_bg_frame = 0;
 }
 
 void plat_debug_cat(char *str)
 {
 }
 
-void pemu_video_mode_change(int is_32col, int is_240_lines)
+void plat_video_loop_prepare(void) 
 {
-	int scalex = 320;
-	osd_fps_x = OSD_FPS_X;
-	if (is_32col && (PicoOpt & POPT_DIS_32C_BORDER)) {
-		scalex = 256;
-		osd_fps_x = OSD_FPS_X - 64;
-	}
-	/* want vertical scaling and game is not in 240 line mode */
-	if (currentConfig.scaling == EOPT_SCALE_HW_HV && !is_240_lines)
-		gp2x_video_RGB_setscaling(8, scalex, 224);
-	else
-		gp2x_video_RGB_setscaling(0, scalex, 240);
-
-	// clear whole screen in all buffers
-	if ((PicoOpt & POPT_ALT_RENDERER) || !(currentConfig.EmuOpt & EOPT_16BPP))
-		gp2x_memset_all_buffers(0, 0xe0, 320*240);
-	else
-		gp2x_memset_all_buffers(0, 0, 320*240*2);
-}
-
-#if 0
-static void tga_dump(void)
-{
-#define BYTE unsigned char
-#define WORD unsigned short
-	struct
-	{
-		BYTE IDLength;        /* 00h  Size of Image ID field */
-		BYTE ColorMapType;    /* 01h  Color map type */
-		BYTE ImageType;       /* 02h  Image type code */
-		WORD CMapStart;       /* 03h  Color map origin */
-		WORD CMapLength;      /* 05h  Color map length */
-		BYTE CMapDepth;       /* 07h  Depth of color map entries */
-		WORD XOffset;         /* 08h  X origin of image */
-		WORD YOffset;         /* 0Ah  Y origin of image */
-		WORD Width;           /* 0Ch  Width of image */
-		WORD Height;          /* 0Eh  Height of image */
-		BYTE PixelDepth;      /* 10h  Image pixel size */
-		BYTE ImageDescriptor; /* 11h  Image descriptor byte */
-	} __attribute__((packed)) TGAHEAD;
-	static unsigned short oldscr[320*240];
-	FILE *f; char name[128]; int i;
-
-	memset(&TGAHEAD, 0, sizeof(TGAHEAD));
-	TGAHEAD.ImageType = 2;
-	TGAHEAD.Width = 320;
-	TGAHEAD.Height = 240;
-	TGAHEAD.PixelDepth = 16;
-	TGAHEAD.ImageDescriptor = 2<<4; // image starts at top-left
-
-#define CONV(X) (((X>>1)&0x7fe0)|(X&0x1f)) // 555?
-
-	for (i = 0; i < 320*240; i++)
-		if(oldscr[i] != CONV(((unsigned short *)g_screen_ptr)[i])) break;
-	if (i < 320*240)
-	{
-		for (i = 0; i < 320*240; i++)
-			oldscr[i] = CONV(((unsigned short *)g_screen_ptr)[i]);
-		sprintf(name, "%05i.tga", Pico.m.frame_count);
-		f = fopen(name, "wb");
-		if (!f) { printf("!f\n"); exit(1); }
-		fwrite(&TGAHEAD, 1, sizeof(TGAHEAD), f);
-		fwrite(oldscr, 1, 320*240*2, f);
-		fclose(f);
-	}
+	// make sure we are in correct mode
+	change_renderer(0);
+	vid_reset_mode();
+	rendstatus_old = -1;
 }
-#endif
 
 void pemu_loop_prep(void)
 {
-	static int gp2x_old_clock = -1, EmuOpt_old = 0, pal_old = 0;
-	static int gp2x_old_gamma = 100;
-	gp2x_soc_t soc;
-
-	soc = soc_detect();
-
-	if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_RAM_TIMINGS) {
-		if (currentConfig.EmuOpt & EOPT_RAM_TIMINGS)
-			set_ram_timings();
-		else
-			unset_ram_timings();
-	}
-
-	if (gp2x_old_clock < 0)
-		gp2x_old_clock = default_cpu_clock;
-	if (gp2x_old_clock != currentConfig.CPUclock) {
-		printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);
-		gp2x_set_cpuclk(currentConfig.CPUclock);
-		gp2x_old_clock = currentConfig.CPUclock;
-		printf(" done\n");
-	}
+	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);
 
-	if (gp2x_old_gamma != currentConfig.gamma || ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_A_SN_GAMMA)) {
-		set_lcd_gamma(currentConfig.gamma, !!(currentConfig.EmuOpt & EOPT_A_SN_GAMMA));
-		gp2x_old_gamma = currentConfig.gamma;
-		printf("updated gamma to %i, A_SN's curve: %i\n", currentConfig.gamma, !!(currentConfig.EmuOpt&0x1000));
-	}
-
-	if (((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_VSYNC) || Pico.m.pal != pal_old) {
-		if ((currentConfig.EmuOpt & EOPT_VSYNC) || soc == SOCID_POLLUX)
-			set_lcd_custom_rate(Pico.m.pal);
-		else if (EmuOpt_old & EOPT_VSYNC)
-			unset_lcd_custom_rate();
-	}
-
-	if ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_MMUHACK)
-		gp2x_make_fb_bufferable(currentConfig.EmuOpt & EOPT_MMUHACK);
-
-	EmuOpt_old = currentConfig.EmuOpt;
-	pal_old = Pico.m.pal;
-
-	// make sure we are in correct mode
-	vidResetMode();
-	scaling_update();
-
-	pemu_sound_start();
+	// dirty buffers better go now than during gameplay
+	sync();
+	sleep(0);
 }
 
 void pemu_loop_end(void)
 {
-	int po_old = PicoOpt;
-	int eo_old = currentConfig.EmuOpt;
-
 	pemu_sound_stop();
 
+	if (g_screen_ptr == gp2x_screens[0]) {
+		/* currently on screen 3, which is needed for forced_frame */
+		int size = gp2x_current_bpp / 8;
+		gp2x_memcpy_all_buffers(g_screen_ptr, 0, 320*240 * size);
+		gp2x_video_flip();
+	}
 	/* do one more frame for menu bg */
-	PicoOpt &= ~POPT_ALT_RENDERER;
-	PicoOpt |= POPT_EN_SOFTSCALE|POPT_ACC_SPRITES;
-	currentConfig.EmuOpt |= EOPT_16BPP;
-
-	PicoScanBegin = EmuScanBegin16;
-	PicoScanEnd = NULL;
-	PicoDrawSetColorFormat(1);
-	Pico.m.dirtyPal = 1;
-	PicoFrame();
-
-	PicoOpt = po_old;
-	currentConfig.EmuOpt = eo_old;
-}
-
-const char *plat_get_credits(void)
-{
-	return "PicoDrive v" VERSION " (c) notaz, 2006-2009\n\n\n"
-		"Credits:\n"
-		"fDave: Cyclone 68000 core,\n"
-		"      base code of PicoDrive\n"
-		"Reesy & FluBBa: DrZ80 core\n"
-		"MAME devs: YM2612 and SN76496 cores\n"
-		"rlyeh and others: minimal SDK\n"
-		"Squidge: mmuhack\n"
-		"Dzz: ARM940 sample\n"
-		"GnoStiC / Puck2099: USB joy code\n"
-		"craigix: GP2X hardware\n"
-		"ketchupgun: skin design\n"
-		"\n"
-		"special thanks (for docs, ideas):\n"
-		" Charles MacDonald, Haze,\n"
-		" Stephane Dallongeville,\n"
-		" Lordus, Exophase, Rokas,\n"
-		" Nemesis, Tasco Deluxe";
+	pemu_forced_frame(0, 1);
 }
+