From: notaz <notasas@gmail.com>
Date: Wed, 15 Sep 2010 13:48:55 +0000 (+0000)
Subject: supporting caanoo, line doublers, refactoring
X-Git-Tag: v1.85~164
X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4750ee051b509a17bb940d6372a0c12faae18cd;p=picodrive.git

supporting caanoo, line doublers, refactoring

git-svn-id: file:///home/notaz/opt/svn/PicoDrive@893 be3aeb3a-fb24-0410-a615-afba39da0efa
---

diff --git a/pico/draw.c b/pico/draw.c
index 3442d8f7..0dd682c4 100644
--- a/pico/draw.c
+++ b/pico/draw.c
@@ -1590,3 +1590,19 @@ void PicoDrawSetInternalBuf(void *dest, int increment)
   }
 }
 
+void PicoDrawSetCallbacks(int (*begin)(unsigned int num), int (*end)(unsigned int num))
+{
+  PicoScanBegin = NULL;
+  PicoScanEnd = NULL;
+  PicoScan32xBegin = NULL;
+  PicoScan32xEnd = NULL;
+
+  if ((PicoAHW & PAHW_32X) && FinalizeLine != FinalizeLine32xRGB555) {
+    PicoScan32xBegin = begin;
+    PicoScan32xEnd = end;
+  }
+  else {
+    PicoScanBegin = begin;
+    PicoScanEnd = end;
+  }
+}
diff --git a/pico/draw_arm.s b/pico/draw_arm.s
index 82bb603d..ae6de760 100644
--- a/pico/draw_arm.s
+++ b/pico/draw_arm.s
@@ -1638,7 +1638,7 @@ vidConvCpyRGB565: @ void *to, void *from, int pixels
     stmfd   sp!, {r4-r9,lr}
     mov     r8,     #0x0061
     orr     r8, r8, #0x0800
-    orr     r8, r8, lsl #16
+    orr     r8, r8, r8, lsl #16
     vidConvCpyRGB565_local
     ldmfd   sp!, {r4-r9,lr}
     bx      lr
@@ -1663,7 +1663,7 @@ PicoDoHighPal555_nopush:
     mov     r2, #0x40
     mov     r8,     #0x0061
     orr     r8, r8, #0x0800
-    orr     r8, r8, lsl #16
+    orr     r8, r8, r8, lsl #16
 
     vidConvCpyRGB565_local
 
diff --git a/pico/pico.h b/pico/pico.h
index b8f1c3f8..e0acda10 100644
--- a/pico/pico.h
+++ b/pico/pico.h
@@ -170,10 +170,9 @@ typedef enum
 } pdso_t;
 void PicoDrawSetOutFormat(pdso_t which, int allow_32x);
 void PicoDrawSetOutBuf(void *dest, int increment);
+void PicoDrawSetCallbacks(int (*begin)(unsigned int num), int (*end)(unsigned int num));
 extern void *DrawLineDest;
 extern unsigned char *HighCol;
-extern int (*PicoScanBegin)(unsigned int num);
-extern int (*PicoScanEnd)(unsigned int num);
 // utility
 #ifdef _ASM_DRAW_C
 void vidConvCpyRGB565(void *to, void *from, int pixels);
@@ -219,8 +218,6 @@ extern int p32x_ssh2_multiplier;
 
 // 32x/draw.c
 void PicoDraw32xSetFrameMode(int is_on, int only_32x);
-extern int (*PicoScan32xBegin)(unsigned int num);
-extern int (*PicoScan32xEnd)(unsigned int num);
 
 // sound.c
 extern int PsndRate,PsndLen;
diff --git a/pico/pico_int.h b/pico/pico_int.h
index dcd321ac..aaf2f502 100644
--- a/pico/pico_int.h
+++ b/pico/pico_int.h
@@ -540,6 +540,8 @@ PICO_INTERNAL void PicoFrameStart(void);
 void PicoDrawSync(int to, int blank_last_line);
 void BackFill(int reg7, int sh);
 void FinalizeLine555(int sh, int line);
+extern int (*PicoScanBegin)(unsigned int num);
+extern int (*PicoScanEnd)(unsigned int num);
 extern int DrawScanline;
 #define MAX_LINE_SPRITES 29
 extern unsigned char HighLnSpr[240][3 + MAX_LINE_SPRITES];
@@ -727,6 +729,8 @@ void p32x_poll_event(int cpu_mask, int is_vdp);
 void FinalizeLine32xRGB555(int sh, int line);
 void PicoDraw32xLayer(int offs, int lines, int mdbg);
 void PicoDraw32xLayerMdOnly(int offs, int lines);
+extern int (*PicoScan32xBegin)(unsigned int num);
+extern int (*PicoScan32xEnd)(unsigned int num);
 enum {
   PDM32X_OFF,
   PDM32X_32X_ONLY,
diff --git a/platform/common/emu.h b/platform/common/emu.h
index 90803a64..27864bec 100644
--- a/platform/common/emu.h
+++ b/platform/common/emu.h
@@ -43,9 +43,8 @@ extern int g_screen_height;
 
 enum {
 	EOPT_SCALE_NONE = 0,
-	EOPT_SCALE_SW_H,
-	EOPT_SCALE_HW_H,
-	EOPT_SCALE_HW_HV,
+	EOPT_SCALE_SW,
+	EOPT_SCALE_HW,
 };
 
 enum {
@@ -67,7 +66,8 @@ typedef struct _currentConfig_t {
 	int CPUclock;
 	int volume;
 	int gamma;
-	int scaling;  // gp2x: 0=center, 1=hscale, 2=hvscale, 3=hsoftscale; psp: bilinear filtering
+	int scaling;  // gp2x: EOPT_SCALE_*; psp: bilinear filtering
+	int vscaling;
 	int rotation; // for UIQ
 	float scale; // psp: screen scale
 	float hscale32, hscale40; // psp: horizontal scale
diff --git a/platform/common/menu.c b/platform/common/menu.c
index 35ab449c..4ee5c197 100644
--- a/platform/common/menu.c
+++ b/platform/common/menu.c
@@ -1606,7 +1606,7 @@ static int menu_loop_32x_options(menu_id id, int keys)
 {
 	static int sel = 0;
 
-	me_enable(e_menu_32x_options, MA_32XOPT_RENDERER, renderer_names32x != NULL);
+	me_enable(e_menu_32x_options, MA_32XOPT_RENDERER, renderer_names32x[0] != NULL);
 	me_loop(e_menu_32x_options, &sel, NULL);
 
 	return 0;
@@ -1834,7 +1834,7 @@ static menu_entry e_menu_options[] =
 	mee_onoff     ("Enable sound",             MA_OPT_ENABLE_SOUND,  currentConfig.EmuOpt, EOPT_EN_SOUND),
 	mee_cust      ("Sound Quality",            MA_OPT_SOUND_QUALITY, mh_opt_misc, mgn_opt_sound),
 	mee_enum_h    ("Confirm savestate",        MA_OPT_CONFIRM_STATES,currentConfig.confirm_save, men_confirm_save, h_confirm_save),
-	mee_range     (cpu_clk_name,               MA_OPT_CPU_CLOCKS,    currentConfig.CPUclock, 20, 900),
+	mee_range     ("",                         MA_OPT_CPU_CLOCKS,    currentConfig.CPUclock, 20, 900),
 	mee_handler   ("[Display options]",        menu_loop_gfx_options),
 	mee_handler   ("[Sega/Mega CD options]",   menu_loop_cd_options),
 #ifndef NO_32X
@@ -1851,7 +1851,10 @@ static menu_entry e_menu_options[] =
 static int menu_loop_options(menu_id id, int keys)
 {
 	static int sel = 0;
+	int i;
 
+	i = me_id2offset(e_menu_options, MA_OPT_CPU_CLOCKS);
+	e_menu_options[i].enabled = e_menu_options[i].name ? 1 : 0;
 	me_enable(e_menu_options, MA_OPT_SAVECFG_GAME, rom_loaded);
 	me_enable(e_menu_options, MA_OPT_LOADCFG, config_slot != config_slot_current);
 
@@ -2191,28 +2194,6 @@ void me_update_msg(const char *msg)
 
 // ------------ util ------------
 
-/* GP2X/wiz for now, probably extend later */
-void menu_plat_setup(int is_wiz)
-{
-	int i;
-
-	if (!is_wiz) {
-		me_enable(e_menu_gfx_options, MA_OPT_TEARING_FIX, 0);
-		i = me_id2offset(e_menu_gfx_options, MA_OPT_TEARING_FIX);
-		e_menu_gfx_options[i].need_to_save = 0;
-		return;
-	}
-
-	me_enable(e_menu_adv_options, MA_OPT_ARM940_SOUND, 0);
-	me_enable(e_menu_gfx_options, MA_OPT2_GAMMA, 0);
-	me_enable(e_menu_gfx_options, MA_OPT2_A_SN_GAMMA, 0);
-
-	i = me_id2offset(e_menu_gfx_options, MA_OPT_SCALING);
-	e_menu_gfx_options[i].max = 1;	/* only off and sw */
-	i = me_id2offset(e_menu_gfx_options, MA_OPT_ARM940_SOUND);
-	e_menu_gfx_options[i].need_to_save = 0;
-}
-
 /* hidden options for config engine only */
 static menu_entry e_menu_hidden[] =
 {
diff --git a/platform/common/menu.h b/platform/common/menu.h
index 64a70a74..fd807533 100644
--- a/platform/common/menu.h
+++ b/platform/common/menu.h
@@ -27,6 +27,7 @@ typedef enum
 	MA_MAIN_EXIT,
 	MA_OPT_RENDERER,
 	MA_OPT_SCALING,
+	MA_OPT_VSCALING,
 	MA_OPT_ACC_SPRITES,
 	MA_OPT_SHOW_FPS,
 	MA_OPT_FRAMESKIP,
@@ -195,7 +196,6 @@ extern int g_menuscreen_h;
 #endif
 
 void menu_init(void);
-void menu_plat_setup(int is_wiz);
 void text_out16(int x, int y, const char *texto, ...);
 void me_update_msg(const char *msg);
 
diff --git a/platform/common/plat.h b/platform/common/plat.h
index bc48e83a..eadc2a89 100644
--- a/platform/common/plat.h
+++ b/platform/common/plat.h
@@ -3,7 +3,6 @@ extern "C" {
 #endif
 
 /* stuff to be implemented by platform code */
-extern char cpu_clk_name[];
 extern const char *renderer_names[];
 extern const char *renderer_names32x[];
 
diff --git a/platform/gizmondo/emu.c b/platform/gizmondo/emu.c
index 86a5d8c6..c0211e6e 100644
--- a/platform/gizmondo/emu.c
+++ b/platform/gizmondo/emu.c
@@ -231,10 +231,10 @@ static void vidResetMode(void)
 	if (PicoOpt&0x10) {
 	} else if (currentConfig.EmuOpt&0x80) {
 		PicoDrawSetOutFormat(PDF_RGB555, 0);
-		PicoScanBegin = EmuScanBegin16;
+		PicoDrawSetCallbacks(EmuScanBegin16, NULL);
 	} else {
 		PicoDrawSetOutFormat(PDF_NONE, 0);
-		PicoScanBegin = EmuScanBegin8;
+		PicoDrawSetCallbacks(EmuScanBegin8, NULL);
 	}
 	if ((PicoOpt&0x10) || !(currentConfig.EmuOpt&0x80)) {
 		// setup pal for 8-bit modes
@@ -307,7 +307,7 @@ void pemu_forced_frame(int opts, int no_scale)
 		giz_screen = fb_lock(1);
 
 	PicoDrawSetOutFormat(PDF_RGB555, 0);
-	PicoScanBegin = EmuScanBegin16;
+	PicoDrawSetCallbacks(EmuScanBegin16, NULL);
 	Pico.m.dirtyPal = 1;
 	PicoFrameDrawOnly();
 
diff --git a/platform/gp2x/PicoDrive.gpe b/platform/gp2x/PicoDrive.gpe
index e5c4914f..1c065185 100644
--- a/platform/gp2x/PicoDrive.gpe
+++ b/platform/gp2x/PicoDrive.gpe
@@ -2,9 +2,12 @@
 
 export LD_PRELOAD=
 
-export POLLUX_RAM_TIMINGS='ram_timings=2,9,4,1,1,1,1'
-export POLLUX_LCD_TIMINGS_NTSC='lcd_timings=397,1,37,277,341,0,17,337;clkdiv0=9'
-export POLLUX_LCD_TIMINGS_PAL='lcd_timings=428,1,37,277,341,0,17,337;clkdiv0=10'
+if ! [ -e /dev/accel ]; then
+	# Wiz
+	export POLLUX_RAM_TIMINGS='ram_timings=2,9,4,1,1,1,1'
+	export POLLUX_LCD_TIMINGS_NTSC='lcd_timings=397,1,37,277,341,0,17,337;clkdiv0=9'
+	export POLLUX_LCD_TIMINGS_PAL='lcd_timings=428,1,37,277,341,0,17,337;clkdiv0=10'
+fi
 
 ./PicoDrive "$@"
 
diff --git a/platform/gp2x/emu.c b/platform/gp2x/emu.c
index b019c3b0..75200763 100644
--- a/platform/gp2x/emu.c
+++ b/platform/gp2x/emu.c
@@ -43,28 +43,15 @@ 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;
+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)
@@ -83,12 +70,9 @@ void pemu_prep_defconfig(void)
 
 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)
@@ -114,6 +98,11 @@ 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)
@@ -277,6 +266,46 @@ 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);
@@ -358,12 +387,10 @@ 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)
@@ -458,77 +485,73 @@ 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 {
+			PicoDrawSetOutFormat(PDF_NONE, 0);
 			PicoDraw32xSetFrameMode(1, (renderer == RT_16BIT) ? 1 : 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 : osd_text16;
+	else
+		osd_text = (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX) ? osd_text8_rot : osd_text8;
+
 	if (currentConfig.EmuOpt & EOPT_WIZ_TEAR_FIX)
 		gp2x_mode = -gp2x_mode;
+
+	gp2x_video_wait_vsync();
 	gp2x_video_changemode(gp2x_mode);
 
 	if (!is_16bit_mode()) {
@@ -539,19 +562,60 @@ 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);
+
 	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);
@@ -559,7 +623,7 @@ 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)
@@ -730,22 +794,29 @@ void pemu_sound_wait(void)
 	// don't need to do anything, writes will block by themselves
 }
 
-
 void pemu_forced_frame(int opts, int no_scale)
 {
 	int po_old = PicoOpt;
 
+	doing_bg_frame = 1;
 	PicoOpt &= ~POPT_ALT_RENDERER;
 	PicoOpt |= opts|POPT_ACC_SPRITES;
 
+	memset32(g_screen_ptr, 0, g_screen_width * g_screen_height * 2 / 4);
+
 	PicoDrawSetOutFormat(PDF_RGB555, 1);
 	PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 	PicoDraw32xSetFrameMode(0, 0);
-	PicoScanBegin = NULL;
-	PicoScanEnd = NULL;
+	PicoDrawSetCallbacks(NULL, NULL);
 	Pico.m.dirtyPal = 1;
-	PicoFrameDrawOnly();
 
+	if (no_scale == -9)
+		// yes I'm lazy, see pemu_forced_frame call below
+		PicoFrame();
+	else
+		PicoFrameDrawOnly();
+
+	doing_bg_frame = 0;
 	PicoOpt = po_old;
 }
 
@@ -753,30 +824,6 @@ 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)
 {
@@ -842,7 +889,7 @@ 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;
@@ -869,8 +916,8 @@ 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();
@@ -881,26 +928,11 @@ void pemu_loop_prep(void)
 
 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;
+	pemu_forced_frame(POPT_EN_SOFTSCALE, -9);
+	g_menubg_src_ptr = g_screen_ptr;
 }
 
 const char *plat_get_credits(void)
diff --git a/platform/gp2x/in_gp2x.c b/platform/gp2x/in_gp2x.c
index eb97a7e9..9894669c 100644
--- a/platform/gp2x/in_gp2x.c
+++ b/platform/gp2x/in_gp2x.c
@@ -8,7 +8,7 @@
 
 #include "../common/input.h"
 #include "in_gp2x.h"
-#include "soc.h"
+#include "plat_gp2x.h"
 
 #define IN_PREFIX "gp2x:"
 #define IN_GP2X_NBUTTONS 32
@@ -92,15 +92,12 @@ static int in_gp2x_get_fake_bits(void)
 
 static void in_gp2x_probe(void)
 {
-	gp2x_soc_t soc;
-
-	soc = soc_detect();
-	switch (soc)
+	switch (gp2x_dev_id)
 	{
-	case SOCID_MMSP2:
+	case GP2X_DEV_GP2X:
 		in_gp2x_get_bits = in_gp2x_get_mmsp2_bits;
 		break;
-	case SOCID_POLLUX:
+	case GP2X_DEV_WIZ:
 		gpiodev = open("/dev/GPIO", O_RDONLY);
 		if (gpiodev < 0) {
 			perror("in_gp2x: couldn't open /dev/GPIO");
@@ -320,10 +317,8 @@ static int in_gp2x_clean_binds(void *drv_data, int *binds, int *def_binds)
 void in_gp2x_init(void *vdrv)
 {
 	in_drv_t *drv = vdrv;
-	gp2x_soc_t soc;
 
-	soc = soc_detect();
-	if (soc == SOCID_POLLUX)
+	if (gp2x_dev_id == GP2X_DEV_WIZ)
 		in_gp2x_keys[BTN_START] = "MENU";
 	
 	in_gp2x_combo_keys = in_gp2x_combo_acts = 0;
diff --git a/platform/gp2x/menu.c b/platform/gp2x/menu.c
index 9dbabe46..9e53b253 100644
--- a/platform/gp2x/menu.c
+++ b/platform/gp2x/menu.c
@@ -1,5 +1,6 @@
 #include <time.h>
 #include "soc.h"
+#include "plat_gp2x.h"
 
 static void menu_main_plat_draw(void)
 {
@@ -60,10 +61,11 @@ static const char *mgn_aopt_gamma(menu_id id, int *offs)
 }
 
 
-const char *men_scaling_opts[] = { "OFF", "sw horizontal", "hw horizontal", "hw horiz. + vert", NULL };
+const char *men_scaling_opts[] = { "OFF", "software", "hardware", NULL };
 
 #define MENU_OPTIONS_GFX \
-	mee_enum      ("Scaling",                  MA_OPT_SCALING,        currentConfig.scaling, men_scaling_opts), \
+	mee_enum      ("Horizontal scaling",       MA_OPT_SCALING,        currentConfig.scaling, men_scaling_opts), \
+	mee_enum      ("Vertical scaling",         MA_OPT_VSCALING,       currentConfig.vscaling, men_scaling_opts), \
 	mee_onoff     ("Tearing Fix",              MA_OPT_TEARING_FIX,    currentConfig.EmuOpt, EOPT_WIZ_TEAR_FIX), \
 	mee_range_cust("Gamma correction",         MA_OPT2_GAMMA,         currentConfig.gamma, 1, 300, mgn_aopt_gamma), \
 	mee_onoff     ("A_SN's gamma curve",       MA_OPT2_A_SN_GAMMA,    currentConfig.EmuOpt, EOPT_A_SN_GAMMA), \
@@ -76,3 +78,47 @@ const char *men_scaling_opts[] = { "OFF", "sw horizontal", "hw horizontal", "hw
 	mee_onoff     ("SVP dynarec",              MA_OPT2_SVP_DYNAREC,   PicoOpt, POPT_EN_SVP_DRC), \
 	mee_onoff     ("Status line in main menu", MA_OPT2_STATUS_LINE,   currentConfig.EmuOpt, EOPT_SHOW_RTC),
 
+
+static menu_entry e_menu_adv_options[];
+static menu_entry e_menu_gfx_options[];
+static menu_entry e_menu_options[];
+
+void gp2x_menu_init(void)
+{
+	static menu_entry *cpu_clk_ent;
+	int i;
+
+	i = me_id2offset(e_menu_options, MA_OPT_CPU_CLOCKS);
+	cpu_clk_ent = &e_menu_options[i];
+
+	/* disable by default.. */
+	me_enable(e_menu_adv_options, MA_OPT_ARM940_SOUND, 0);
+	me_enable(e_menu_gfx_options, MA_OPT_TEARING_FIX, 0);
+	me_enable(e_menu_gfx_options, MA_OPT2_GAMMA, 0);
+	me_enable(e_menu_gfx_options, MA_OPT2_A_SN_GAMMA, 0);
+
+	switch (gp2x_dev_id) {
+	case GP2X_DEV_GP2X:
+		me_enable(e_menu_adv_options, MA_OPT_ARM940_SOUND, 1);
+		me_enable(e_menu_gfx_options, MA_OPT2_GAMMA, 1);
+		me_enable(e_menu_gfx_options, MA_OPT2_A_SN_GAMMA, 1);
+		cpu_clk_ent->name = "GP2X CPU clocks";
+		break;
+	case GP2X_DEV_WIZ:
+		me_enable(e_menu_gfx_options, MA_OPT_TEARING_FIX, 1);
+		cpu_clk_ent->name = "Wiz/Caanoo CPU clock";
+		break;
+	case GP2X_DEV_CAANOO:
+		cpu_clk_ent->name = "Wiz/Caanoo CPU clock";
+		break;
+	default:
+		break;
+	}
+
+	if (gp2x_set_cpuclk == NULL)
+		cpu_clk_ent->name = "";
+
+	if (gp2x_dev_id != GP2X_DEV_GP2X)
+		men_scaling_opts[2] = NULL; /* leave only off and sw */
+}
+
diff --git a/platform/gp2x/plat.c b/platform/gp2x/plat.c
index f0be14e7..6fce7bc2 100644
--- a/platform/gp2x/plat.c
+++ b/platform/gp2x/plat.c
@@ -16,14 +16,15 @@
 
 /* GP2X local */
 int default_cpu_clock;
+int gp2x_dev_id;
+int gp2x_current_bpp;
 void *gp2x_screens[4];
 
 void gp2x_video_changemode(int bpp)
 {
 	gp2x_video_changemode_ll(bpp);
 
-  	gp2x_memset_all_buffers(0, 0, 320*240*2);
-	gp2x_video_flip();
+	gp2x_current_bpp = bpp < 0 ? -bpp : bpp;
 }
 
 static void gp2x_memcpy_buffers(int buffers, void *data, int offset, int len)
@@ -65,17 +66,17 @@ void gp2x_make_fb_bufferable(int yes)
 }
 
 /* common */
-char cpu_clk_name[16] = "GP2X CPU clocks";
-
 void plat_video_menu_enter(int is_rom_loaded)
 {
-	/* try to switch nicely avoiding tearing on Wiz */
-	gp2x_video_wait_vsync();
-	memset(gp2x_screens[0], 0, 320*240*2);
-	memset(gp2x_screens[1], 0, 320*240*2);
-	gp2x_video_flip2();
-	gp2x_video_wait_vsync();
-	gp2x_video_wait_vsync();
+	if (gp2x_current_bpp != 16 || gp2x_dev_id == GP2X_DEV_WIZ) {
+		/* try to switch nicely avoiding glitches */
+		gp2x_video_wait_vsync();
+		memset(gp2x_screens[0], 0, 320*240*2);
+		memset(gp2x_screens[1], 0, 320*240*2);
+		gp2x_video_flip2(); // might flip to fb2/3
+		gp2x_video_flip2(); // ..so we do it again
+		// gp2x_video_wait_vsync();
+	}
 
 	// switch to 16bpp
 	gp2x_video_changemode_ll(16);
@@ -98,21 +99,34 @@ void plat_video_menu_end(void)
 void plat_early_init(void)
 {
 	gp2x_soc_t soc;
+	FILE *f;
 
 	soc = soc_detect();
 	switch (soc)
 	{
 	case SOCID_MMSP2:
 		default_cpu_clock = 200;
+		gp2x_dev_id = GP2X_DEV_GP2X;
 		break;
 	case SOCID_POLLUX:
-		strcpy(cpu_clk_name, "Wiz CPU clock");
 		default_cpu_clock = 533;
+		f = fopen("/dev/accel", "rb");
+		if (f) {
+			printf("detected Caanoo\n");
+			gp2x_dev_id = GP2X_DEV_CAANOO;
+			fclose(f);
+		}
+		else {
+			printf("detected Wiz\n");
+			gp2x_dev_id = GP2X_DEV_WIZ;
+		}
 		break;
 	default:
 		printf("could not recognize SoC, running in dummy mode.\n");
 		break;
 	}
+
+	gp2x_menu_init();
 }
 
 void plat_init(void)
@@ -124,11 +138,9 @@ void plat_init(void)
 	{
 	case SOCID_MMSP2:
 		mmsp2_init();
-		menu_plat_setup(0);
 		break;
 	case SOCID_POLLUX:
 		pollux_init();
-		menu_plat_setup(1);
 		break;
 	default:
 		dummy_init();
diff --git a/platform/gp2x/plat_gp2x.h b/platform/gp2x/plat_gp2x.h
index 5a59452d..c77e061f 100644
--- a/platform/gp2x/plat_gp2x.h
+++ b/platform/gp2x/plat_gp2x.h
@@ -12,4 +12,18 @@ void gp2x_make_fb_bufferable(int yes);
 /* input */
 int gp2x_touchpad_read(int *x, int *y);
 
+/* misc */
+enum {
+	GP2X_DEV_GP2X = 1,
+	GP2X_DEV_WIZ,
+	GP2X_DEV_CAANOO,
+};
+extern int gp2x_dev_id;
+extern int gp2x_current_bpp;
+
+unsigned int plat_get_ticks_ms_good(void);
+unsigned int plat_get_ticks_us_good(void);
+
+void gp2x_menu_init(void);
+
 #endif
diff --git a/platform/gp2x/soc.c b/platform/gp2x/soc.c
index 5de0d237..43ebd85c 100644
--- a/platform/gp2x/soc.c
+++ b/platform/gp2x/soc.c
@@ -39,7 +39,7 @@ gp2x_soc_t soc_detect(void)
 	int memdev;
 	int i;
 
-	if (ret != -2)
+	if ((int)ret != -2)
 		/* already detected */
 		return ret;
 
diff --git a/platform/gp2x/soc_dummy.c b/platform/gp2x/soc_dummy.c
index ad01ab76..99910825 100644
--- a/platform/gp2x/soc_dummy.c
+++ b/platform/gp2x/soc_dummy.c
@@ -35,11 +35,6 @@ static void gp2x_video_wait_vsync_(void)
 {
 }
 
-/* CPU clock */
-static void gp2x_set_cpuclk_(unsigned int mhz)
-{
-}
-
 /* RAM timings */
 static void set_ram_timings_(void)
 {
@@ -81,8 +76,6 @@ void dummy_init(void)
 	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
 	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
 
-	gp2x_set_cpuclk = gp2x_set_cpuclk_;
-
 	set_lcd_custom_rate = set_lcd_custom_rate_;
 	unset_lcd_custom_rate = unset_lcd_custom_rate_;
 	set_lcd_gamma = set_lcd_gamma_;
diff --git a/platform/gp2x/soc_mmsp2.c b/platform/gp2x/soc_mmsp2.c
index 155cdf94..35748d84 100644
--- a/platform/gp2x/soc_mmsp2.c
+++ b/platform/gp2x/soc_mmsp2.c
@@ -41,9 +41,6 @@ static unsigned short gp2x_screenaddr_old[4];
 static unsigned short memtimex_old[2];
 static unsigned short reg0910;
 
-extern unsigned int plat_get_ticks_ms_good(void);
-extern unsigned int plat_get_ticks_us_good(void);
-
 /* video stuff */
 static void gp2x_video_flip_(void)
 {
diff --git a/platform/gp2x/soc_pollux.c b/platform/gp2x/soc_pollux.c
index 3b2ca2df..b343e149 100644
--- a/platform/gp2x/soc_pollux.c
+++ b/platform/gp2x/soc_pollux.c
@@ -21,11 +21,12 @@
 #include "soc.h"
 #include "plat_gp2x.h"
 #include "../common/emu.h"
+#include "../common/plat.h"
 #include "../common/arm_utils.h"
 #include "pollux_set.h"
 
 static volatile unsigned short *memregs;
-static volatile unsigned long  *memregl;
+static volatile unsigned int   *memregl;
 static int memdev = -1;
 static int battdev = -1;
 
@@ -241,10 +242,29 @@ static void timer_cleanup(void)
 	TIMER_REG(0x44) = 0;	/* dividers back to default */
 }
 
+/* note: both PLLs are programmed the same way,
+ * the databook incorrectly states that PLL1 differs */
+static int decode_pll(unsigned int reg)
+{
+	long long v;
+	int p, m, s;
+
+	p = (reg >> 18) & 0x3f;
+	m = (reg >> 8) & 0x3ff;
+	s = reg & 0xff;
+
+	if (p == 0)
+		p = 1;
+
+	v = 27000000; // master clock
+	v = v * m / (p << s);
+	return v;
+}
+
 void pollux_init(void)
 {
 	struct fb_fix_screeninfo fbfix;
-	int i, ret;
+	int i, ret, rate;
 
 	memdev = open("/dev/mem", O_RDWR);
 	if (memdev == -1) {
@@ -297,13 +317,32 @@ void pollux_init(void)
 	if (battdev < 0)
 		perror("Warning: could't open pollux_batt");
 
+	/* find what PLL1 runs at, for the timer */
+	rate = decode_pll(memregl[0xf008>>2]);
+	printf("PLL1 @ %dHz\n", rate);
+	rate /= 1000000;
+
 	/* setup timer */
-	if (TIMER_REG(0x08) & 8)
-		timer_cleanup();
+	if (1 <= rate && rate <= 256) {
+		if (TIMER_REG(0x08) & 8) {
+			fprintf(stderr, "warning: timer in use, overriding!\n");
+			timer_cleanup();
+		}
+
+		TIMER_REG(0x44) = ((rate - 1) << 4) | 2; /* using PLL1, divide by it's rate */
+		TIMER_REG(0x40) = 0x0c;  /* clocks on */
+		TIMER_REG(0x08) = 0x6b;  /* run timer, clear irq, latch value */
+
+		gp2x_get_ticks_ms = gp2x_get_ticks_ms_;
+		gp2x_get_ticks_us = gp2x_get_ticks_us_;
+	}
+	else {
+		fprintf(stderr, "warning: could not make use of timer\n");
 
-	TIMER_REG(0x44) = 0x922; /* using PLL1, divider value 147 */
-	TIMER_REG(0x40) = 0x0c;  /* clocks on */
-	TIMER_REG(0x08) = 0x6b;  /* run timer, clear irq, latch value */
+		// those functions are actually not good at all on Wiz kernel
+		gp2x_get_ticks_ms = plat_get_ticks_ms_good;
+		gp2x_get_ticks_us = plat_get_ticks_us_good;
+	}
 
 	pllsetreg0 = memregl[0xf004>>2];
 	memtimex_old[0] = memregs[0x14802>>1];
@@ -316,7 +355,15 @@ void pollux_init(void)
 	gp2x_video_RGB_setscaling = gp2x_video_RGB_setscaling_;
 	gp2x_video_wait_vsync = gp2x_video_wait_vsync_;
 
-	gp2x_set_cpuclk = gp2x_set_cpuclk_;
+	/* some firmwares have sys clk on PLL0, we can't adjust CPU clock
+	 * by reprogramming the PLL0 then, as it overclocks system bus */
+	if ((memregl[0xf000>>2] & 0x03000030) == 0x01000000)
+		gp2x_set_cpuclk = gp2x_set_cpuclk_;
+	else {
+		fprintf(stderr, "unexpected PLL config (%08x), overclocking disabled\n",
+			memregl[0xf000>>2]);
+		gp2x_set_cpuclk = NULL;
+	}
 
 	set_lcd_custom_rate = set_lcd_custom_rate_;
 	unset_lcd_custom_rate = unset_lcd_custom_rate_;
@@ -325,9 +372,6 @@ void pollux_init(void)
 	set_ram_timings = set_ram_timings_;
 	unset_ram_timings = unset_ram_timings_;
 	gp2x_read_battery = gp2x_read_battery_;
-
-	gp2x_get_ticks_ms = gp2x_get_ticks_ms_;
-	gp2x_get_ticks_us = gp2x_get_ticks_us_;
 }
 
 void pollux_finish(void)
diff --git a/platform/linux/emu.c b/platform/linux/emu.c
index db5d6be8..65d868b5 100644
--- a/platform/linux/emu.c
+++ b/platform/linux/emu.c
@@ -17,7 +17,6 @@
 
 
 static short __attribute__((aligned(4))) sndBuffer[2*44100/50];
-char cpu_clk_name[] = "unused";
 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 };
@@ -125,9 +124,6 @@ void pemu_finalize_frame(const char *fps, const char *notice)
 
 static void apply_renderer(void)
 {
-	PicoScanBegin = NULL;
-	PicoScanEnd = NULL;
-
 	switch (currentConfig.renderer) {
 	case RT_16BIT:
 		PicoOpt &= ~POPT_ALT_RENDERER;
diff --git a/platform/pandora/menu.c b/platform/pandora/menu.c
index ae2a0790..bcbbc1ca 100644
--- a/platform/pandora/menu.c
+++ b/platform/pandora/menu.c
@@ -81,6 +81,7 @@ static int menu_loop_cscaler(menu_id id, int keys)
 #include <errno.h>
 
 static menu_entry e_menu_gfx_options[];
+static menu_entry e_menu_options[];
 
 void pnd_menu_init(void)
 {
@@ -139,5 +140,8 @@ void pnd_menu_init(void)
 	i = me_id2offset(e_menu_gfx_options, MA_OPT3_FILTERING);
 	e_menu_gfx_options[i].data = (void *)mfilters;
 	pnd_filter_list = mfilters;
+
+	i = me_id2offset(e_menu_options, MA_OPT_SCALING);
+	e_menu_options[i]->name = "Max CPU clock";
 }
 
diff --git a/platform/pandora/plat.c b/platform/pandora/plat.c
index e259f857..99519732 100644
--- a/platform/pandora/plat.c
+++ b/platform/pandora/plat.c
@@ -39,7 +39,6 @@ static unsigned char __attribute__((aligned(4))) fb_copy[g_screen_width * g_scre
 unsigned char *PicoDraw2FB = temp_frame;
 const char *renderer_names[] = { NULL };
 const char *renderer_names32x[] = { NULL };
-char cpu_clk_name[] = "Max CPU clock";
 
 static int get_cpu_clock(void)
 {
@@ -371,9 +370,8 @@ void emu_video_mode_change(int start_line, int line_count, int is_32cols)
 {
 	int fb_w = 320, fb_h = 240, fb_left = 0, fb_right = 0, fb_top = 0, fb_bottom = 0;
 
-	PicoScanBegin = emuscan;
-	PicoScanEnd = NULL;
 	PicoDrawSetOutFormat(PDF_RGB555, 1);
+	PicoDrawSetCallbacks(emuscan, NULL);
 
 	if (is_32cols) {
 		fb_w = 256;
diff --git a/platform/psp/emu.c b/platform/psp/emu.c
index 77b20d19..8ee4a96d 100644
--- a/platform/psp/emu.c
+++ b/platform/psp/emu.c
@@ -466,8 +466,7 @@ static void vidResetMode(void)
 
 	// slow rend.
 	PicoDrawSetOutFormat(PDF_NONE, 0);
-	PicoScanBegin = EmuScanSlowBegin;
-	PicoScanEnd = EmuScanSlowEnd;
+	PicoDrawSetCallbacks(EmuScanSlowBegin, EmuScanSlowEnd);
 
 	localPal[0xe0] = 0;
 	localPal[0xf0] = 0x001f;
@@ -683,8 +682,7 @@ void pemu_forced_frame(int opts, int no_scale)
 	memset32_uncached((int *)psp_screen + 512*264*2/4, 0, 512*8*2/4);
 
 	PicoDrawSetOutFormat(PDF_NONE, 0);
-	PicoScanBegin = EmuScanSlowBegin;
-	PicoScanEnd = EmuScanSlowEnd;
+	PicoDrawSetCallbacks(EmuScanSlowBegin, EmuScanSlowEnd);
 	EmuScanPrepare();
 	PicoFrameDrawOnly();
 	blit1();
diff --git a/platform/win32/plat.c b/platform/win32/plat.c
index 15aff220..f83a9011 100644
--- a/platform/win32/plat.c
+++ b/platform/win32/plat.c
@@ -16,8 +16,6 @@ unsigned char *PicoDraw2FB = PicoDraw2FB_;
 const char *renderer_names[] = { NULL };
 const char *renderer_names32x[] = { NULL };
 
-char cpu_clk_name[] = "unused";
-
 void plat_init(void)
 {
 	g_screen_ptr = (void *)screen_buff;