added 64k NTSC, precision emulation, 320X240 resolution, frame rate setting, screen menu

src/VirtualKeyboard.c

@@ -67,8 +67,8 @@ void draw()
 	int y,x;
 	int screen_w = VirtualKeyboard.screen->w;
 	int screen_h = VirtualKeyboard.screen->h;
-	int key_w = 54;
+	int key_w = 54/RATIO;
-	int key_h = 36;
+	int key_h = 36/RATIO;
 	int border_x = (screen_w - (key_w * KEY_COLS)) / 2;
 	int border_y = (screen_h - (key_h * KEY_ROWS)) / 2;
 	SDL_Rect bg_rect = {border_x, border_y,
@@ -170,7 +170,7 @@ struct virtkey *get_key_internal()
 struct virtkey* get_key()
 {
 	virtkey_t *key;
-	SDL_Rect rect = {32, 120, FULL_DISPLAY_X-64, FULL_DISPLAY_Y-250};
+	SDL_Rect rect = {32/RATIO, 120/RATIO, FULL_DISPLAY_X-64/RATIO, FULL_DISPLAY_Y-250/RATIO};
 	
 	keys[3 * KEY_COLS + 0 ].is_done = 0; //Caps Shit
 	keys[3 * KEY_COLS + 8 ].is_done = 0; //Sym Shift

src/cargador.c

@@ -591,9 +591,10 @@ void load_snap(struct z80snapshot *snap) {
   	printf("Mode 128K\n");
     ordenador.mode128k=1; // 128k mode
     ordenador.issue=3;
+	ordenador.videosystem=0;
     ResetComputer();
     printf("Pager: %X\n",snap->pager);
-    Z80free_Out(0x7FFD,snap->pager);
+    Z80free_Out_fake(0x7FFD,snap->pager);
     break;
   default:
     break;
@@ -642,7 +643,7 @@ void load_snap(struct z80snapshot *snap) {
 	printf("IFF1:%x IFF2:%x\n",snap->IFF1,snap->IFF1);
   procesador.IM=snap->Imode;
   printf("IM:%x\n",snap->Imode);
-  Z80free_Out(0xFFFE,((snap->border&0x07)|0x10));
+  Z80free_Out_fake(0xFFFE,((snap->border&0x07)|0x10));
 
   switch(snap->type) {
   case 0: // 48K

src/computer.c

@@ -33,6 +33,7 @@
 #include "microdrive.h"
 #include "Virtualkeyboard.h"
 #include "gui_sdl.h"
+#include "menu_sdl.h"
 #if defined(GEKKO)
 # include <ogc/system.h>
 # include <wiiuse/wpad.h> 
@@ -47,6 +48,7 @@ extern FILE *fdebug;
  #endif
 #endif
 
+
 /* Returns the bus value when reading a port without a periferial */
 
 inline byte bus_empty () {
@@ -60,13 +62,19 @@ inline byte bus_empty () {
 /* calls all the routines that emulates the computer, runing them for 'tstados'
    tstates */
 
-inline void emulate (int tstados) {
+inline void emulate_screen (int tstados) {
 
-	if((procesador.I>=0x40)&&(procesador.I<=0x7F)) {
+	if((procesador.I & 0xC0) == 0x40) { // (procesador.I>=0x40)&&(procesador.I<=0x7F)
 		ordenador.screen_snow=1;
 	} else
 		ordenador.screen_snow=0;
-	show_screen (tstados);
+		
+	if (ordenador.precision) show_screen_precision (tstados);
+	else show_screen(tstados);
+}
+
+inline void emulate (int tstados) {
+
 	play_ay (tstados);
 	play_sound (tstados);
 	tape_read (ordenador.tap_file, tstados);
@@ -87,10 +95,12 @@ void computer_init () {
 	ordenador.port254 = 0;
 	ordenador.issue = 3;
 	ordenador.mode128k = 0;
+	ordenador.videosystem = 0; //PAL
 	ordenador.joystick[0] = 1; //Kemposton
 	ordenador.joystick[1] = 0; // Cursor
 	ordenador.rumble[0] = 0;
 	ordenador.rumble[1] = 0;
+	ordenador.precision = 0;
 
 	ordenador.tape_readed = 0;
 	ordenador.pause = 1;	// tape stop
@@ -124,6 +134,10 @@ void computer_init () {
 	ordenador.vol_c = 0;
 	ordenador.tst_ay = 0;
 	ordenador.tst_ay2 = 0;
+	ordenador.wr = 0;
+	ordenador.r_fetch = 0;
+	ordenador.io = 0;
+	ordenador.contention = 0;
 
 	ordenador.ayval_a = 0;
 	ordenador.ayval_b = 0;
@@ -144,6 +158,8 @@ void computer_init () {
 	strcpy (ordenador.SmbShare, "Share");
 	strcpy (ordenador.SmbIp, "192.168.0.1");
 	ordenador.autoconf=0;
+	
+	ordenador.cpufreq = 3500000; // values for 48K mode
 }
 
 void computer_set_palete() {
@@ -360,6 +376,7 @@ void register_screen (SDL_Surface * pantalla) {
 	ordenador.screen = pantalla;
 
 	ordenador.border = 0;
+	ordenador.border_p = 0;
 	ordenador.currline = 0;
 	ordenador.currpix = 0;
 	ordenador.flash = 0;
@@ -372,8 +389,6 @@ void register_screen (SDL_Surface * pantalla) {
 		ordenador.init_line = 0;
 		ordenador.next_line = 640;
 		ordenador.next_scanline = 640;
-		ordenador.first_line = 40;
-		ordenador.last_line = 280;
 		ordenador.first_pixel = 16;
 		ordenador.last_pixel = 336;
 		ordenador.next_pixel = 1;
@@ -383,8 +398,6 @@ void register_screen (SDL_Surface * pantalla) {
 		ordenador.init_line = 65;
 		ordenador.next_line = 160;
 		ordenador.next_scanline = 160;
-		ordenador.first_line = 40;
-		ordenador.last_line = 280;
 		ordenador.first_pixel = 0;
 		ordenador.last_pixel = 351;
 		ordenador.next_pixel = 1;
@@ -394,8 +407,6 @@ void register_screen (SDL_Surface * pantalla) {
 		ordenador.init_line = 479;
 		ordenador.next_line = -(307202);
 		ordenador.next_scanline = -1;
-		ordenador.first_line = 40;
-		ordenador.last_line = 280;
 		ordenador.first_pixel = 16;
 		ordenador.last_pixel = 336;
 		ordenador.next_pixel = 480;
@@ -405,8 +416,6 @@ void register_screen (SDL_Surface * pantalla) {
 		ordenador.init_line = 0;
 		ordenador.next_line = 0;
 		ordenador.next_scanline = 0;
-		ordenador.first_line = 40;
-		ordenador.last_line = 280;
 		ordenador.first_pixel = 0;
 		ordenador.last_pixel = 319;
 		ordenador.next_pixel = 1;
@@ -424,6 +433,7 @@ void register_screen (SDL_Surface * pantalla) {
 
 	ordenador.pixel = ((unsigned char *) (ordenador.screen->pixels)) +	ordenador.init_line;
 	ordenador.interr = 0;
+	ordenador.readkeyboard = 0;
 	
 	ordenador.p_translt = ordenador.translate;
 	ordenador.p_translt2 = ordenador.translate2;
@@ -431,7 +441,7 @@ void register_screen (SDL_Surface * pantalla) {
 	ordenador.contador_flash = 0;
 	ordenador.readed = 0;
 
-	ordenador.contended_zone=0;
+	//ordenador.contended_zone=0;
 	ordenador.cicles_counter=0;
 	
 	ordenador.tstados_counter_sound = 0;
@@ -439,8 +449,6 @@ void register_screen (SDL_Surface * pantalla) {
 	ordenador.num_buff = 0;	// first buffer
 	ordenador.sound_cuantity = 0;
 	ordenador.sound_current_value = 0;
-	ordenador.pixancho = 447;
-	ordenador.pixalto = 311;	// values for 48K mode
 }
 
 void set_memory_pointers () {
@@ -514,38 +522,48 @@ void set_memory_pointers () {
 /* Paints the spectrum screen during the TSTADOS tstates that the Z80 used
 to execute last instruction */
 
+
 inline void show_screen (int tstados) {
 
-	static unsigned char temporal, ink, paper, fflash, tmp2;
+	static unsigned char temporal, temporal3, ink, paper, fflash, tmp2;
+
 
 	ordenador.tstados_counter += tstados;
 	ordenador.cicles_counter += tstados;
 	
 	if (curr_frames<jump_frames) { //Jump the frame drawing
-		if (ordenador.tstados_counter>=69888) {
+		if (ordenador.tstados_counter>=ordenador.tstatodos_frame) {
-			ordenador.tstados_counter-=69888;
+			ordenador.tstados_counter-=ordenador.tstatodos_frame;
 			ordenador.interr = 1;
+			if ((ordenador.turbo == 0) || (curr_frames%7 == 0)) ordenador.readkeyboard = 1;
 			curr_frames++;
 		}
 		return;
 	}
 	
 	fflash = 0; // flash flag
+	
 	while (ordenador.tstados_counter > 3) {
 		ordenador.tstados_counter -= 4;
 		
+		//test if current pixel is outside visible area
+		
+		if ((ordenador.currline >= ordenador.first_line) && (ordenador.currline < ordenador.last_line)&&
+		(ordenador.currpix > 15) && (ordenador.currpix < 336))
+		{
+		
+		
 		// test if current pixel is for border or for user area
 
-		if ((ordenador.currline < 64) || (ordenador.currline > 255)
+		if ((ordenador.currline < ordenador.upper_border_line ) || (ordenador.currline >= ordenador.lower_border_line)
 			|| (ordenador.currpix < 48) || (ordenador.currpix > 303)) {
 			
 			// is border
 				
-			ordenador.contended_zone=0; // no contention here
 			if (ordenador.ulaplus) {
-				paint_pixels (255, ordenador.border+24, 0);	// paint 8 pixels with BORDER color
+				paint_pixels (255, ordenador.border+24, 0, 8);	// paint 8 pixels with BORDER color
 			} else {
-				paint_pixels (255, ordenador.border, 0);	// paint 8 pixels with BORDER color
+				paint_pixels (255, ordenador.border, 0, 8);	// paint 8 pixels with BORDER color
 			}
 
 			ordenador.bus_value = 255;
@@ -554,10 +572,9 @@ inline void show_screen (int tstados) {
 
 			// is user area. We search for ink and paper colours
 			
-			ordenador.contended_zone=1; // can have contention
-			
 			temporal = ordenador.memoria[(*ordenador.p_translt2) + ordenador.video_offset];	// attributes
 			ordenador.bus_value = temporal;
+	
 			ink = temporal & 0x07;	// ink colour
 			paper = (temporal >> 3) & 0x07;	// paper colour
 			if (ordenador.ulaplus) {
@@ -575,18 +592,23 @@ inline void show_screen (int tstados) {
 			// Snow Effect
 
 			if(ordenador.screen_snow) {
-				temporal = ordenador.memoria[(((*ordenador.p_translt) + (ordenador.video_offset))&0xFFFFFF00)+(procesador.R)];	// data with snow
+				temporal3 = ordenador.memoria[(((*ordenador.p_translt) + (ordenador.video_offset))&0xFFFFFF00)+(procesador.R)];	// data with snow
 				ordenador.screen_snow=0; // no more snow for now
 			} else
-				temporal = ordenador.memoria[(*ordenador.p_translt) + ordenador.video_offset];	// data
+				temporal3 = ordenador.memoria[(*ordenador.p_translt) + ordenador.video_offset];	// bitmap	// bitmap
 				
 			ordenador.p_translt++;
 			ordenador.p_translt2++;
+			
 			if ((fflash) && (ordenador.flash))
-				paint_pixels (temporal, paper, ink);	// if FLASH, invert PAPER and INK
+				paint_pixels (temporal3, paper, ink, 8);	// if FLASH, invert PAPER and INK
 			else
-				paint_pixels (temporal, ink, paper);
+				paint_pixels (temporal3, ink, paper, 8);
+				
 		}
+		}
+		
+		//Update pixel position
 		ordenador.currpix += 8;
 		if (ordenador.currpix > ordenador.pixancho) {
 			ordenador.currpix = 0;
@@ -596,7 +618,9 @@ inline void show_screen (int tstados) {
 			}
 		}
 		
-		if ((ordenador.currline > ordenador.pixalto)&&(ordenador.currpix>=64)) {
+	
+		//End of frame
+		if ((ordenador.currline > ordenador.pixalto)&&(ordenador.currpix>63)) { 
 			ordenador.currpix=64;
 			if (ordenador.osd_time) {
 				ordenador.osd_time--;
@@ -626,6 +650,7 @@ inline void show_screen (int tstados) {
 			curr_frames=0;
 			ordenador.currline = 0;
 			ordenador.interr = 1;
+			ordenador.readkeyboard = 1;
 			ordenador.cicles_counter=0;
 			ordenador.pixel = ((unsigned char *) (ordenador.screen->pixels))+ordenador.init_line;	// +ordenador.init_line;
 			ordenador.p_translt = ordenador.translate;
@@ -639,21 +664,236 @@ inline void show_screen (int tstados) {
 	}
 }
 
+//Write the screen from 14339 state
 
-/* PAINT_PIXELS paints one byte with INK color for 1 bits and PAPER color
+inline void show_screen_precision (int tstados) {
+
+	static unsigned char temporal, temporal2, temporal_1, temporal2_1,temporal3, ink, paper, fflash, tmp2;
+
+	ordenador.tstados_counter += tstados;
+	
+	if (curr_frames<jump_frames) { //Jump the frame drawing
+		if (ordenador.tstados_counter>=ordenador.tstatodos_frame) {
+			ordenador.tstados_counter-=ordenador.tstatodos_frame;
+			ordenador.interr = 1;
+			ordenador.readkeyboard = 1;
+			curr_frames++;
+		}
+		if (ordenador.tstados_counter > 31) ordenador.interr = 0;
+		return;
+	}
+	
+	while (ordenador.tstados_counter>0) {
+		ordenador.tstados_counter--; 
+		
+		//test if current pixel is outside visible area
+		
+		if ((ordenador.currline >= ordenador.first_line) && (ordenador.currline < ordenador.last_line)&&
+		(ordenador.currpix > 15) && (ordenador.currpix < 336))
+		{
+
+		
+		ordenador.pixels_word = ordenador.currpix%16;
+		ordenador.pixels_octect = ordenador.currpix%8;
+		
+		// test if current pixel is for border or for user area
+
+		if ((ordenador.currline < ordenador.upper_border_line ) || (ordenador.currline >= ordenador.lower_border_line)
+			|| (ordenador.currpix < 48) || (ordenador.currpix > 303)) {
+			
+			// is border
+			
+			if (ordenador.pixels_octect==0) ordenador.border_p = ordenador.border;  
+				
+			if (ordenador.ulaplus) {
+				paint_pixels (255, ordenador.border_p+24, 0, 2);	// paint 2 pixels with BORDER color
+			} else {
+				paint_pixels (255, ordenador.border_p, 0, 2);	// paint 2 pixels with BORDER color
+			}
+
+			ordenador.bus_value = 255;
+			
+			if ((ordenador.currline == ordenador.upper_border_line) && (ordenador.currpix == 46))
+			{
+			
+				temporal = ordenador.memoria[(*ordenador.p_translt2) + ordenador.video_offset];	// attributes
+				temporal2 = ordenador.memoria[(*ordenador.p_translt) + ordenador.video_offset];	// bitmap
+				temporal_1 = ordenador.memoria[(*(ordenador.p_translt2+1)) + ordenador.video_offset];	// attributes
+				temporal2_1 = ordenador.memoria[((*ordenador.p_translt+1)) + ordenador.video_offset];	// bitmap
+				
+				ordenador.p_translt+=2;
+				ordenador.p_translt2+=2;
+				ordenador.bus_value = temporal2;
+			}
+
+		} else {
+
+			// is user area. We search for ink and paper colours
+
+			switch (ordenador.pixels_word)
+			{
+			case 0: //start of first byte
+			
+				ink = temporal & 0x07;	// ink colour
+				paper = (temporal >> 3) & 0x07;	// paper colour
+				if (ordenador.ulaplus) {
+					tmp2=0x10+((temporal>>2)&0x30);
+					ink+=tmp2;
+					paper+=8+tmp2;
+				} else {
+					if (temporal & 0x40) {	// bright flag?
+						ink += 8;
+						paper += 8;
+						}
+					fflash = temporal & 0x80;	// flash flag
+					}
+
+				// Snow Effect
+
+				if(ordenador.screen_snow) {
+					temporal3 = ordenador.memoria[(((*ordenador.p_translt) + (ordenador.video_offset))&0xFFFFFF00)+(procesador.R)];	// data with snow
+					ordenador.screen_snow=0; // no more snow for now
+				} else
+					temporal3 = temporal2;	// bitmap
+				
+			break;
+			
+			
+			case 8: //start of second byte
+			
+				ink = temporal_1 & 0x07;	// ink colour
+				paper = (temporal_1 >> 3) & 0x07;	// paper colour
+				if (ordenador.ulaplus) {
+					tmp2=0x10+((temporal_1>>2)&0x30);
+					ink+=tmp2;
+					paper+=8+tmp2;
+				} else {
+					if (temporal_1 & 0x40) {	// bright flag?
+						ink += 8;
+						paper += 8;
+						}
+					fflash = temporal_1 & 0x80;	// flash flag
+					}
+
+					temporal3 = temporal2_1;	// bitmap
+			break;
+			
+			case 14: //sample the memory 
+			
+				temporal = ordenador.memoria[(*ordenador.p_translt2) + ordenador.video_offset];	// attributes
+				temporal2 = ordenador.memoria[(*ordenador.p_translt) + ordenador.video_offset];	// bitmap
+				temporal_1 = ordenador.memoria[(*(ordenador.p_translt2+1)) + ordenador.video_offset];	// attributes
+				temporal2_1 = ordenador.memoria[((*ordenador.p_translt+1)) + ordenador.video_offset];	// bitmap
+				
+				ordenador.p_translt+=2;
+				ordenador.p_translt2+=2;
+				
+			break;
+			}
+		
+			//Floating bus
+			if (ordenador.currpix < 295)
+			switch (ordenador.pixels_word)
+			{
+			case 14:
+				// bitmap
+				ordenador.bus_value = temporal2; 
+				break;
+			case 0:
+				// attributes
+				ordenador.bus_value = temporal; 
+				break;	
+			case 2:
+				// bitmap
+				ordenador.bus_value = temporal2_1;
+				break;
+			case 4:	
+				// attributes
+				ordenador.bus_value = temporal_1;
+				break;
+			default:
+				ordenador.bus_value = 255;
+				break;
+			}
+			
+			if ((fflash) && (ordenador.flash))
+				paint_pixels (temporal3, paper, ink, 2);	// if FLASH, invert PAPER and INK
+			else
+				paint_pixels (temporal3, ink, paper ,2);
+				
+		}
+		}
+		
+		//Update pixel position
+		ordenador.cicles_counter++;
+		ordenador.currpix += 2;
+		if (ordenador.currpix > ordenador.pixancho) {
+			ordenador.currpix = 0;
+			ordenador.currline++;
+			if (ordenador.currline > ordenador.first_line) {	// ordenador.first_line)
+				ordenador.pixel += ordenador.next_line;	// ordenador.next_line;
+			}
+		}
+	
+		//End of frame
+		if ((ordenador.currline > ordenador.pixalto)&&(ordenador.currpix>ordenador.start_screen)){  
+			if (ordenador.osd_time) {
+				ordenador.osd_time--;
+				if (ordenador.osd_time==0) {
+					ordenador.tab_extended=0;
+					ordenador.esc_again=0;
+				}
+					
+				if (ordenador.osd_time)
+					print_string (ordenador.screenbuffer,ordenador.osd_text, -1,450, 12, 0,ordenador.screen_width);
+				else {
+					if (ordenador.zaurus_mini==0)
+						print_string (ordenador.screenbuffer,"                                      ",-1, 450, 12, 0,ordenador.screen_width);
+					else
+						print_string (ordenador.screenbuffer,"                            ",-1, 450, 12, 0,ordenador.screen_width);
+				}
+			}
+				
+			if (ordenador.mustlock) {
+				SDL_UnlockSurface (ordenador.screen);
+				SDL_Flip (ordenador.screen);
+				SDL_LockSurface (ordenador.screen);
+			} else {
+				SDL_Flip (ordenador.screen);
+			}
+			
+			curr_frames=0;
+			ordenador.currline = 0;
+			ordenador.interr = 1;
+			ordenador.readkeyboard = 1;
+			ordenador.cicles_counter=0;
+			ordenador.pixel = ((unsigned char *) (ordenador.screen->pixels))+ordenador.init_line;	// +ordenador.init_line;
+			ordenador.p_translt = ordenador.translate;
+			ordenador.p_translt2 = ordenador.translate2;
+			ordenador.contador_flash++;
+			if (ordenador.contador_flash == 16) {
+				ordenador.flash = 1 - ordenador.flash;
+				ordenador.contador_flash = 0;
+			}
+		}
+		
+		//End of interrupt
+		if (ordenador.cicles_counter == 32) ordenador.interr = 0;
+		
+	}
+}
+
+/* PAINT_PIXELS paints bits with INK color for 1 bits and PAPER color
 for 0 bits, and increment acordingly the pointer PIXEL */
 
-inline void paint_pixels (unsigned char octet,unsigned char ink, unsigned char paper) {
+inline void paint_pixels (unsigned char octet,unsigned char ink, unsigned char paper, unsigned char bit) {
 
 	static int bucle,valor,*p;
 	static unsigned char mask;
 	
-	if ((ordenador.currpix < 16) || (ordenador.currpix >= 336)
+	if (ordenador.pixels_octect==0 ||bit == 8) mask = 0x80;
-	    || (ordenador.currline < 40) || (ordenador.currline >= 280))
-		return;
 	 
-	mask = 0x80;
+	for (bucle = 0; bucle < bit; bucle++) {
-	for (bucle = 0; bucle < 8; bucle++) {
 		valor = (octet & mask) ? (int) ink : (int) paper;
 		p=(colors+valor);
 		
@@ -1133,6 +1373,11 @@ void ResetComputer () {
 	ordenador.updown=0;
 	ordenador.leftright=0;
 	
+	ordenador.wr=0;
+	ordenador.r_fetch = 0;
+	ordenador.io = 0;
+	ordenador.contention = 0;
+
 	ordenador.ulaplus=0;
 
 	ordenador.mport1 = 0;
@@ -1141,8 +1386,31 @@ void ResetComputer () {
 	switch (ordenador.mode128k) {	
 	case 0:		// 48K
 		ordenador.pixancho = 447;
+		ordenador.start_screen=41;
+		if (ordenador.videosystem==0)
+		{
 		ordenador.pixalto = 311;
-
+		ordenador.upper_border_line = 64;
+		ordenador.lower_border_line = 64 + 192;
+		ordenador.cpufreq = 3500000;
+		ordenador.tstatodos_frame= 69888;
+		ordenador.start_contention = 14335;
+		ordenador.end_contention = 14335+224*192;
+		ordenador.first_line = 40;
+		ordenador.last_line = 280;
+		}
+		else
+		{
+		ordenador.pixalto = 263;
+		ordenador.upper_border_line = 40;
+		ordenador.lower_border_line = 40 + 192;
+		ordenador.cpufreq = 3527500;
+		ordenador.tstatodos_frame= 59136;
+		ordenador.start_contention = 8959;
+		ordenador.end_contention = 8959+224*192;
+		ordenador.first_line = 16;
+		ordenador.last_line = 256;
+		}
 		ordenador.block0 = ordenador.memoria;
 		ordenador.block1 = ordenador.memoria + 131072;	// video mem. in page 9 (page 5 in 128K)
 		ordenador.block2 = ordenador.memoria + 65536;	// 2nd block in page 6 (page 2 in 128K)
@@ -1151,13 +1419,22 @@ void ResetComputer () {
 	break;
 	
 	case 3:		// +2A/+3
-		Z80free_Out (0x1FFD, 0);
+		Z80free_Out_fake (0x1FFD, 0);
 	case 1:		// 128K
 	case 2:		// +2
 	case 4:		// spanish 128K
-		Z80free_Out (0x7FFD, 0);
+		Z80free_Out_fake (0x7FFD, 0);
 		ordenador.pixancho = 455;
 		ordenador.pixalto = 310;
+		ordenador.upper_border_line = 63;
+		ordenador.lower_border_line = 63 + 192;
+		ordenador.cpufreq = 3546900;
+		ordenador.tstatodos_frame= 70908;
+		ordenador.start_contention = 14361;
+		ordenador.end_contention = 14361+228*192;
+		ordenador.first_line = 40;
+		ordenador.last_line = 280;
+		ordenador.start_screen=45;
 	break;
 	}
 	
@@ -1168,26 +1445,66 @@ void ResetComputer () {
 
 void do_contention() {
 
-	if (!ordenador.contended_zone)
+	static int ccicles;
-		return;
 	
-	if (ordenador.cicles_counter<14335) {
+	if ((ordenador.currline < ordenador.upper_border_line ) || (ordenador.currline >= ordenador.lower_border_line)
-		return;
+			|| (ordenador.currpix < 40) || (ordenador.currpix > 295)) return;
+	
+	if (ordenador.mode128k==3) //+3
+		{
+		ccicles=((ordenador.currpix-28)/2)%8; //44-16
+		if (ccicles>6) return;
+		ordenador.contention+=7-ccicles;
+		emulate_screen(7-ccicles);
 		}
-
+	else //64k/128k/+2
-	int ccicles=(ordenador.cicles_counter-14335)%8;
+		{
-
+		ccicles=((ordenador.currpix-40)/2)%8;
-	if (ccicles>5) {
+		if (ccicles>5) return;
-		return;
+		ordenador.contention+=6-ccicles;
+		emulate_screen(6-ccicles);
 		}
 	
-	emulate(6-ccicles);
-
 }
 
+
 void Z80free_Wr (register word Addr, register byte Value) {
 	
+	ordenador.wr+=3;
 	switch (Addr & 0xC000) {
+	case 0x0000:
+	// only writes in the first 16K if we are in +3 mode and bit0 of mport2 is 1
+		if (ordenador.precision) emulate_screen(3);
+		if ((ordenador.mode128k == 3) && (1 == (ordenador.mport2 & 0x01)))
+			*(ordenador.block0 + Addr) = (unsigned char) Value;
+	break;
+
+	case 0x4000:
+		do_contention();
+		if (ordenador.precision) emulate_screen(3); 
+		*(ordenador.block1 + Addr) = (unsigned char) Value;
+	break;
+	
+	case 0x8000:
+		if (ordenador.precision) emulate_screen(3); 
+		*(ordenador.block2 + Addr) = (unsigned char) Value;
+	break;
+	
+	case 0xC000:
+		if (ordenador.precision) {
+		if (((ordenador.mode128k==1)||(ordenador.mode128k==2)||(ordenador.mode128k==4))&&(ordenador.mport1 & 0x01)) do_contention();
+		emulate_screen(3); 
+		}
+		*(ordenador.block3 + Addr) = (unsigned char) Value;
+	break;
+	}
+	
+}
+
+void Z80free_Wr_fake (register word Addr, register byte Value) {
+	
+	switch (Addr & 0xC000) {
+	
 	case 0x0000:
 	// only writes in the first 16K if we are in +3 mode and bit0 of mport2 is 1
 
@@ -1196,7 +1513,6 @@ void Z80free_Wr (register word Addr, register byte Value) {
 	break;
 
 	case 0x4000:
-		do_contention();
 		*(ordenador.block1 + Addr) = (unsigned char) Value;
 	break;
 	
@@ -1210,6 +1526,53 @@ void Z80free_Wr (register word Addr, register byte Value) {
 	}
 }
 
+byte Z80free_Rd_fetch (register word Addr) {
+
+	if((ordenador.mdr_active)&&(ordenador.mdr_paged)&&(Addr<8192)) // Interface I
+		return((byte)ordenador.shadowrom[Addr]);
+	
+	switch (ordenador.other_ret) {
+	case 1:
+		ordenador.other_ret = 0;
+		return (201);	// RET instruction
+	break;
+
+	default:
+	ordenador.r_fetch+=4;	
+		switch (Addr & 0xC000) {
+		case 0x0000:
+			if (ordenador.precision) emulate_screen (4);
+			return ((byte) (*(ordenador.block0 + Addr)));
+		break;
+
+		case 0x4000:
+			do_contention();
+			if (ordenador.precision) emulate_screen (4);
+			return ((byte) (*(ordenador.block1 + Addr)));
+		break;
+
+		case 0x8000:
+			if (ordenador.precision) emulate_screen (4);
+			return ((byte) (*(ordenador.block2 + Addr)));
+		break;
+
+		case 0xC000:
+			if (ordenador.precision) {
+			if (((ordenador.mode128k==1)||(ordenador.mode128k==2)||(ordenador.mode128k==4))&&(ordenador.mport1 & 0x01)) do_contention();
+			emulate_screen (4);
+			}
+			return ((byte) (*(ordenador.block3 + Addr)));
+		break;
+
+		default:
+			printf ("Memory error\n");
+			exit (1);
+			return 0;
+		}
+		
+		break;
+	}
+}
 
 byte Z80free_Rd (register word Addr) {
 	
@@ -1223,21 +1586,29 @@ byte Z80free_Rd (register word Addr) {
 	break;
 
 	default:
+		ordenador.wr+=3;
 		switch (Addr & 0xC000) {
 		case 0x0000:
+			if (ordenador.precision) emulate_screen (3);
 			return ((byte) (*(ordenador.block0 + Addr)));
 		break;
 
 		case 0x4000:
 			do_contention();
+			if (ordenador.precision) emulate_screen (3);
 			return ((byte) (*(ordenador.block1 + Addr)));
 		break;
 
 		case 0x8000:
+			if (ordenador.precision) emulate_screen (3);
 			return ((byte) (*(ordenador.block2 + Addr)));
 		break;
 
 		case 0xC000:
+			if (ordenador.precision) {
+			if (((ordenador.mode128k==1)||(ordenador.mode128k==2)||(ordenador.mode128k==4))&&(ordenador.mport1 & 0x01)) do_contention();
+			emulate_screen (3);
+			}
 			return ((byte) (*(ordenador.block3 + Addr)));
 		break;
 
@@ -1275,22 +1646,47 @@ void set_palete_entry(unsigned char entry, byte Value) {
 
 void Z80free_Out (register word Port, register byte Value) {
 
-	// Microdrive access
-	
 	register word maskport;
 	
-	if (((Port&0x0001)==0)||((Port>=0x4000)&&(Port<0x8000))) {
+	//It should out after 3 states
-		do_contention();
+	
+	if (ordenador.precision)
+	{
+		switch (ordenador.mode128k)
+		{
+		case 0:
+		if ((Port & 0xC000) == 0x4000) // (Port>=0x4000)&&(Port<0x8000)
+			{if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {do_contention();emulate_screen(1);do_contention();ordenador.io+=1;} 
+			else {do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();ordenador.io+=3;}
 			}
+		else
+			if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {emulate_screen(1);do_contention();ordenador.io+=1;}
+		break;
+		case 1:
+		case 2:
+		case 4:
+		if (((Port & 0xC000) == 0x4000)||((ordenador.mport1 & 0x01)&&((Port & 0xC000) == 0xC000))) // (Port>=0xc000)&&(Port<=0xffff)
+			{if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {do_contention();emulate_screen(1);do_contention();ordenador.io+=1;} 
+			else {do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();ordenador.io+=3;}
+			}
+		else
+			if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {emulate_screen(1);do_contention();ordenador.io+=1;}		
+		break;
+		case 3:
+		break; //no io contention in +3
+		default:
+		break;
+		}
+	}
+	else if ((Port&0x0001)==0) do_contention();	
+
 	
 	// ULAPlus
 	if (Port == 0xBF3B) {
-		do_contention();
 		ordenador.ulaplus_reg = Value;
 		return;
 	}
 	if (Port == 0xFF3B) {
-		do_contention();
 		if (ordenador.ulaplus_reg==0x40) { // mode
 			ordenador.ulaplus=Value&0x01;
 			return;
@@ -1301,6 +1697,8 @@ void Z80free_Out (register word Port, register byte Value) {
 		}
 	}
 	
+	// Microdrive access
+
 	if(((Port &0x0018)!=0x0018)&&(ordenador.mdr_active))
 		microdrive_out(Port,Value);
 	
@@ -1321,9 +1719,9 @@ void Z80free_Out (register word Port, register byte Value) {
 	// Memory page (7FFD & 1FFD)
 
 	if (ordenador.mode128k==3) {
-		maskport=0x0FFD;
-	} else {
 		maskport=0x3FFD;
+	} else {
+		maskport=0x7FFD;
 	}
 	
 	if (((Port|maskport) == 0x7FFD) && (0 == (ordenador.mport1 & 0x20))) {
@@ -1331,37 +1729,104 @@ void Z80free_Out (register word Port, register byte Value) {
 		set_memory_pointers ();	// set the pointers
 	}
 
-	if (((Port|maskport) == 0x1FFD) && (0 == (ordenador.mport1 & 0x20))) {
+	if (((Port|0x0FFD) == 0x1FFD) && (0 == (ordenador.mport1 & 0x20))) {
 		ordenador.mport2 = (unsigned char) Value;
 		set_memory_pointers ();	// set the pointers
 	}
 
 	// Sound chip (AY-3-8912)
 
-	if (((Port|maskport) == 0xFFFD)&&(ordenador.ay_emul))
+	if (((Port|0x3FFD) == 0xFFFD)&&(ordenador.ay_emul)) // bit1, 14 ,15 according to the manual
 		ordenador.ay_latch = ((unsigned int) (Value & 0x0F));
 
-	if (((Port|maskport) == 0xBFFD)&&(ordenador.ay_emul)) {
+	if (((Port|0x3FFD) == 0xBFFD)&&(ordenador.ay_emul)) { //bit1, 14 ,15 according to the manual
 		ordenador.ay_registers[ordenador.ay_latch] = (unsigned char) Value;
 		if (ordenador.ay_latch == 13) //Envelope shape
 			ordenador.ay_envel_way = 2;	// start cycle
 	}
 }
 
+void Z80free_Out_fake (register word Port, register byte Value) {
+	
+	register word maskport;
+	
+	// ULA port (A0 low)
+
+	if (!(Port & 0x0001)) {
+		ordenador.port254 = (unsigned char) Value;
+		ordenador.border = (((unsigned char) Value) & 0x07);
+
+		if (ordenador.pause) {
+			if (Value & 0x10)
+				ordenador.sound_bit = 1;
+			else
+				ordenador.sound_bit = 0;	// assign to SOUND_BIT the value
+		}
+	}
+
+	// Memory page (7FFD & 1FFD)
+
+	if (ordenador.mode128k==3) {
+		maskport=0x3FFD;
+	} else {
+		maskport=0x7FFD;
+	}
+	
+	if (((Port|maskport) == 0x7FFD) && (0 == (ordenador.mport1 & 0x20))) {
+		ordenador.mport1 = (unsigned char) Value;
+		set_memory_pointers ();	// set the pointers
+	}
+
+	if (((Port|0x0FFD) == 0x1FFD) && (0 == (ordenador.mport1 & 0x20))) {
+		ordenador.mport2 = (unsigned char) Value;
+		set_memory_pointers ();	// set the pointers
+	}
+}
 
 byte Z80free_In (register word Port) {
 
 	static unsigned int temporal_io;
-	byte pines;
+	static byte pines;
 	
-	if (((Port&0x0001)==0)||((Port>=0x4000)&&(Port<0x8000))) {
+	
-		do_contention();
+	if (ordenador.precision)
+	{
+		ordenador.io+=4;
+		switch (ordenador.mode128k)
+		{
+		case 0:
+		if ((Port & 0xC000) == 0x4000) // (Port>=0x4000)&&(Port<0x8000)
+			{if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {do_contention();emulate_screen(1);do_contention();emulate_screen(3);} 
+			else {do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();emulate_screen(1);}
 			}
+		else
+			if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {emulate_screen(1);do_contention();emulate_screen(3);}
+			else emulate_screen(4);
+		break;
+		case 1:
+		case 2:
+		case 4:
+		if (((Port & 0xC000) == 0x4000)||((ordenador.mport1 & 0x01)&&((Port & 0xC000) == 0xC000))) // (Port>=0xc000)&&(Port<=0xffff)
+			{if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {do_contention();emulate_screen(1);do_contention();emulate_screen(3);} 
+			else {do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();emulate_screen(1);do_contention();emulate_screen(1);}
+			}
+		else
+			if ((Port&0x0001)==0 ||(Port == 0xBF3B)||(Port == 0xFF3B)) {emulate_screen(1);do_contention();emulate_screen(3);}
+			else emulate_screen(4);
+		break;
+		case 3:
+		emulate_screen(4);//no io contention in +3
+		break; 
+		default:
+		emulate_screen(4);
+		break;
+		}
+	}
+	else if ((Port&0x0001)==0) do_contention();	
 		
 	temporal_io = (unsigned int) Port;
 	
 	if (Port == 0xFF3B) {
-		do_contention();
 		if (ordenador.ulaplus_reg==0x40) { // mode
 			return(ordenador.ulaplus&0x01);
 		}
@@ -1415,7 +1880,10 @@ byte Z80free_In (register word Port) {
 		}
 	}
 
-	if ((temporal_io == 0xFFFD)&&(ordenador.ay_emul))
+	if ((temporal_io == 0xFFFD)&&(ordenador.ay_emul)) //any mask to apply?
+		return (ordenador.ay_registers[ordenador.ay_latch]);
+		
+	if ((temporal_io == 0xBFFD)&&(ordenador.ay_emul)&&(ordenador.mode128k==3)) //any mask to apply?
 		return (ordenador.ay_registers[ordenador.ay_latch]);
 
 	// Microdrive access
@@ -1425,6 +1893,11 @@ byte Z80free_In (register word Port) {
 	
 	pines=bus_empty();
 	
+	if (ordenador.precision && (ordenador.mode128k==1||ordenador.mode128k==2||(ordenador.mode128k==4)))
+	 {	if (temporal_io == 0x7FFD) Z80free_Out_fake (0x7FFD,pines); //writeback 0X7ffd 
+		if (temporal_io == 0x3FFD) Z80free_Out_fake (0x3FFD,pines); //writeback 0X3ffd
+	 }
+	
 	return (pines);
 }
 
@@ -1475,3 +1948,46 @@ void set_volume (unsigned char volume) {
 		break;
 	}
 }
+
+void restart_video()
+{
+ int dblbuffer=1,hwsurface=1;
+ char old_border;
+ 
+clean_screen();
+
+if (ordenador.mustlock) {
+				SDL_UnlockSurface (ordenador.screen);
+				SDL_Flip (ordenador.screen);
+				SDL_LockSurface (ordenador.screen);
+			} else {
+				SDL_Flip (ordenador.screen);
+			}
+			
+
+switch(ordenador.zaurus_mini) {
+	case 0:
+		init_screen(640,480,0,0,dblbuffer,hwsurface);
+	break;
+	case 1:
+	case 2:
+		init_screen(480,640,0,0,dblbuffer,hwsurface);
+	break;
+	case 3:
+		init_screen(320,240,0,0,dblbuffer,hwsurface);
+	break;
+	}
+	
+	old_border = ordenador.border;
+	register_screen(screen);
+	ordenador.border = old_border;
+
+	ordenador.screenbuffer=ordenador.screen->pixels;
+	ordenador.screen_width=ordenador.screen->w;
+	
+	//Init SDL Menu
+	
+	menu_init(ordenador.screen);
+
+	clean_screen();
+}

src/computer.h

@@ -36,6 +36,7 @@ int countdown;
 
 struct computer {
 
+	unsigned char precision; //If set 1 emulate with more precision
 	unsigned int temporal_io;
 
 	// screen private global variables
@@ -52,7 +53,7 @@ struct computer {
 
 	unsigned int *p_translt,*p_translt2;
 	unsigned char *pixel; // current address
-	char border,flash;
+	char border,flash, border_p;
 	int currline,currpix;
 
 	int tstados_counter; // counts tstates leaved to the next call
@@ -67,8 +68,18 @@ struct computer {
 	int next_pixel; // next pixel
 	int pixancho,pixalto; // maximum pixel value for width and height
 	int jump_pixel;
+	int upper_border_line; //63 or 62 for 48k or 128k
+	int lower_border_line; //upper_border_line + 192
+	int start_screen; //Pixel at which the interrupt is generated
+	int cpufreq; //frequency CPU
+	int tstatodos_frame; //number of tstados per frame
+	int pixels_octect; //2 bits in the octect
+	int pixels_word; //2 bits in the word
+	int start_contention; //start tstados for contention
+	int end_contention; //end tstados for contention
+	
 	unsigned char screen_snow; // 0-> no emulate snow; 1-> emulate snow
-	unsigned char contended_zone; // 0-> no contention; 1-> contention possible
+	//unsigned char contended_zone; // 0-> no contention; 1-> contention possible
 	int cicles_counter; // counts how many pixel clock cicles passed since las interrupt
 
 	char ulaplus; // 0 = inactive; 1 = active
@@ -121,13 +132,18 @@ struct computer {
 	signed char ay_envel_value;
 	unsigned char ay_envel_way;
 	unsigned char sound_current_value;
+	unsigned int wr;
+	unsigned int r_fetch;
+	unsigned int io;
+	unsigned int contention;
 
 	// bus global variables
 
 	unsigned char bus_counter;
 	unsigned char bus_value;
 	unsigned char issue; // 2= 48K issue 2, 3= 48K issue 3
-	unsigned char mode128k; // 0=48K, 1=128K, 2=+2, 3=+3
+	unsigned char mode128k; // 0=48K, 1=128K, 2=+2, 3=+3 4=sp
+	unsigned char videosystem; //0=PAL, 1=NTSC
 	unsigned char joystick[2]; // 0=cursor, 1=kempston, 2=sinclair1, 3=sinclair2
 	unsigned char port254;
 
@@ -193,6 +209,7 @@ struct computer {
 	unsigned char memoria[196608]; // memory (12 pages of 16K each one). 4 for ROM, and 8 for RAM
 	unsigned char shadowrom[8192]; // space for Interface I's ROMs
 	unsigned char interr;
+	unsigned char readkeyboard;
 	unsigned char mustlock;
 	unsigned char other_ret; // 0=no change; 1=memory returns RET (201)
 
@@ -219,11 +236,13 @@ struct computer {
 void computer_init();
 void register_screen(SDL_Surface *);
 inline void show_screen(int);
-inline void paint_pixels(unsigned char, unsigned char, unsigned char);
+inline void show_screen_precision(int);
+inline void paint_pixels(unsigned char, unsigned char, unsigned char, unsigned char);
 inline void read_keyboard();
 void fill_audio(void *udata,Uint8 *,int);
 void set_volume(unsigned char);
 inline void play_sound(unsigned int);
+inline void emulate_screen(int);
 inline void emulate(int);
 void ResetComputer();
 inline byte bus_empty();
@@ -232,5 +251,6 @@ inline void play_ay();
 inline void paint_one_pixel(unsigned char *colour,unsigned char *address);
 void computer_set_palete();
 void set_palete_entry(unsigned char entry, byte Value);
+void restart_video();
 
 #endif

src/emulator.c

@@ -77,6 +77,10 @@ bool usbismount = false;
 bool networkisinit = false;
 bool smbismount = false; 
 
+extern int FULL_DISPLAY_X; //640
+extern int FULL_DISPLAY_Y; //480
+extern int RATIO; 
+
 #if defined(GEKKO)
 
 /****************************************************************************
@@ -347,12 +351,11 @@ void load_rom(char type) {
 	size=fread(ordenador.shadowrom,8192,1,fichero);
   	fclose(fichero);
 }
+void init_sdl()
+{
+int retorno, bucle; 
 
-void init_screen(int resx,int resy,int depth,int fullscreen,int dblbuffer,int hwsurface) {
+//if (sound_type!=3)
-
-	int retorno,bucle,bucle2,valores,ret2;
-
-	//if (sound_type!=3)
 	retorno=SDL_Init(SDL_INIT_VIDEO);
 	/*else
 		retorno=SDL_Init(SDL_INIT_VIDEO|SDL_INIT_AUDIO);*/
@@ -380,6 +383,11 @@ void init_screen(int resx,int resy,int depth,int fullscreen,int dblbuffer,int hw
   			}
   		}
 	}
+}
+
+void init_screen(int resx,int resy,int depth,int fullscreen,int dblbuffer,int hwsurface) {
+
+	int valores;
 
 	// screen initialization
 	valores=SDL_HWPALETTE|SDL_ANYFORMAT;
@@ -410,7 +418,18 @@ void init_screen(int resx,int resy,int depth,int fullscreen,int dblbuffer,int hw
 
 	printf("Locking screen: %d\n", ordenador.mustlock);
 
-	// sound initialization
+	
+	printf("Return screen init\n");
+	
+	FULL_DISPLAY_X = resx;
+	FULL_DISPLAY_Y = resy;
+	RATIO = 640/FULL_DISPLAY_X;
+}
+
+void init_sound()
+{
+int bucle, bucle2,ret2;
+// sound initialization
 
 	if (sound_type==SOUND_AUTOMATIC) {
 		ret2=sound_init(1); // check all sound systems
@@ -439,10 +458,9 @@ void init_screen(int resx,int resy,int depth,int fullscreen,int dblbuffer,int hw
 	}
 
 	printf("Init sound 2\n");
-	ordenador.tst_sample=3500000/ordenador.freq;
+	ordenador.tst_sample=ordenador.cpufreq/ordenador.freq;
 	//printf("Set volume\n");
 	//set_volume(70);
-	printf("Return init\n");
 }
 
 void end_system() {
@@ -506,11 +524,16 @@ int save_config(struct computer *object, char *filename) {
 	
 	fprintf(fconfig,"mode=%c%c",48+object->mode128k,10);
 	fprintf(fconfig,"issue=%c%c",48+object->issue,10);
+	fprintf(fconfig,"ntsc=%c%c",48+object->videosystem,10);
 	fprintf(fconfig,"joystick1=%c%c",48+object->joystick[0],10);
 	fprintf(fconfig,"joystick2=%c%c",48+object->joystick[1],10);
 	fprintf(fconfig,"ay_sound=%c%c",48+object->ay_emul,10);
 	fprintf(fconfig,"interface1=%c%c",48+object->mdr_active,10);
 	fprintf(fconfig,"doublescan=%c%c",48+object->dblscan,10);
+	fprintf(fconfig,"framerate=%c%c",48+jump_frames,10);
+	fprintf(fconfig,"screen=%c%c",48+object->zaurus_mini,10);
+	fprintf(fconfig,"text=%c%c",48+object->text_mini,10);
+	fprintf(fconfig,"precision=%c%c",48+object->precision,10);
 	fprintf(fconfig,"volume=%c%c",65+(object->volume),10);
 	fprintf(fconfig,"bw=%c%c",48+object->bw,10);
 	fprintf(fconfig,"tap_fast=%c%c",48+object->tape_fast_load,10);
@@ -639,8 +662,9 @@ int load_config(struct computer *object, char *filename) {
 	char line[1024],carac,done;
 	int pos, key_sdl=0;
 	FILE *fconfig;
-	unsigned char volume=255,mode128k=255,issue=255,joystick1=255,joystick2=255,ay_emul=255,mdr_active=255,
+	unsigned char volume=255,mode128k=255,issue=255,ntsc=255, joystick1=255,joystick2=255,ay_emul=255,mdr_active=255,
-	dblscan=255,bw=255, tap_fast=255, joypad1=255, joypad2=255, rumble1=255, rumble2=255, joy_n=255, key_n=255, port=255, autoconf=255;
+	dblscan=255,framerate =255, screen =255, text=255, precision=255, bw=255, tap_fast=255,
+	joypad1=255, joypad2=255, rumble1=255, rumble2=255, joy_n=255, key_n=255, port=255, autoconf=255;
 	
 	if (filename) strcpy(config_path,filename); 
 	else return -2;
@@ -682,6 +706,10 @@ int load_config(struct computer *object, char *filename) {
 			issue=line[6]-'0';
 			continue;
 		}
+		if (!strncmp(line,"ntsc=",5)) {
+			ntsc=line[5]-'0';
+			continue;
+		}
 		if (!strncmp(line,"joystick1=",10)) {
 			joystick1=line[10]-'0';
 			continue;
@@ -698,10 +726,26 @@ int load_config(struct computer *object, char *filename) {
 			mdr_active=line[11]-'0';
 			continue;
 		}
+		if (!strncmp(line,"screen=",7)) {
+			screen=line[7]-'0';
+			continue;
+		}
+		if (!strncmp(line,"text=",5)) {
+			text=line[5]-'0';
+			continue;
+		}
 		if (!strncmp(line,"doublescan=",11)) {
 			dblscan=line[11]-'0';
 			continue;
 		}
+		if (!strncmp(line,"framerate=",10)) {
+			framerate=line[10]-'0';
+			continue;
+		}
+		if (!strncmp(line,"precision=",10)) {
+			precision=line[10]-'0';
+			continue;
+		}
 		if (!strncmp(line,"volume=",7)) {
 			volume=(line[7]-'A');
 			continue;
@@ -752,6 +796,9 @@ int load_config(struct computer *object, char *filename) {
 	if (issue<4) {
 		object->issue=issue;
 	}
+	if (issue<2) {
+		object->videosystem=ntsc;
+	}
 	if (joystick1<4) {
 		object->joystick[0]=joystick1;
 	}
@@ -767,6 +814,18 @@ int load_config(struct computer *object, char *filename) {
 	if (dblscan<2) {
 		object->dblscan=dblscan;
 	}
+	if (framerate<6) {
+		jump_frames=framerate;
+	}
+	if (screen<4) {
+		object->zaurus_mini=screen;
+	}
+	if (text<2) {
+		object->text_mini=text;
+	}
+	if (precision<2) {
+		object->precision=precision;
+	}
 	if (bw<2) {
 		object->bw=bw;
 	}
@@ -802,7 +861,7 @@ int load_config(struct computer *object, char *filename) {
 
 int main(int argc,char *argv[]) {
 
-	int bucle,tstados,argumento,fullscreen,dblbuffer,hwsurface,length;
+	int bucle,tstados,tstados_screen, argumento,fullscreen,dblbuffer,hwsurface,length;
 	char gamefile[4096],config_path[1024] ;
 	
 	word PC=0;
@@ -965,6 +1024,9 @@ int main(int argc,char *argv[]) {
 	}
 	
 	atexit(end_system);
+	
+	init_sdl();
+	
 	switch(ordenador.zaurus_mini) {
 	case 0:
 		init_screen(640,480,0,0,dblbuffer,hwsurface);
@@ -977,6 +1039,9 @@ int main(int argc,char *argv[]) {
 		init_screen(320,240,0,0,dblbuffer,hwsurface);
 	break;
 	}
+	
+	init_sound();
+	
 	printf("Modo: %d\n",ordenador.mode128k);
 	register_screen(screen);
 	printf("Screen registered\n");
@@ -988,16 +1053,18 @@ int main(int argc,char *argv[]) {
 	SDL_WM_SetCaption("FBZX","");
 	#endif
 	ordenador.interr=0;
+	ordenador.readkeyboard = 0;
 
 	ordenador.screenbuffer=ordenador.screen->pixels;
 	ordenador.screen_width=ordenador.screen->w;
 	
 	//Init SDL Menu
 	
+	font_init();
 	menu_init(ordenador.screen);
 	
 	//Load the splash screen
-	if (load_zxspectrum_picture()) SDL_FreeSurface (image);
+	if (ordenador.zaurus_mini==0) if (load_zxspectrum_picture()) SDL_FreeSurface (image);
 	
 	#ifdef GEKKO
 	usbismount = InitUSB();
@@ -1098,11 +1165,24 @@ int main(int argc,char *argv[]) {
 
 		do {
 			tstados=Z80free_ustep(&procesador);
-			if(tstados<0) {
+			
-				printf("Error %X\n",procesador.PC);
+		if (ordenador.precision)
-				exit(1);
+			{
+			tstados_screen=tstados-ordenador.r_fetch -ordenador.wr -ordenador.io;
+			if(tstados_screen>0) emulate_screen(tstados_screen);
+			ordenador.wr=0;
+			ordenador.r_fetch=0;
+			ordenador.io=0;
+			emulate(tstados+ordenador.contention); // execute the whole hardware emulation for that number of TSTATES
+			ordenador.contention=0;
 			}
-			emulate(tstados); // execute the whole hardware emulation for that number of TSTATES
+		else
+			if (tstados>0) {
+			emulate_screen(tstados);
+			emulate(tstados+ordenador.contention);
+			ordenador.contention=0;
+			}
+		
 		} while(procesador.Status!=Z80XX);
 			
 		PC=procesador.PC;
@@ -1149,10 +1229,14 @@ int main(int argc,char *argv[]) {
 		if((PC==0x0700)&&(ordenador.mdr_active))
 			ordenador.mdr_paged = 2;
 
-		if(ordenador.interr==1) {
+		if(ordenador.readkeyboard==1) {
 			read_keyboard ();	// read the physical keyboard
+			ordenador.readkeyboard = 0;
+		}
+		
+		if(ordenador.interr==1) {
 			Z80free_INT(&procesador,bus_empty());
-			ordenador.interr=0;
+			if (ordenador.precision==0) ordenador.interr=0;
 		}
 	}
 	

src/emulator.h

@@ -47,5 +47,8 @@ int load_config(struct computer *object, char *filename);
 int save_config(struct computer *object, char *filename);
 int save_config_game(struct computer *object, char *filename, int overwrite);
 FILE *myfopen(char *filename,char *mode);
+void init_sdl();
+void init_sound();
+void init_screen(int resx,int resy,int depth,int fullscreen,int dblbuffer,int hwsurface);
 
 #endif

src/gui_sdl.c

@@ -31,7 +31,7 @@
 #include "emulator.h"
 #include "VirtualKeyboard.h"
 #include "tape.h"
-//#include "menus.h"
+#include "menus.h"
 #include "emulator.h"
 #include "cargador.h"
 
@@ -62,33 +62,46 @@ static const char *main_menu_messages[] = {
 		/*05*/		"Wiimote configuration",
 		/*06*/		"^|Wiimote1|Wiimote2",
 		/*07*/		"Emulation settings",
-		/*08*/		"Confs files",
+		/*08*/		"Screen settings",
-		/*09*/		"Microdrive",
+		/*09*/		"Confs files",
-		/*10*/		"Tools",
+		/*10*/		"Microdrive",
-		/*11*/		"Reset",
+		/*11*/		"Tools",
-		/*12*/		"Help",
+		/*12*/		"Reset",
-		/*13*/		"Quit",
+		/*13*/		"Help",
+		/*14*/		"Quit",
 		NULL
 };
 
 static const char *emulation_messages[] = {
 		/*00*/		"Emulated machine",
-		/*01*/		"^|48k_2|48K_3|128k|+2|+2A/+3|128K_Sp",
+		/*01*/		"^|48k_2|48K_3|128k|+2|+2A/+3|128K_Sp|NTSC",
 		/*02*/		"Volume",
 		/*03*/		"^|0|1|2|3|4|5|6|7|max",
-		/*04*/		"Tap fast speed",
+		/*04*/		"Frame rate",
-		/*05*/		"^|on|off",
+		/*05*/		"^|100%|50%|33%|25%|20%",
-		/*06*/		"Turbo mode",
+		/*06*/		"Tap fast speed",
-		/*07*/		"^|off|speed|ultraspeed",
+		/*07*/		"^|on|off",
-		/*08*/		"Double scan",
+		/*08*/		"Turbo mode",
-		/*09*/		"^|on|off",
+		/*09*/		"^|off|speed|ultraspeed",
-		/*10*/		"TV mode",
+		/*10*/		"Precision",
-		/*11*/		"^|Color|B&W",
+		/*11*/		"^|on|off",
 		/*12*/		"AY-3-8912 Emulation",
 		/*13*/		"^|on|off",		
 		NULL
 };
 
+static const char *screen_messages[] = {
+		/*00*/		"Double scan",
+		/*01*/		"^|on|off",
+		/*02*/		"  ",
+		/*03*/		"TV mode",
+		/*04*/		"^|Color|B&W",
+		/*05*/		"  ",
+		/*06*/		"Resolution",
+		/*07*/		"^|640X480|320X240",		
+		NULL
+};
+
 static const  char *input_messages[] = {
 		/*00*/		"Joystick type",
 		/*01*/		"^|Cursor|Kempston|Sinclair1|Sinclair2",
@@ -264,7 +277,7 @@ static void delete_tape()
 	
 	if ((ext_matches(filename, ".tap")|ext_matches(filename, ".TAP")|ext_matches(filename, ".tzx")|
 	ext_matches(filename, ".TZX"))
-	&& (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138, FULL_DISPLAY_Y /2-48))) unlink(filename);
+	&& (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138/RATIO, FULL_DISPLAY_Y /2-48/RATIO))) unlink(filename);
 	
 	free((void *)filename);
 }
@@ -323,7 +336,9 @@ static void manage_tape(int which)
 
 static unsigned int get_machine_model(void)
 {
-	return  ordenador.mode128k + (ordenador.issue==3);
+	if (ordenador.videosystem == 0)
+	return  (ordenador.mode128k + (ordenador.issue==3));
+	else return (6); 
 }
 
 static void set_machine_model(int which)
@@ -334,34 +349,45 @@ static void set_machine_model(int which)
 			ordenador.issue=2;
 			ordenador.mode128k=0;
 			ordenador.ay_emul=0;
+			ordenador.videosystem =0;
 		break;
 	case 1: //48k issue3
 			ordenador.issue=3;
 			ordenador.mode128k=0;
 			ordenador.ay_emul=0;
+			ordenador.videosystem =0;
 		break;
 	case 2: //128k
 			ordenador.issue=3;
 			ordenador.mode128k=1;
 			ordenador.ay_emul=1;
+			ordenador.videosystem =0;
 		break;
 	case 3: //Amstrad +2
 			ordenador.issue=3;
 			ordenador.mode128k=2;
 			ordenador.ay_emul=1;
+			ordenador.videosystem =0;
 		break;
 	case 4: //Amstrad +2A/+3
 			ordenador.issue=3;
 			ordenador.mode128k=3;
 			ordenador.ay_emul=1;
 			ordenador.mdr_active=0;
+			ordenador.videosystem =0;
 		break;
 	case 5: //128K Spanish
 			ordenador.issue=3;
 			ordenador.mode128k=4;
 			ordenador.ay_emul=1;
+			ordenador.videosystem =0;
+		break;
+	case 6: //48k ntsc
+			ordenador.issue=3;
+			ordenador.mode128k=0;
+			ordenador.ay_emul=0;
+			ordenador.videosystem =1;
 		break;
-	
 	}
 }
 
@@ -369,20 +395,21 @@ static void emulation_settings(void)
 {
 	unsigned int submenus[7],submenus_old[7];
 	int opt, i;
-	unsigned char old_mode;
+	unsigned char old_mode, old_videosystem;
 	
 	memset(submenus, 0, sizeof(submenus));
 	
 	submenus[0] = get_machine_model();
 	submenus[1] = ordenador.volume/2;
-	submenus[2] = !ordenador.tape_fast_load;
+	submenus[2] = jump_frames;
-	submenus[3] = ordenador.turbo;
+	submenus[3] = !ordenador.tape_fast_load;
-	submenus[4] = !ordenador.dblscan;
+	submenus[4] = ordenador.turbo;
-	submenus[5] = ordenador.bw;
+	submenus[5] = !ordenador.precision;
 	submenus[6] = !ordenador.ay_emul;
 	
 	for (i=0; i<7; i++) submenus_old[i] = submenus[i];
 	old_mode=ordenador.mode128k;
+	old_videosystem = ordenador.videosystem;
 	
 	opt = menu_select_title("Emulation settings menu",
 			emulation_messages, submenus);
@@ -390,36 +417,72 @@ static void emulation_settings(void)
 		return;
 	
 	set_machine_model(submenus[0]);
-	if (old_mode!=ordenador.mode128k) ResetComputer(); else 
+	if ((old_mode!=ordenador.mode128k)||(old_videosystem!=ordenador.videosystem)) ResetComputer(); else 
 	ordenador.ay_emul = !submenus[6];
 	
 	ordenador.volume = submenus[1]*2; //I should use set_volume() ?
-	ordenador.tape_fast_load = !submenus[2];
+	jump_frames = submenus[2];
-	ordenador.turbo = submenus[3];
+	ordenador.tape_fast_load = !submenus[3];
+	ordenador.turbo = submenus[4];
 	
 	curr_frames=0;
+	if (submenus[4] != submenus_old[4])
+	{
 	switch(ordenador.turbo)
 	{
 	case 0: //off
-		ordenador.tst_sample=3500000/ordenador.freq;
+		update_frequency(0); //set machine frequency
 		jump_frames=0;
 		break;	
 	case 1:	//speed	
-		ordenador.tst_sample=12000000/ordenador.freq; //5,0 MHz max emulation speed for wii at full frames
+		update_frequency(10000000);
-		jump_frames=3;
+		jump_frames=4;
+		ordenador.precision =0;
 		break;
-	case 2:	//very speed
+	case 2:	//ultra speed
-		ordenador.tst_sample=20000000/ordenador.freq;
+		update_frequency(15000000);
 		jump_frames=24;
+		ordenador.precision =0;
 		break;
 	default:
 		break;	
 	}
+	}
 	
-	ordenador.dblscan = !submenus[4];
+	if (ordenador.turbo==0) ordenador.precision = !submenus[5];
-	ordenador.bw = submenus[5]; 
+}
-	if (submenus[5]!=submenus_old[5]) computer_set_palete();
 
+static void save_load_general_configurations(int);
+
+static void screen_settings(void)
+{
+	unsigned int submenus[3],submenus_old[3];
+	int opt, i;
+	
+	memset(submenus, 0, sizeof(submenus));
+	
+	submenus[0] = !ordenador.dblscan;
+	submenus[1] = ordenador.bw;
+	submenus[2] = ordenador.zaurus_mini?1:0;
+	
+	for (i=0; i<3; i++) submenus_old[i] = submenus[i];
+	
+	
+	opt = menu_select_title("Screen settings menu",
+			screen_messages, submenus);
+	if (opt < 0)
+		return;
+	
+	ordenador.dblscan = !submenus[0];
+	ordenador.bw = submenus[1]; 
+	if (submenus[1]!=submenus_old[1]) computer_set_palete();
+	
+	if (submenus[2] != submenus_old[2])
+	{
+		if (submenus[2]==0) {ordenador.zaurus_mini = 0; ordenador.text_mini=0;}
+		else {ordenador.zaurus_mini = 3; ordenador.text_mini=1;}
+	    restart_video();
+	}	
 }
 
 static void setup_joystick(int joy, unsigned int sdl_key, int joy_key)
@@ -544,7 +607,7 @@ static void delete_mdr()
 		return; 
 	
 	if ((ext_matches(filename, ".mdr")|ext_matches(filename, ".MDR"))
-	&& (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138, FULL_DISPLAY_Y /2-48))) unlink(filename);
+	&& (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138/RATIO, FULL_DISPLAY_Y /2-48/RATIO))) unlink(filename);
 	
 	free((void *)filename);
 }
@@ -707,7 +770,7 @@ static void save_scr()
 	if(fichero!=NULL)
 	{	
 		fclose(fichero);
-		if (!msgYesNo("Overwrite the exiting file?", 0, FULL_DISPLAY_X /2-160, FULL_DISPLAY_Y /2-48))
+		if (!msgYesNo("Overwrite the exiting file?", 0, FULL_DISPLAY_X /2-160/RATIO, FULL_DISPLAY_Y /2-48/RATIO))
 			return; // file already exists
 	}
 	
@@ -792,7 +855,7 @@ static void tools()
 	switch(opt)
 		{
 		case 0: // Show keyboard 
-			show_keyboard_layout();
+			if (ordenador.zaurus_mini == 0) show_keyboard_layout(); else msgInfo("No picture available in 320X240 resolution",3000,NULL);
 			break;
 		case 2: // Save SCR
 			save_scr();
@@ -879,7 +942,7 @@ static void save_load_snapshot(int which)
 				}
 			}
 			else // Delete snashot file
-				if (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138, FULL_DISPLAY_Y /2-48)) unlink(filename);
+				if (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138/RATIO, FULL_DISPLAY_Y /2-48/RATIO)) unlink(filename);
 		}	
 		free((void*)filename);
 	} break;
@@ -892,7 +955,7 @@ static void save_load_snapshot(int which)
 				msgInfo("Snapshot saved",3000,NULL);
 				break;
 			case -1:
-				if (msgYesNo("Overwrite the exiting file?", 0, FULL_DISPLAY_X /2-160, FULL_DISPLAY_Y /2-48))
+				if (msgYesNo("Overwrite the exiting file?", 0, FULL_DISPLAY_X /2-160/RATIO, FULL_DISPLAY_Y /2-48/RATIO))
 				{
 					save_z80(db,1); //force overwrite
 					msgInfo("Snapshot saved",3000,NULL);
@@ -935,7 +998,7 @@ static void save_load_game_configurations(int which)
 				break;
 			}
 			else // Delete config file
-				if (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138, FULL_DISPLAY_Y /2-48)) unlink(filename);
+				if (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138/RATIO, FULL_DISPLAY_Y /2-48/RATIO)) unlink(filename);
 		}	
 		free((void*)filename);
 	} break;
@@ -965,7 +1028,7 @@ static void save_load_game_configurations(int which)
 				msgInfo("Game confs saved",3000,NULL);
 				break;
 			case -1:
-				if (msgYesNo("Overwrite the exiting file?", 0, FULL_DISPLAY_X /2-160, FULL_DISPLAY_Y /2-48))
+				if (msgYesNo("Overwrite the exiting file?", 0, FULL_DISPLAY_X /2-160/RATIO, FULL_DISPLAY_Y /2-48/RATIO))
 				{
 					save_config_game(&ordenador,db,1); //force overwrite
 					msgInfo("Game confs saved",3000,NULL);
@@ -1018,7 +1081,7 @@ static void save_load_general_configurations(int which)
 				break;
 			}
 			else // Delete config file
-				if (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138, FULL_DISPLAY_Y /2-48)) unlink(config_path);
+				if (msgYesNo("Delete the file?", 0, FULL_DISPLAY_X /2-138/RATIO, FULL_DISPLAY_Y /2-48/RATIO)) unlink(config_path);
 		
 	} break;
 	case 1: // Save configuration file
@@ -1102,15 +1165,18 @@ void main_menu()
 			emulation_settings();
 			break;
 		case 8:
-			manage_configurations();
+			screen_settings();
 			break;
 		case 9:
-			microdrive();
+			manage_configurations();
 			break;
 		case 10:
-			tools();
+			microdrive();
 			break;	
 		case 11:
+			tools();
+			break;
+		case 12:
 			ResetComputer ();
 			ordenador.pause = 1;
 			if (ordenador.tap_file != NULL) {
@@ -1118,17 +1184,17 @@ void main_menu()
 				rewind_tape (ordenador.tap_file,1);				
 			}
 			break;	
-		case 12:
+		case 13:
 			help();
 			break;
-		case 13:
+		case 14:
-			if (msgYesNo("Are you sure to quit?", 0, FULL_DISPLAY_X /2-138, FULL_DISPLAY_Y /2-48)) 
+			if (msgYesNo("Are you sure to quit?", 0, FULL_DISPLAY_X /2-138/RATIO, FULL_DISPLAY_Y /2-48/RATIO)) 
 				{salir = 0;}	
 			break;
 		default:
 			break;
 		}
-	} while (opt == 5 || opt == 7 || opt == 9 || opt == 12);
+	} while (opt == 5 || opt == 7 || opt == 10 || opt == 13);
 	
 	clean_screen();
 	

src/menu_sdl.c

@@ -72,7 +72,7 @@ static SDL_Surface *real_screen;
 #define IS_MARKER(p_msg) ( (p_msg)[0] == '@' )
 
 static int is_inited = 0;
-static TTF_Font *menu_font16, *menu_font20;
+static TTF_Font *menu_font16, *menu_font20, *menu_font8, *menu_font10;
 #if defined(GEKKO)
 #define FONT_PATH "/fbzx-wii/fbzx/FreeMono.ttf"
 #else
@@ -89,21 +89,21 @@ int msgInfo(char *text, int duration, SDL_Rect *irc)
 	SDL_Rect rc;
 	SDL_Rect brc;
 
-	X = (FULL_DISPLAY_X /2) - (len / 2 + 1)*12;
+	X = (FULL_DISPLAY_X /2) - (len / 2 + 1)*12/RATIO;
-	Y = (FULL_DISPLAY_Y /2) - 24;
+	Y = (FULL_DISPLAY_Y /2) - 24/RATIO;
 
-	brc.x = FULL_DISPLAY_X/2-2*12; 
+	brc.x = FULL_DISPLAY_X/2-2*12/RATIO; 
-	brc.y=Y+42;
+	brc.y=Y+42/RATIO;
-	brc.w=48;
+	brc.w=48/RATIO;
-	brc.h=20;
+	brc.h=20/RATIO;
 
 	rc.x = X; 
 	rc.y=Y;
-	rc.w=12*(len + 2);
+	rc.w=12*(len + 2)/RATIO;
-	rc.h=duration > 0 ? 48 : 80;
+	rc.h=duration > 0 ? 48/RATIO : 80/RATIO;
 
-	src.x=rc.x+4;
+	src.x=rc.x+4/RATIO;
-	src.y=rc.y+4;
+	src.y=rc.y+4/RATIO;
 	src.w=rc.w;
 	src.h=rc.h;
 
@@ -117,7 +117,7 @@ int msgInfo(char *text, int duration, SDL_Rect *irc)
 	}
 	SDL_FillRect(real_screen, &src, SDL_MapRGB(real_screen->format, 0, 96, 0));	
 	SDL_FillRect(real_screen, &rc, SDL_MapRGB(real_screen->format, 128, 128, 128));
-	menu_print_font(real_screen, 255,255,255, X+12, Y+12, text,20);
+	menu_print_font(real_screen, 255,255,255, X+12/RATIO, Y+12/RATIO, text,20);
 	SDL_UpdateRect(real_screen, src.x, src.y, src.w, src.h);
 	SDL_UpdateRect(real_screen, rc.x, rc.y, rc.w,rc.h);
 	if (duration > 0)
@@ -125,7 +125,7 @@ int msgInfo(char *text, int duration, SDL_Rect *irc)
 	else if (duration < 0)
 	{
 		SDL_FillRect(real_screen, &brc, SDL_MapRGB(real_screen->format, 0x00, 0x80, 0x00));
-		menu_print_font(real_screen, 0,0,0, FULL_DISPLAY_X/2-12, Y+42, "OK",20);
+		menu_print_font(real_screen, 0,0,0, FULL_DISPLAY_X/2-12/RATIO, Y+42/RATIO, "OK",20);
 		SDL_UpdateRect(real_screen, brc.x, brc.y, brc.w, brc.h);
 		while (!(KEY_SELECT & menu_wait_key_press())) {}
 
@@ -151,22 +151,22 @@ int msgYesNo(char *text, int default_opt, int x, int y)
 	uint32_t key;
 
 	if (x < 0)
-		X = (FULL_DISPLAY_X /2) - (len / 2 + 1)*12;
+		X = (FULL_DISPLAY_X /2) - (len / 2 + 1)*12/RATIO;
 	else
 		X = x;
 
 	if (y < 0)	
-		Y = (FULL_DISPLAY_Y /2) - 48;
+		Y = (FULL_DISPLAY_Y /2) - 48/RATIO;
 	else
 		Y = y;
 
 	rc.x=X; 
 	rc.y=Y;
-	rc.w=12*(len + 2);
+	rc.w=12*(len + 2)/RATIO;
-	rc.h=80;
+	rc.h=80/RATIO;
 
-	src.x=rc.x+4;
+	src.x=rc.x+4/RATIO;
-	src.y=rc.y+4;
+	src.y=rc.y+4/RATIO;
 	src.w=rc.w;
 	src.h=rc.h;
 
@@ -174,27 +174,27 @@ int msgYesNo(char *text, int default_opt, int x, int y)
 	{
 		SDL_FillRect(real_screen, &src, SDL_MapRGB(real_screen->format, 0, 96, 0));	
 		SDL_FillRect(real_screen, &rc, SDL_MapRGB(real_screen->format, 128, 128, 128));
-		menu_print_font(real_screen, 255,255,255, X+12, Y+12, text,20);
+		menu_print_font(real_screen, 255,255,255, X+12/RATIO, Y+12/RATIO, text,20);
 
 		if (default_opt)
 		{
-			brc.x=rc.x + rc.w/2-5*12; 
+			brc.x=rc.x + rc.w/2-5*12/RATIO; 
-			brc.y=rc.y+42;
+			brc.y=rc.y+42/RATIO;
-			brc.w=12*3;
+			brc.w=12*3/RATIO;
-			brc.h=20;
+			brc.h=20/RATIO;
 			SDL_FillRect(real_screen, &brc, SDL_MapRGB(real_screen->format, 0x00, 0x80, 0x00));
 		}
 		else
 		{
-			brc.x=rc.x + rc.w/2+5*12-2*12-6; 
+			brc.x=rc.x + rc.w/2+5*12/RATIO-2*12/RATIO-6/RATIO; 
-			brc.y=rc.y+42;
+			brc.y=rc.y+42/RATIO;
-			brc.w=12*3;
+			brc.w=12*3/RATIO;
-			brc.h=20;
+			brc.h=20/RATIO;
 			SDL_FillRect(real_screen, &brc, SDL_MapRGB(real_screen->format, 0x80, 0x00, 0x00));
 		}
 	
-		menu_print_font(real_screen, 255,255,255, rc.x + rc.w/2-5*12, Y+42, "YES",20);
+		menu_print_font(real_screen, 255,255,255, rc.x + rc.w/2-5*12/RATIO, Y+42/RATIO, "YES",20);
-		menu_print_font(real_screen, 255,255,255, rc.x + rc.w/2-5*12+8*12, Y+42, "NO",20);
+		menu_print_font(real_screen, 255,255,255, rc.x + rc.w/2-5*12/RATIO+8*12/RATIO, Y+42/RATIO, "NO",20);
 		
 		SDL_UpdateRect(real_screen, src.x, src.y, src.w, src.h);
 		SDL_UpdateRect(real_screen, rc.x, rc.y, rc.w,rc.h);
@@ -364,8 +364,17 @@ void menu_print_font(SDL_Surface *screen, int r, int g, int b,
 			buf[i] = ' ';
 	}
 
+	if (FULL_DISPLAY_X == 640)
+		{
 		if (font_size == 16) font_surf = TTF_RenderUTF8_Blended(menu_font16, buf, color);
 		else font_surf = TTF_RenderUTF8_Blended(menu_font20, buf, color);
+		}
+	else 	
+		{
+		if (font_size == 16) font_surf = TTF_RenderUTF8_Blended(menu_font8, buf, color);
+		else font_surf = TTF_RenderUTF8_Blended(menu_font10, buf, color);
+		}
+		
 	if (!font_surf)
 	{
 		fprintf(stderr, "%s\n", TTF_GetError());
@@ -843,8 +852,16 @@ int menu_select_sized(const char *title, const char **msgs, int *submenus, int s
 	menu_t menu;
 	int out;
 
+	if (FULL_DISPLAY_X == 640)
+	{
 	if (font_size == 16) menu_init_internal(&menu, title, menu_font16, msgs, x, y, x2, y2);
 	else menu_init_internal(&menu, title, menu_font20, msgs, x, y, x2, y2);
+	}
+	else
+	{
+	if (font_size == 16) menu_init_internal(&menu, title, menu_font8, msgs, x, y, x2, y2);
+	else menu_init_internal(&menu, title, menu_font10, msgs, x, y, x2, y2);
+	}
 
 	if (sel >= 0)
 		select_one(&menu, sel);
@@ -860,7 +877,7 @@ int menu_select_title(const char *title, const char **msgs, int *submenus)
 {
 	SDL_FillRect(real_screen, 0, SDL_MapRGB(real_screen->format, 0, 0, 0));
 	return menu_select_sized(title, msgs, submenus, 0,
-			32, 32, FULL_DISPLAY_X-32, FULL_DISPLAY_Y-32,
+			32/RATIO, 32/RATIO, FULL_DISPLAY_X-32/RATIO, FULL_DISPLAY_Y-32/RATIO,
 			NULL, NULL, 20);
 }
 
@@ -948,7 +965,7 @@ const char *menu_select_file(const char *dir_path,const char *selected_file, int
 	if (dir_path == NULL)
 		dir_path = "";
 	return menu_select_file_internal(dir_path,
-			0, 32, FULL_DISPLAY_X, FULL_DISPLAY_Y - 32, selected_file, which);
+			0, 32/RATIO, FULL_DISPLAY_X, FULL_DISPLAY_Y - 32/RATIO, selected_file, which);
 }
 
 static TTF_Font *read_font(const char *path, int font_size)
@@ -984,15 +1001,21 @@ static TTF_Font *read_font(const char *path, int font_size)
 	return out;
 }
 
-void menu_init(SDL_Surface *screen)
+void font_init()
 {
 	TTF_Init();
 
 	menu_font16 = read_font(FONT_PATH, 16);
 	menu_font20 = read_font(FONT_PATH, 20);
+	menu_font8 = read_font(FONT_PATH, 8);
+	menu_font10 = read_font(FONT_PATH, 10);
+}
 
+void menu_init(SDL_Surface *screen)
+{
 	real_screen = screen;
-	VirtualKeyboard_init(screen, menu_font16); //prima c'era il font 16 alt
+	if (FULL_DISPLAY_X == 640) VirtualKeyboard_init(screen, menu_font16); //prima c'era il font 16 alt
+	else VirtualKeyboard_init(screen, menu_font8); 
 	is_inited = 1;
 }
 

src/menu_sdl.h

@@ -38,8 +38,10 @@
 #define KEY_PAGEDOWN  64
 #define KEY_PAGEUP   128
 #define KEY_HELP     256
-#define FULL_DISPLAY_X 640
+
-#define FULL_DISPLAY_Y 480
+int FULL_DISPLAY_X; //640
+int FULL_DISPLAY_Y; //480
+int RATIO;
 
 
 void menu_print_font(SDL_Surface *screen, int r, int g, int b, int x, int y, const char *msg, int font_size);
@@ -58,6 +60,8 @@ extern int msgInfo(char *text, int duration, SDL_Rect *rc);
 
 extern int msgYesNo(char *text, int def,int x, int y);
 
+void font_init();
+
 void menu_init(SDL_Surface *screen);
 
 int menu_is_inited(void);

src/menus.c

@@ -232,18 +232,21 @@ void settings_menu() {
 			ordenador.issue=3;
 			ordenador.mode128k=1;
 			ordenador.ay_emul=1;
+			ordenador.videosystem=0;
 			ResetComputer();
 		break;
 		case SDLK_4:
 			ordenador.issue=3;
 			ordenador.mode128k=2;
 			ordenador.ay_emul=1;
+			ordenador.videosystem=0;
 			ResetComputer();
 		break;
 		case SDLK_5:
 			ordenador.issue=3;
 			ordenador.mode128k=3;
 			ordenador.ay_emul=1;
+			ordenador.videosystem=0;
 			ordenador.mdr_active=0;
 			ResetComputer();
 		break;
@@ -251,6 +254,7 @@ void settings_menu() {
 			ordenador.issue=3;
 			ordenador.mode128k=4;
 			ordenador.ay_emul=1;
+			ordenador.videosystem=0;
 			ResetComputer();
 		break;
 		case SDLK_7:
@@ -284,13 +288,13 @@ void settings_menu() {
 		case SDLK_t:
 			curr_frames=0;
 			if(ordenador.turbo){
-				ordenador.tst_sample=3500000/ordenador.freq;
+				update_frequency(0); //set machine frequency
 				ordenador.turbo = 0;
 				jump_frames=0;
 			} else {
-				ordenador.tst_sample=12000000/ordenador.freq; //5,0 MHz max emulation speed for wii at full frames
+				update_frequency(10000000); //5,0 MHz max emulation speed for wii at full frames
 				ordenador.turbo = 1;
-				jump_frames=3;	
+				jump_frames=4;	
 			}
 		break;	
 		}
@@ -1988,3 +1992,27 @@ void print_files(struct fichero *filelist,int from,int mark) {
 		pos+=16;
 	}
 }
+
+void update_frequency (int freq)
+{
+if (freq == 0)
+		switch (ordenador.mode128k) {	
+	case 0:		// 48K
+		if (ordenador.videosystem==0) ordenador.cpufreq = 3500000;
+		else ordenador.cpufreq = 3527500;
+	break;
+	case 3:		// +2A/+3
+	case 1:		// 128K
+	case 2:		// +2
+	case 4:		// spanish 128K
+		ordenador.cpufreq = 3546900;
+	break;
+	default:
+	ordenador.cpufreq = 3500000;
+	break;
+	}
+else ordenador.cpufreq = freq;
+
+ordenador.tst_sample=ordenador.cpufreq/ordenador.freq;
+
+}

src/menus.h

@@ -52,3 +52,4 @@ void do_poke();
 int ask_value(int *final_value,int y_coord,int max_value);
 void tools_menu();
 int launch_menu(unsigned int key_pressed);
+void update_frequency (int freq);

src/tape.c

@@ -743,7 +743,7 @@ void fastload_block (FILE * fichero) {
 			salir = 2;
 		if (!salir) {
 			retval=fread (value, 1, 1, fichero);	// read byte
-			Z80free_Wr (procesador.Rm.wr.IX, (byte) value[0]);	// store the byte
+			Z80free_Wr_fake (procesador.Rm.wr.IX, (byte) value[0]);	// store the byte
 			procesador.Rm.wr.IX++;
 			procesador.Rm.wr.DE--;
 			longitud--;

src/z80free/Z80free.c

@@ -93,10 +93,10 @@ int Z80free_ustep(Z80FREE *processor) {
 				Z80free_doPush(processor,processor->PC);
 				if (processor->IM!=2) { // we will forget IM0 mode for now; maybe in the future...
 					processor->PC=0x0038;
-					return (13);
+					return (13); //IM1
 				} else {
 					processor->PC=Z80free_read16(((((word)processor->I)<<8)&0xFF00) | ((word)processor->empty_bus));
-					return (19);
+					return (19); //IM2
 				}
 			}
 		}
@@ -105,7 +105,7 @@ int Z80free_ustep(Z80FREE *processor) {
 	if (processor->IFF1>1) // set the right status for interrupts
 		processor->IFF1--;
 
-	opcode=Z80free_Rd(processor->PC);
+	opcode=Z80free_Rd_fetch(processor->PC);
 	processor->PC++;
 	switch(processor->Status) {
 	case Z80INT:
@@ -145,7 +145,7 @@ int Z80free_ustep(Z80FREE *processor) {
 		}
 		processor->Status=Z80XX;
 		if (opcode==0xCB) {
-			d1=Z80free_Rd(processor->PC++);
+			d1=Z80free_Rd_fetch(processor->PC++);
 			retval+=Z80free_codesDDCB(processor,d1);
 		} else {
 			retval+=Z80free_codesDD(processor,opcode);
@@ -163,7 +163,7 @@ int Z80free_ustep(Z80FREE *processor) {
 		}
 		processor->Status=Z80XX;
 		if (opcode==0xCB) {
-			d1=Z80free_Rd(processor->PC++);
+			d1=Z80free_Rd_fetch(processor->PC++);
 			retval+=Z80free_codesFDCB(processor,d1);
 		} else {
 			retval+=Z80free_codesFD(processor,opcode);

src/z80free/Z80free.h

@@ -139,9 +139,12 @@ int Z80free_ustep(Z80FREE *);
 void Z80free_INT(Z80FREE *,byte);
 
 byte Z80free_Rd (register word Addr);
+byte Z80free_Rd_fetch (register word Addr);
 void Z80free_Wr (register word Addr, register byte Value);
+void Z80free_Wr_fake (register word Addr, register byte Value);
 byte Z80free_In (register word Port);
 void Z80free_Out (register word Port, register byte Value);
+void Z80free_Out_fake (register word Port, register byte Value);
 
 /* Opcode functions */
 

src/z80free/Z80free_codesDDCB.c

@@ -23,7 +23,7 @@ int Z80free_codesDDCB (Z80FREE *processor,byte d1) {
 	static byte tmp1;
 	static word tmp2;
 	static byte opcode;
-	opcode=Z80free_Rd(processor->PC++);
+	opcode=Z80free_Rd_fetch(processor->PC++);
 
 	switch(opcode) {
 	case 0: // LD_RLC B,(IX+d)

src/z80free/Z80free_codesFDCB.c

@@ -23,7 +23,7 @@ int Z80free_codesFDCB (Z80FREE *processor,byte d1) {
 	static byte tmp1;
 	static word tmp2;
 	static byte opcode;
-	opcode=Z80free_Rd(processor->PC++);
+	opcode=Z80free_Rd_fetch(processor->PC++);
 
 	switch(opcode) {
 	case 0: // LD_RLC B,(IY+d)