X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=gp2x%2Femu.c;h=df9faac8d6fc8bb5f20e08e5b53c5620e256aaf2;hb=ca69c3e5a0ecf407c02dc85c6f3282ebb1efc5a2;hp=ccb5e87d5aa2ab36bdf9730c87e6284ac53b125d;hpb=9cfdd2d2e94daaeb85ab7f1675312dec80659ec3;p=libpicofe.git

diff --git a/gp2x/emu.c b/gp2x/emu.c
index ccb5e87..df9faac 100644
--- a/gp2x/emu.c
+++ b/gp2x/emu.c
@@ -13,15 +13,18 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
 
 #include "plat_gp2x.h"
 #include "soc.h"
+#include "soc_pollux.h"
 #include "../common/plat.h"
 #include "../common/menu.h"
 #include "../common/arm_utils.h"
 #include "../common/fonts.h"
 #include "../common/emu.h"
 #include "../common/config.h"
+#include "../common/input.h"
 #include "../linux/sndout_oss.h"
 #include "version.h"
 
@@ -42,30 +45,15 @@ 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, osd_y;
-const char *renderer_names_[] = { "16bit accurate", " 8bit accurate", "     8bit fast", NULL };
-const char *renderer_names32x_[] = { "accurate", "faster  ", "fastest ", NULL };
-const char **renderer_names = renderer_names_;
-const char **renderer_names32x = renderer_names32x_;
+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 };
 
-extern void *gp2x_screens[4];
-
+static int (*emu_scan_begin)(unsigned int num) = NULL;
+static int (*emu_scan_end)(unsigned int num) = NULL;
 
-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;
-	}
-}
+extern void *gp2x_screens[4];
 
 
 void pemu_prep_defconfig(void)
@@ -74,22 +62,22 @@ void pemu_prep_defconfig(void)
 
 	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)
+	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)
 {
-	gp2x_soc_t soc;
-
-	soc = soc_detect();
-	if (soc != SOCID_MMSP2)
+	if (gp2x_dev_id != GP2X_DEV_GP2X)
 		PicoOpt &= ~POPT_EXT_FM;
-	if (soc != SOCID_POLLUX)
+	if (gp2x_dev_id != GP2X_DEV_WIZ)
 		currentConfig.EmuOpt &= ~EOPT_WIZ_TEAR_FIX;
 
 	if (currentConfig.gamma < 10 || currentConfig.gamma > 300)
@@ -115,6 +103,11 @@ static void change_renderer(int diff)
 	else
 		r = &currentConfig.renderer;
 	*r += diff;
+
+	// 8bpp fast is not there (yet?)
+	if ((PicoAHW & PAHW_SMS) && *r == RT_8BIT_FAST)
+		(*r)++;
+
 	if      (*r >= RT_COUNT)
 		*r = 0;
 	else if (*r < 0)
@@ -278,6 +271,46 @@ static int EmuScanEnd8_rot(unsigned int num)
 	return 0;
 }
 
+/* line doublers */
+static unsigned int ld_counter;
+static int ld_left, ld_lines;
+
+static int EmuScanBegin16_ld(unsigned int num)
+{
+	if ((signed int)(ld_counter - num) > 100)
+		ld_counter = 0;
+
+	if (emu_scan_begin)
+		return emu_scan_begin(ld_counter);
+	else
+		DrawLineDest = (char *)g_screen_ptr + 320 * ld_counter * gp2x_current_bpp / 8;
+
+	return 0;
+}
+
+static int EmuScanEnd16_ld(unsigned int num)
+{
+	void *oldline = DrawLineDest;
+
+	if (emu_scan_end)
+		emu_scan_end(ld_counter);
+
+	ld_counter++;
+	ld_left--;
+	if (ld_left <= 0) {
+		ld_left = ld_lines;
+
+		EmuScanBegin16_ld(num);
+		memcpy32(DrawLineDest, oldline, 320 * gp2x_current_bpp / 8 / 4);
+		if (emu_scan_end)
+			emu_scan_end(ld_counter);
+
+		ld_counter++;
+	}
+
+	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);
@@ -359,12 +392,10 @@ void pemu_finalize_frame(const char *fps, const char *notice)
 		}
 	}
 
-	if (notice || (emu_opt & EOPT_SHOW_FPS)) {
-		if (notice)
-			osd_text(4, osd_y, notice);
-		if (emu_opt & 2)
-			osd_text(osd_fps_x, osd_y, 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)
@@ -459,79 +490,71 @@ void plat_status_msg_busy_first(const char *msg)
 	plat_status_msg_busy_next(msg);
 }
 
-static void vidResetMode(void)
+static void vid_reset_mode(void)
 {
 	int gp2x_mode = 16;
 	int renderer = get_renderer();
 
-	PicoScanBegin = NULL;
-	PicoScanEnd = NULL;
+	PicoOpt &= ~POPT_ALT_RENDERER;
+	emu_scan_begin = NULL;
+	emu_scan_end = NULL;
 
 	switch (renderer) {
 	case RT_16BIT:
-		PicoOpt &= ~POPT_ALT_RENDERER;
 		PicoDrawSetOutFormat(PDF_RGB555, 0);
 		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-			PicoScanBegin = EmuScanBegin16_rot;
-			PicoScanEnd = EmuScanEnd16_rot;
-		}
 		break;
 	case RT_8BIT_ACC:
-		PicoOpt &= ~POPT_ALT_RENDERER;
 		PicoDrawSetOutFormat(PDF_8BIT, 0);
 		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width);
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-			PicoScanBegin = EmuScanBegin8_rot;
-			PicoScanEnd = EmuScanEnd8_rot;
-		}
 		gp2x_mode = 8;
 		break;
 	case RT_8BIT_FAST:
-		PicoOpt |=  POPT_ALT_RENDERER;
+		PicoOpt |= POPT_ALT_RENDERER;
 		PicoDrawSetOutFormat(PDF_NONE, 0);
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
-			vidcpyM2 = vidcpy_m2_rot;
-		else
-			vidcpyM2 = vidcpy_m2;
+		vidcpyM2 = vidcpy_m2;
 		gp2x_mode = 8;
 		break;
+	default:
+		printf("bad renderer\n");
+		break;
 	}
 
-	if (is_16bit_mode())
-		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text16_rot : osd_text16;
-	else
-		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text8_rot : osd_text8;
-
 	if (PicoAHW & PAHW_32X) {
-		// rules change in 32X world
-		if (renderer != RT_16BIT) {
-			PicoDrawSetOutFormat(PDF_NONE, 0);
-			PicoScanBegin = NULL;
-			PicoScanEnd = NULL;
-		}
-		PicoScan32xBegin = NULL;
-		PicoScan32xEnd = NULL;
-		if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) {
-			PicoScan32xBegin = EmuScanBegin16_rot;
-			PicoScan32xEnd = EmuScanEnd16_rot;
-		}
 		// 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);
 			PicoDraw32xSetFrameMode(0, 0);
 		}
 		else {
-			PicoDraw32xSetFrameMode(1, (renderer == RT_16BIT) ? 1 : 0);
+			PicoDrawSetOutFormat(PDF_NONE, 0);
+			PicoDraw32xSetFrameMode(1, 0);
 		}
 		PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 		gp2x_mode = 16;
 	}
 
-	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
-		gp2x_mode = -gp2x_mode;
-	gp2x_video_changemode(gp2x_mode);
+	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 : 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
@@ -540,19 +563,65 @@ static void vidResetMode(void)
 		localPal[0xf0] = 0x00ffffff;
 		gp2x_video_setpalette(localPal, 0x100);
 		gp2x_memset_all_buffers(0, 0xe0, 320*240);
-		gp2x_video_flip();
 	}
+	else
+		gp2x_memset_all_buffers(0, 0, 320*240*2);
+
+	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
+		gp2x_mode = -gp2x_mode;
+
+	gp2x_video_changemode(gp2x_mode);
+
 	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);
+	PicoOpt &= ~POPT_EN_SOFTSCALE;
+	if (currentConfig.scaling == EOPT_SCALE_SW)
+		PicoOpt |= POPT_EN_SOFTSCALE;
 
 	// palette converters for 8bit modes
 	make_local_pal = (PicoAHW & PAHW_SMS) ? make_local_pal_sms : make_local_pal_md;
 }
 
+void emu_video_mode_change(int start_line, int line_count, int is_32cols)
+{
+	int scalex = 320, scaley = 240;
+	int ln_offs = 0;
+
+	if (doing_bg_frame)
+		return;
+
+	osd_fps_x = OSD_FPS_X;
+	osd_y = 232;
+
+	/* 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;
+	}
+
+	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);
+
+	/* 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 plat_video_toggle_renderer(int change, int is_menu_call)
 {
 	change_renderer(change);
@@ -560,7 +629,7 @@ void plat_video_toggle_renderer(int change, int is_menu_call)
 	if (is_menu_call)
 		return;
 
-	vidResetMode();
+	vid_reset_mode();
 	rendstatus_old = -1;
 
 	if (PicoAHW & PAHW_32X)
@@ -643,18 +712,13 @@ void plat_update_volume(int has_changed, int is_up)
 	}
 }
 
-static void updateSound(int len)
+static void oss_write_nonblocking(int len)
 {
-	len <<= 1;
-	if (PicoOpt & POPT_EN_STEREO)
-		len <<= 1;
-
+	// sndout_oss_can_write() is not reliable, only use with no_frmlimit
 	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);
+	sndout_oss_write_nb(PsndOut, len);
 }
 
 void pemu_sound_start(void)
@@ -667,21 +731,22 @@ void pemu_sound_start(void)
 	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;
 
+		memset(sndBuffer, 0, sizeof(sndBuffer));
+		PsndOut = sndBuffer;
+		PicoWriteSound = oss_write_nonblocking;
+		plat_update_volume(0, 0);
+
+		printf("starting audio: %i len: %i stereo: %i, pal: %i\n",
+			PsndRate, PsndLen, is_stereo, Pico.m.pal);
+		sndout_oss_start(snd_rate_oss, is_stereo, 1);
+		sndout_oss_setvol(currentConfig.volume, currentConfig.volume);
+
 		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;
-			}
-		}
+		if (soc == SOCID_POLLUX)
+			PsndRate = pollux_get_real_snd_rate(PsndRate);
 
 		#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) ||
@@ -689,40 +754,25 @@ void pemu_sound_start(void)
 			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);
 	}
 }
 
+static const int sound_rates[] = { 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;
+
+	/* 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;
+		}
 	}
 }
 
@@ -731,53 +781,24 @@ void pemu_sound_wait(void)
 	// don't need to do anything, writes will block by themselves
 }
 
-
-void pemu_forced_frame(int opts)
+void pemu_forced_frame(int no_scale, int do_emu)
 {
-	int po_old = PicoOpt;
-
-	PicoOpt &= ~POPT_ALT_RENDERER;
-	PicoOpt |= opts|POPT_ACC_SPRITES;
-
-	PicoDrawSetOutFormat(PDF_RGB555, 1);
+	doing_bg_frame = 1;
 	PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 	PicoDraw32xSetFrameMode(0, 0);
-	PicoScanBegin = NULL;
-	PicoScanEnd = NULL;
+	PicoDrawSetCallbacks(NULL, NULL);
 	Pico.m.dirtyPal = 1;
-	PicoFrameDrawOnly();
 
-	PicoOpt = po_old;
+	emu_cmn_forced_frame(no_scale, do_emu);
+
+	g_menubg_src_ptr = g_screen_ptr;
+	doing_bg_frame = 0;
 }
 
 void plat_debug_cat(char *str)
 {
 }
 
-void emu_video_mode_change(int start_line, int line_count, int is_32cols)
-{
-	int scalex = 320;
-	osd_fps_x = OSD_FPS_X;
-	osd_y = 232;
-	if (is_32cols && (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) {
-		gp2x_video_RGB_setscaling(start_line, scalex, line_count);
-		osd_y = start_line + line_count - 8;
-	} else
-		gp2x_video_RGB_setscaling(0, scalex, 240);
-
-	// 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);
-}
-
 #if 0
 static void tga_dump(void)
 {
@@ -843,7 +864,7 @@ void pemu_loop_prep(void)
 
 	if (gp2x_old_clock < 0)
 		gp2x_old_clock = default_cpu_clock;
-	if (gp2x_old_clock != currentConfig.CPUclock) {
+	if (gp2x_old_clock != currentConfig.CPUclock && gp2x_set_cpuclk != NULL) {
 		printf("changing clock to %i...", currentConfig.CPUclock); fflush(stdout);
 		gp2x_set_cpuclk(currentConfig.CPUclock);
 		gp2x_old_clock = currentConfig.CPUclock;
@@ -863,6 +884,10 @@ void pemu_loop_prep(void)
 			unset_lcd_custom_rate();
 	}
 
+	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 ((EmuOpt_old ^ currentConfig.EmuOpt) & EOPT_MMUHACK)
 		gp2x_make_fb_bufferable(currentConfig.EmuOpt & EOPT_MMUHACK);
 
@@ -870,54 +895,21 @@ void pemu_loop_prep(void)
 	pal_old = Pico.m.pal;
 
 	// make sure we are in correct mode
-	vidResetMode();
-	scaling_update();
+	change_renderer(0);
+	vid_reset_mode();
+
+	// dirty buffers better go now than during gameplay
+	sync();
+	sleep(0);
 
 	pemu_sound_start();
 }
 
 void pemu_loop_end(void)
 {
-	int po_old = PicoOpt;
-	int eo_old = currentConfig.EmuOpt;
-
 	pemu_sound_stop();
-	memset32(g_screen_ptr, 0, 320*240*2/4);
 
 	/* do one more frame for menu bg */
-	PicoOpt &= ~POPT_ALT_RENDERER;
-	PicoOpt |= POPT_EN_SOFTSCALE|POPT_ACC_SPRITES;
-
-	PicoDrawSetOutFormat(PDF_RGB555, 1);
-	PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
-	PicoDraw32xSetFrameMode(0, 0);
-	PicoScanBegin = NULL;
-	PicoScanEnd = NULL;
-	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);
 }
+