////////////////////////////////////////////////////////////////////////////////
// GPU
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
// 7.04.2002: Fixed sprites order
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////

//#define STATISTICS

#include "../inc/rom.h"
#include "../inc/nec.h"
#include "../inc/io.h"
#include "../inc/gpu.h"

#ifdef STATISTICS	
	#include "ticker.h"
#endif
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
extern UINT8	*internalRam;

////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
#ifdef STATISTICS	
	long	ws_4_shades_tiles_cache_update_time=0;
	long	ws_4_colors_tiles_cache_update_time=0;
	long	ws_16_colors_packed_tiles_cache_update_time=0;
	long	ws_16_colors_layered_tiles_cache_update_time=0;

	long	ws_4_shades_tiles_cache_update_number=0;
	long	ws_4_colors_tiles_cache_update_number=0;
	long	ws_16_colors_packed_tiles_cache_update_number=0;
	long	ws_16_colors_layered_tiles_cache_update_number=0;

	long	ws_background_color_rendering_time=0;
	long	ws_background_rendering_time=0;
	long	ws_foreground_rendering_time=0;
	long	ws_priority_0_sprites_rendering_time=0;
	long	ws_priority_1_sprites_rendering_time=0;
#endif
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
#define O_RGB555(R,G,B) ((((int)(R))<<10)|(((int)(G))<<5)|((int)(B)))

UINT8	ws_gpu_operatingInColor;
UINT8	ws_videoMode;
UINT8	ws_gpu_scanline=0;

INT16	ws_palette[16*4];
INT8	ws_paletteColors[8];
INT16	wsc_palette[16*16];

char	ws_shades[16];
int		ws_gpu_forceColorSystemBool=0;
int		ws_gpu_forceMonoSystemBool=0;



// white
#define SHADE_COLOR_RED		1.00
#define SHADE_COLOR_GREEN	1.00
#define SHADE_COLOR_BLUE	1.00

char	ws_colour_scheme_default[16]={	
						O_RGB555(SHADE_COLOR_RED*30,SHADE_COLOR_GREEN*30,SHADE_COLOR_BLUE*30),
						O_RGB555(SHADE_COLOR_RED*28,SHADE_COLOR_GREEN*28,SHADE_COLOR_BLUE*28),
						O_RGB555(SHADE_COLOR_RED*26,SHADE_COLOR_GREEN*26,SHADE_COLOR_BLUE*26),
						O_RGB555(SHADE_COLOR_RED*24,SHADE_COLOR_GREEN*24,SHADE_COLOR_BLUE*24),
						O_RGB555(SHADE_COLOR_RED*22,SHADE_COLOR_GREEN*22,SHADE_COLOR_BLUE*22),
						O_RGB555(SHADE_COLOR_RED*20,SHADE_COLOR_GREEN*20,SHADE_COLOR_BLUE*20),
						O_RGB555(SHADE_COLOR_RED*18,SHADE_COLOR_GREEN*18,SHADE_COLOR_BLUE*18),
						O_RGB555(SHADE_COLOR_RED*16,SHADE_COLOR_GREEN*16,SHADE_COLOR_BLUE*16),
						O_RGB555(SHADE_COLOR_RED*14,SHADE_COLOR_GREEN*14,SHADE_COLOR_BLUE*14),
						O_RGB555(SHADE_COLOR_RED*12,SHADE_COLOR_GREEN*12,SHADE_COLOR_BLUE*12),
						O_RGB555(SHADE_COLOR_RED*10,SHADE_COLOR_GREEN*10,SHADE_COLOR_BLUE*10),
						O_RGB555(SHADE_COLOR_RED*8,SHADE_COLOR_GREEN*8,SHADE_COLOR_BLUE*8),
						O_RGB555(SHADE_COLOR_RED*6,SHADE_COLOR_GREEN*6,SHADE_COLOR_BLUE*6),
						O_RGB555(SHADE_COLOR_RED*4,SHADE_COLOR_GREEN*4,SHADE_COLOR_BLUE*4),
						O_RGB555(SHADE_COLOR_RED*2,SHADE_COLOR_GREEN*2,SHADE_COLOR_BLUE*2),
						O_RGB555(SHADE_COLOR_RED*0,SHADE_COLOR_GREEN*0,SHADE_COLOR_BLUE*0)
					};
// green
#undef  SHADE_COLOR_RED
#undef  SHADE_COLOR_GREEN
#undef  SHADE_COLOR_BLUE
#define SHADE_COLOR_RED		0.20
#define SHADE_COLOR_GREEN	0.90
#define SHADE_COLOR_BLUE	0.20

char	ws_colour_scheme_green[16]={	
						O_RGB555(SHADE_COLOR_RED*30,SHADE_COLOR_GREEN*30,SHADE_COLOR_BLUE*30),
						O_RGB555(SHADE_COLOR_RED*28,SHADE_COLOR_GREEN*28,SHADE_COLOR_BLUE*28),
						O_RGB555(SHADE_COLOR_RED*26,SHADE_COLOR_GREEN*26,SHADE_COLOR_BLUE*26),
						O_RGB555(SHADE_COLOR_RED*24,SHADE_COLOR_GREEN*24,SHADE_COLOR_BLUE*24),
						O_RGB555(SHADE_COLOR_RED*22,SHADE_COLOR_GREEN*22,SHADE_COLOR_BLUE*22),
						O_RGB555(SHADE_COLOR_RED*20,SHADE_COLOR_GREEN*20,SHADE_COLOR_BLUE*20),
						O_RGB555(SHADE_COLOR_RED*18,SHADE_COLOR_GREEN*18,SHADE_COLOR_BLUE*18),
						O_RGB555(SHADE_COLOR_RED*16,SHADE_COLOR_GREEN*16,SHADE_COLOR_BLUE*16),
						O_RGB555(SHADE_COLOR_RED*14,SHADE_COLOR_GREEN*14,SHADE_COLOR_BLUE*14),
						O_RGB555(SHADE_COLOR_RED*12,SHADE_COLOR_GREEN*12,SHADE_COLOR_BLUE*12),
						O_RGB555(SHADE_COLOR_RED*10,SHADE_COLOR_GREEN*10,SHADE_COLOR_BLUE*10),
						O_RGB555(SHADE_COLOR_RED*8,SHADE_COLOR_GREEN*8,SHADE_COLOR_BLUE*8),
						O_RGB555(SHADE_COLOR_RED*6,SHADE_COLOR_GREEN*6,SHADE_COLOR_BLUE*6),
						O_RGB555(SHADE_COLOR_RED*4,SHADE_COLOR_GREEN*4,SHADE_COLOR_BLUE*4),
						O_RGB555(SHADE_COLOR_RED*2,SHADE_COLOR_GREEN*2,SHADE_COLOR_BLUE*2),
						O_RGB555(SHADE_COLOR_RED*0,SHADE_COLOR_GREEN*0,SHADE_COLOR_BLUE*0)
					};
// amber
#undef  SHADE_COLOR_RED
#undef  SHADE_COLOR_GREEN
#undef  SHADE_COLOR_BLUE
#define SHADE_COLOR_RED		1.00
#define SHADE_COLOR_GREEN	0.61
#define SHADE_COLOR_BLUE	0.00

char	ws_colour_scheme_amber[16]={	
						O_RGB555(SHADE_COLOR_RED*30,SHADE_COLOR_GREEN*30,SHADE_COLOR_BLUE*30),
						O_RGB555(SHADE_COLOR_RED*28,SHADE_COLOR_GREEN*28,SHADE_COLOR_BLUE*28),
						O_RGB555(SHADE_COLOR_RED*26,SHADE_COLOR_GREEN*26,SHADE_COLOR_BLUE*26),
						O_RGB555(SHADE_COLOR_RED*24,SHADE_COLOR_GREEN*24,SHADE_COLOR_BLUE*24),
						O_RGB555(SHADE_COLOR_RED*22,SHADE_COLOR_GREEN*22,SHADE_COLOR_BLUE*22),
						O_RGB555(SHADE_COLOR_RED*20,SHADE_COLOR_GREEN*20,SHADE_COLOR_BLUE*20),
						O_RGB555(SHADE_COLOR_RED*18,SHADE_COLOR_GREEN*18,SHADE_COLOR_BLUE*18),
						O_RGB555(SHADE_COLOR_RED*16,SHADE_COLOR_GREEN*16,SHADE_COLOR_BLUE*16),
						O_RGB555(SHADE_COLOR_RED*14,SHADE_COLOR_GREEN*14,SHADE_COLOR_BLUE*14),
						O_RGB555(SHADE_COLOR_RED*12,SHADE_COLOR_GREEN*12,SHADE_COLOR_BLUE*12),
						O_RGB555(SHADE_COLOR_RED*10,SHADE_COLOR_GREEN*10,SHADE_COLOR_BLUE*10),
						O_RGB555(SHADE_COLOR_RED*8,SHADE_COLOR_GREEN*8,SHADE_COLOR_BLUE*8),
						O_RGB555(SHADE_COLOR_RED*6,SHADE_COLOR_GREEN*6,SHADE_COLOR_BLUE*6),
						O_RGB555(SHADE_COLOR_RED*4,SHADE_COLOR_GREEN*4,SHADE_COLOR_BLUE*4),
						O_RGB555(SHADE_COLOR_RED*2,SHADE_COLOR_GREEN*2,SHADE_COLOR_BLUE*2),
						O_RGB555(SHADE_COLOR_RED*0,SHADE_COLOR_GREEN*0,SHADE_COLOR_BLUE*0)
					};

char	*ws_tile_cache;
char	*ws_hflipped_tile_cache;

char	*wsc_tile_cache;
char	*wsc_hflipped_tile_cache;

char	*ws_modified_tile;
char	*wsc_modified_tile;

////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_set_colour_scheme(int scheme)
{
	switch (scheme)
	{
	case COLOUR_SCHEME_DEFAULT: memcpy(ws_shades,ws_colour_scheme_default,16*sizeof(INT16)); break;
	case COLOUR_SCHEME_AMBER  : memcpy(ws_shades,ws_colour_scheme_amber,16*sizeof(INT16)); break;
	case COLOUR_SCHEME_GREEN  : memcpy(ws_shades,ws_colour_scheme_green,16*sizeof(INT16)); break;
	}
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_forceColorSystem(void)
{
	ws_gpu_forceColorSystemBool=1;
	ws_gpu_forceMonoSystemBool=0;
	ws_gpu_operatingInColor=1;
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_forceMonoSystem(void)
{
	ws_gpu_forceColorSystemBool=0;
	ws_gpu_forceMonoSystemBool=1;
	ws_gpu_operatingInColor=0;
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_init(void)
{
	ws_tile_cache				= (char*)malloc(512*8*8);
	wsc_tile_cache				= (char*)malloc(1024*8*8);

	ws_hflipped_tile_cache		= (char*)malloc(512*8*8);
	wsc_hflipped_tile_cache		= (char*)malloc(1024*8*8);

	ws_modified_tile			= (char*)malloc(512);
	wsc_modified_tile			= (char*)malloc(1024);

	memset(ws_tile_cache,0x00,512*8*8);
	memset(wsc_tile_cache,0x00,1024*8*8);

	memset(ws_hflipped_tile_cache,0x00,512*8*8);
	memset(wsc_hflipped_tile_cache,0x00,1024*8*8);

	memset(ws_modified_tile,0x01,512);
	memset(wsc_modified_tile,0x01,1024);

	ws_gpu_forceColorSystemBool=0;
	ws_gpu_forceMonoSystemBool=0;
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_done(void)
{
	free(ws_tile_cache);
	free(wsc_tile_cache);
	free(ws_hflipped_tile_cache);
	free(wsc_hflipped_tile_cache);
	free(ws_modified_tile);
	free(wsc_modified_tile);
#ifdef STATISTICS	
	printf("Statistics:\n");
	printf("\tcache:\n");
	if (ws_4_shades_tiles_cache_update_number)
		printf("\t\t4 shades tiles update time         : %i\n",ws_4_shades_tiles_cache_update_time/ws_4_shades_tiles_cache_update_number);
	if (ws_4_colors_tiles_cache_update_number)
		printf("\t\t4 colors tiles update time         : %i\n",ws_4_colors_tiles_cache_update_time/ws_4_colors_tiles_cache_update_number);
	if (ws_16_colors_packed_tiles_cache_update_number)
		printf("\t\t16 colors packed tiles update time : %i\n",ws_16_colors_packed_tiles_cache_update_time/ws_16_colors_packed_tiles_cache_update_number);
	if (ws_16_colors_layered_tiles_cache_update_number)
		printf("\t\t16 colors layered tiles update time: %i\n",ws_16_colors_layered_tiles_cache_update_time/ws_16_colors_layered_tiles_cache_update_number);

	printf("\tscanline rendering:\n");
	long	total=	ws_background_color_rendering_time+ws_background_rendering_time+
					ws_foreground_rendering_time+ws_priority_0_sprites_rendering_time+
					ws_priority_1_sprites_rendering_time;
	printf("\t\tbackground color   : %4i (%3i %%)\n",ws_background_color_rendering_time,(ws_background_color_rendering_time*100)/total);
	printf("\t\tbackground         : %4i (%3i %%)\n",ws_background_rendering_time,(ws_background_rendering_time*100)/total);
	printf("\t\tforeground         : %4i (%3i %%)\n",ws_foreground_rendering_time,(ws_foreground_rendering_time*100)/total);
	printf("\t\tpriority 0 sprites : %4i (%3i %%)\n",ws_priority_0_sprites_rendering_time,(ws_priority_0_sprites_rendering_time*100)/total);
	printf("\t\tpriority 1 sprites : %4i (%3i %%)\n",ws_priority_1_sprites_rendering_time,(ws_priority_1_sprites_rendering_time*100)/total);
#endif
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_changeVideoMode(UINT8 value)
{
	if (ws_videoMode!=(value>>5))
	{
		ws_videoMode=value>>5;
		if (ws_videoMode==4)
			ws_videoMode=2;
		
		// mark all tiles dirty
		memset(wsc_modified_tile,0x01,1024);
		memset(ws_modified_tile,0x01,512);
	}
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_reset(void)
{
	memset(wsc_modified_tile,0x01,1024);
	memset(ws_modified_tile,0x01,512);
	ws_gpu_scanline=0;
	ws_gpu_changeVideoMode(2);
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_clearCache(void)
{
	memset(wsc_modified_tile,0x01,1024);
	memset(ws_modified_tile,0x01,512);
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
char *ws_tileCache_getTileRow(UINT32 tileIndex, UINT32 line, 
							   UINT32 vFlip, UINT32 hFlip, UINT32 bank)
{
	if (ws_gpu_operatingInColor)
	{
		if (bank)
			tileIndex+=512;

		// need to update tile cache ?
		// 4 colors tiles
		if ((ws_videoMode==2)&&(ws_modified_tile[tileIndex]))
		{
#ifdef STATISTICS	
			ws_4_colors_tiles_cache_update_time+=-ticker();
#endif
			char	*tileInCachePtr = &wsc_tile_cache[tileIndex<<6];
			char	*hflippedTileInCachePtr = &wsc_hflipped_tile_cache[tileIndex<<6];
			char	*tileInRamPtr   = (char*)&internalRam[0x2000+(tileIndex<<4)];
			UINT16	tileLine;

			for (int line=0;line<8;line++)
			{
				tileLine=*tileInRamPtr++;

				tileInCachePtr[0]=((tileLine&0x80)>>7)|((tileLine&0x8000)>>14);
				hflippedTileInCachePtr[7]=tileInCachePtr[0];
				tileInCachePtr[1]=((tileLine&0x40)>>6)|((tileLine&0x4000)>>13);
				hflippedTileInCachePtr[6]=tileInCachePtr[1];
				tileInCachePtr[2]=((tileLine&0x20)>>5)|((tileLine&0x2000)>>12);
				hflippedTileInCachePtr[5]=tileInCachePtr[2];
				tileInCachePtr[3]=((tileLine&0x10)>>4)|((tileLine&0x1000)>>11);
				hflippedTileInCachePtr[4]=tileInCachePtr[3];
				tileInCachePtr[4]=((tileLine&0x08)>>3)|((tileLine&0x0800)>>10);
				hflippedTileInCachePtr[3]=tileInCachePtr[4];
				tileInCachePtr[5]=((tileLine&0x04)>>2)|((tileLine&0x0400)>>9);
				hflippedTileInCachePtr[2]=tileInCachePtr[5];
				tileInCachePtr[6]=((tileLine&0x02)>>1)|((tileLine&0x0200)>>8);
				hflippedTileInCachePtr[1]=tileInCachePtr[6];
				tileInCachePtr[7]=((tileLine&0x01)>>0)|((tileLine&0x0100)>>7);
				hflippedTileInCachePtr[0]=tileInCachePtr[7];

				tileInCachePtr+=8;
				hflippedTileInCachePtr+=8;
			}				
			ws_modified_tile[tileIndex]=0;
#ifdef STATISTICS	
			ws_4_colors_tiles_cache_update_time+=ticker();
			ws_4_colors_tiles_cache_update_number++;
#endif
		}
		else
		if (wsc_modified_tile[tileIndex])
		{
			// 16 colors by tile layered mode
			if (ws_videoMode==6)
			{
#ifdef STATISTICS	
				ws_16_colors_layered_tiles_cache_update_time+=-ticker();
#endif
				char	*tileInCachePtr			= &wsc_tile_cache[tileIndex<<6];
				char	*hflippedTileInCachePtr = &wsc_hflipped_tile_cache[tileIndex<<6];
				char	*tileInRamPtr			= (char*)&internalRam[0x4000+(tileIndex<<5)];
				UINT32	tileLine;

				for (int line=0;line<8;line++)
				{
					tileLine=*tileInRamPtr++;
					
					tileInCachePtr[0]=((tileLine&0x00000080)>>7)|((tileLine&0x00008000)>>14)|
									  ((tileLine&0x00800000)>>21)|((tileLine&0x80000000)>>28);
					hflippedTileInCachePtr[7]=tileInCachePtr[0];

					tileInCachePtr[1]=((tileLine&0x00000040)>>6)|((tileLine&0x00004000)>>13)|
									  ((tileLine&0x00400000)>>20)|((tileLine&0x40000000)>>27);
					hflippedTileInCachePtr[6]=tileInCachePtr[1];
					
					tileInCachePtr[2]=((tileLine&0x00000020)>>5)|((tileLine&0x00002000)>>12)|
									  ((tileLine&0x00200000)>>19)|((tileLine&0x20000000)>>26);
					hflippedTileInCachePtr[5]=tileInCachePtr[2];
					
					tileInCachePtr[3]=((tileLine&0x00000010)>>4)|((tileLine&0x00001000)>>11)|
									  ((tileLine&0x00100000)>>18)|((tileLine&0x10000000)>>25);
					hflippedTileInCachePtr[4]=tileInCachePtr[3];
					
					tileInCachePtr[4]=((tileLine&0x00000008)>>3)|((tileLine&0x00000800)>>10)|
									  ((tileLine&0x00080000)>>17)|((tileLine&0x08000000)>>24);
					hflippedTileInCachePtr[3]=tileInCachePtr[4];
					
					tileInCachePtr[5]=((tileLine&0x00000004)>>2)|((tileLine&0x00000400)>>9)|
									  ((tileLine&0x00040000)>>16)|((tileLine&0x04000000)>>23);
					hflippedTileInCachePtr[2]=tileInCachePtr[5];
					
					tileInCachePtr[6]=((tileLine&0x00000002)>>1)|((tileLine&0x00000200)>>8)|
									  ((tileLine&0x00020000)>>15)|((tileLine&0x02000000)>>22);
					hflippedTileInCachePtr[1]=tileInCachePtr[6];
					
					tileInCachePtr[7]=((tileLine&0x00000001)>>0)|((tileLine&0x00000100)>>7)|
									  ((tileLine&0x00010000)>>14)|((tileLine&0x01000000)>>21);
					hflippedTileInCachePtr[0]=tileInCachePtr[7];

					tileInCachePtr+=8;
					hflippedTileInCachePtr+=8;
				}			
#ifdef STATISTICS	
				ws_16_colors_layered_tiles_cache_update_time+=ticker();
				ws_16_colors_layered_tiles_cache_update_number++;
#endif
			}
			else
			// 16 colors by tile packed mode
			if (ws_videoMode==7)
			{
#ifdef STATISTICS	
				ws_16_colors_packed_tiles_cache_update_time+=-ticker();
#endif
				char	*tileInCachePtr = &wsc_tile_cache[tileIndex<<6];
				char	*hflippedTileInCachePtr = &wsc_hflipped_tile_cache[tileIndex<<6];
				char	*tileInRamPtr   = (char*)&internalRam[0x4000+(tileIndex<<5)];
				UINT32	tileLine;

				for (int line=0;line<8;line++)
				{
					tileLine=*tileInRamPtr++;
					
					tileInCachePtr[0]=(tileLine>>4)&0x0f;
					hflippedTileInCachePtr[7]=tileInCachePtr[0];
					tileInCachePtr[1]=(tileLine>>0)&0x0f;
					hflippedTileInCachePtr[6]=tileInCachePtr[1];
					tileInCachePtr[2]=(tileLine>>12)&0x0f;
					hflippedTileInCachePtr[5]=tileInCachePtr[2];
					tileInCachePtr[3]=(tileLine>>8)&0x0f;
					hflippedTileInCachePtr[4]=tileInCachePtr[3];
					tileInCachePtr[4]=(tileLine>>20)&0x0f;
					hflippedTileInCachePtr[3]=tileInCachePtr[4];
					tileInCachePtr[5]=(tileLine>>16)&0x0f;
					hflippedTileInCachePtr[2]=tileInCachePtr[5];
					tileInCachePtr[6]=(tileLine>>28)&0x0f;
					hflippedTileInCachePtr[1]=tileInCachePtr[6];
					tileInCachePtr[7]=(tileLine>>24)&0x0f;
					hflippedTileInCachePtr[0]=tileInCachePtr[7];

					tileInCachePtr+=8;
					hflippedTileInCachePtr+=8;
					
				}				
#ifdef STATISTICS	
				ws_16_colors_packed_tiles_cache_update_time+=ticker();
				ws_16_colors_packed_tiles_cache_update_number++;
#endif
			}
			else
			{
				// unknown mode 
			}
			// tile cache updated
			wsc_modified_tile[tileIndex]=0;
		}	
		if (vFlip)
			line=7-line;
		if (hFlip)
			return(&wsc_hflipped_tile_cache[(tileIndex<<6)+(line<<3)]);
		else
			return(&wsc_tile_cache[(tileIndex<<6)+(line<<3)]);
	
	}
	else
	{
		// need to update tile cache ?
		if (ws_modified_tile[tileIndex])
		{
#ifdef STATISTICS	
			ws_4_shades_tiles_cache_update_time+=-ticker();
#endif
			char	*tileInCachePtr			 = &ws_tile_cache[tileIndex<<6];
			char	*hflippedTileInCachePtr	 = &ws_hflipped_tile_cache[(tileIndex<<6)+7];
			char	*tileInRamPtr			 = (char*)&internalRam[0x2000+(tileIndex<<4)];
			UINT32	tileLine;

			for (int line=0;line<4;line++)
			{
				tileLine=*tileInRamPtr++;
								
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x80)>>7)|((tileLine&0x8000)>>14);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x40)>>6)|((tileLine&0x4000)>>13);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x20)>>5)|((tileLine&0x2000)>>12);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x10)>>4)|((tileLine&0x1000)>>11);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x08)>>3)|((tileLine&0x0800)>>10);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x04)>>2)|((tileLine&0x0400)>>9);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x02)>>1)|((tileLine&0x0200)>>8);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x01)>>0)|((tileLine&0x0100)>>7);
				hflippedTileInCachePtr+=16;
				tileLine>>=16;
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x80)>>7)|((tileLine&0x8000)>>14);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x40)>>6)|((tileLine&0x4000)>>13);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x20)>>5)|((tileLine&0x2000)>>12);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x10)>>4)|((tileLine&0x1000)>>11);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x08)>>3)|((tileLine&0x0800)>>10);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x04)>>2)|((tileLine&0x0400)>>9);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x02)>>1)|((tileLine&0x0200)>>8);
				*hflippedTileInCachePtr--=*tileInCachePtr++=((tileLine&0x01)>>0)|((tileLine&0x0100)>>7);
				hflippedTileInCachePtr+=16;
			}				
			// tile cache updated
			ws_modified_tile[tileIndex]=0;
#ifdef STATISTICS	
			ws_4_shades_tiles_cache_update_time+=ticker();
			ws_4_shades_tiles_cache_update_number++;
#endif
		}
		if (vFlip)
			line=7-line;
		if (hFlip)
			return(&ws_hflipped_tile_cache[(tileIndex<<6)+(line<<3)]);
		else
			return(&ws_tile_cache[(tileIndex<<6)+(line<<3)]);
	}
	return(NULL);
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_drawClippedSpriteLine(INT16 *framebuffer, UINT16 scanline,
							  UINT32 x, UINT32 y, UINT32 tileIndex, UINT32 paletteIndex,
							  UINT32 vFlip, UINT32 hFlip,
							  UINT32 clip_x0, UINT32 clip_y0, UINT32 clip_x1, UINT32 clip_y1)
{
	
	if ((scanline<y)||(scanline>(y+7)))
		return;
	if ((x+7<clip_x0)||(x>=clip_x1))
		return;
	if ((y+7<clip_y0)||(y>=clip_y1))
		return;
	
	char	*ws_tileRow=ws_tileCache_getTileRow(tileIndex,(scanline-y)&0x07,hFlip,vFlip, 0);
	UINT16	 nbPixels=8;
	if (x<clip_x0)
	{
		ws_tileRow+=clip_x0-x;
		nbPixels-=clip_x0-x;
		x=clip_x0;
	}
	if (x+nbPixels>clip_x1)
		nbPixels=(clip_x1-x);
	framebuffer+=x;

	if (ws_gpu_operatingInColor)
	{
		INT16	*wsc_paletteAlias=&wsc_palette[paletteIndex<<4];
		while (nbPixels)
		{
			if (*ws_tileRow) *framebuffer=wsc_paletteAlias[*ws_tileRow];
			framebuffer++;	ws_tileRow++;
			nbPixels--;
		}
	}
	else
	{
		INT16	*ws_paletteAlias=&ws_palette[paletteIndex<<2];
		if (paletteIndex&0x04)
		{
			while (nbPixels)
			{
				if (*ws_tileRow) *framebuffer=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
				framebuffer++;	ws_tileRow++;
				nbPixels--;
			}
		}
		else
		{
			while (nbPixels)
			{
				*framebuffer=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
				framebuffer++;	ws_tileRow++;
				nbPixels--;
			}
		}
	}
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_renderScanline(INT16 *framebuffer)
{

	if (ws_gpu_scanline>143)	
		return;
#ifdef STATISTICS	
	long startTime=ticker();
#endif
	framebuffer+=(224*ws_gpu_scanline);

	// fill with background color
	INT16 backgroundColor;
	if (ws_gpu_operatingInColor)
		backgroundColor=wsc_palette[ws_ioRam[0x01]];
	else
		backgroundColor=ws_shades[ws_paletteColors[ws_palette[((ws_ioRam[0x01]&0xf0)>>2)+(ws_ioRam[0x01]&0x03)]]];

	for (int i=0;i<224;i++)
		framebuffer[i]=backgroundColor;
#ifdef STATISTICS	
	ws_background_color_rendering_time=ticker();
#endif
	// render background layer
	if (ws_ioRam[0x00]&0x01)
	{
		int ws_bgScroll_x=ws_ioRam[0x10];
		int ws_bgScroll_y=ws_ioRam[0x11];
		
		// seek to the first tile
		ws_bgScroll_y=(ws_bgScroll_y+ws_gpu_scanline)&0xff;

		// note: byte ordering assumptions!
		int	ws_currentTile=(ws_bgScroll_x>>3);
		UINT16	*ws_bgScrollRamBase=(UINT16*)(internalRam+(((UINT32)ws_ioRam[0x07]&0x0f)<<11)+
									((ws_bgScroll_y&0xfff8)<<3));
		
		int	lineInTile   = ws_bgScroll_y&0x07;
		int columnInTile = ws_bgScroll_x&0x07;
	
		INT16 *scanlinePtr=framebuffer;

		if (ws_gpu_operatingInColor)
		{
			// render the first clipped tile
			if (columnInTile)
			{
				UINT16	tileInfo=ws_bgScrollRamBase[ws_currentTile&0x1f];
				ws_currentTile++;
				char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile, tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
				INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
				ws_tileRow+=columnInTile;
				for (int i=columnInTile;i<8;i++)
				{
					if (*ws_tileRow)	
						*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
					scanlinePtr++; 
					ws_tileRow++;
				}
			}

			// render the tiles between them
			int nbTiles=28;
			if (columnInTile)
				nbTiles=27;
			
			for (int i=0;i<nbTiles;i++)
			{
				UINT16	tileInfo=ws_bgScrollRamBase[ws_currentTile&0x1f];
				ws_currentTile++;
				char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile, tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
				INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];

				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
			}

			// render the last clipped tile
			if (columnInTile)
			{
				UINT16	tileInfo=ws_bgScrollRamBase[ws_currentTile&0x1f];
				ws_currentTile++;
				char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
													tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
				INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
				

				for (int i=0;i<columnInTile;i++)
				{
					if (*ws_tileRow)	
						*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
					scanlinePtr++; 
					ws_tileRow++;
				}
			}
		}
		else
		{
			// render the first clipped tile
			if (columnInTile)
			{
				UINT16	tileInfo=ws_bgScrollRamBase[ws_currentTile&0x1f];
				ws_currentTile++;
				char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
													tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
				
				INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
				ws_tileRow+=columnInTile;

				if ((tileInfo>>9)&0x04)
				{
					for (int i=columnInTile;i<8;i++)
					{
						if (*ws_tileRow)	
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
				else
				{
					for (int i=columnInTile;i<8;i++)
					{
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
			int nbTiles=28;
			if (columnInTile)
				nbTiles=27;
			
			for (int i=0;i<nbTiles;i++)
			{
				UINT16	tileInfo=ws_bgScrollRamBase[ws_currentTile&0x1f];
				ws_currentTile++;
				char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
													tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
				INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
				
				if ((tileInfo>>9)&0x04)
				{
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
				}
				else
				{
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
				}

			}

			// render the last clipped tile
			if (columnInTile)
			{
				UINT16	tileInfo=ws_bgScrollRamBase[ws_currentTile&0x1f];
				ws_currentTile++;
				char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
													tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
				INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
				

				if ((tileInfo>>9)&0x04)
				{
					for (int i=0;i<columnInTile;i++)
					{
						if (*ws_tileRow)	
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
				else
				{
					for (int i=0;i<columnInTile;i++)
					{
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
		}
	}
#ifdef STATISTICS	
	ws_background_rendering_time=ticker();
#endif
	// render sprites which are between both layers
	if (ws_ioRam[0x00]&0x04)
	{
		int ws_sprWindow_x0=ws_ioRam[0x0c];
		int ws_sprWindow_y0=ws_ioRam[0x0d];
		int ws_sprWindow_x1=ws_ioRam[0x0e];
		int ws_sprWindow_y1=ws_ioRam[0x0f];
		UINT32	*ws_sprRamBase=(UINT32*)(internalRam+(((UINT32)ws_ioRam[0x04])<<9));
		
		// seek to first sprite
		ws_sprRamBase+=ws_ioRam[0x06]-1;

		for (int i=ws_ioRam[0x06];i>ws_ioRam[0x05];i--)
		{
			UINT32 spr=*ws_sprRamBase--;

			if (!(spr&0x2000))
			{
				// sprite window on ?
				if ((ws_ioRam[0x00]&0x08)&&(spr&0x1000)&&(ws_sprWindow_x0!=ws_sprWindow_x1))
				{
					ws_drawClippedSpriteLine(framebuffer,ws_gpu_scanline,(spr&0xff000000)>>24, (spr&0x00ff0000)>>16,
										 spr&0x1ff,8+((spr&0xe00)>>9),spr&0x4000,spr&0x8000,
										 ws_sprWindow_x0,ws_sprWindow_y0,ws_sprWindow_x1,ws_sprWindow_y1);
				}
				else
				{
					ws_drawClippedSpriteLine(framebuffer,ws_gpu_scanline,(spr&0xff000000)>>24, (spr&0x00ff0000)>>16,
										 spr&0x1ff,8+((spr&0xe00)>>9),spr&0x4000,spr&0x8000,
										 0,0,224,144);
				}
			}
		}
	}
#ifdef STATISTICS	
	ws_priority_0_sprites_rendering_time=ticker();
#endif	
	// render foreground layer
	if (ws_ioRam[0x00]&0x02)
	{
		int ws_fgWindow_x0=ws_ioRam[0x08];
		int ws_fgWindow_x1=ws_ioRam[0x0a];
		int ws_fgScroll_x=ws_ioRam[0x12];
		int ws_fgScroll_y=ws_ioRam[0x13];

		int windowMode=ws_ioRam[0x00]&0x30;
				
		// seek to the first tile
		ws_fgScroll_y=(ws_fgScroll_y+ws_gpu_scanline)&0xff;

		// note: byte ordering assumptions!
		int	ws_currentTile=(ws_fgScroll_x>>3);
		UINT16	*ws_fgScrollRamBase=(UINT16*)(internalRam+(((UINT32)ws_ioRam[0x07]&0xf0)<<7)+
									((ws_fgScroll_y&0xfff8)<<3));
		
		int	lineInTile   = ws_fgScroll_y&0x07;
		int columnInTile = ws_fgScroll_x&0x07;
	
		INT16	*scanlinePtr=framebuffer;
		

		// window disabled
		if (!windowMode)
		{
			if (ws_gpu_operatingInColor)
			{
				// render the first clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					
					ws_tileRow+=columnInTile;

					for (int i=columnInTile;i<8;i++)
					{
						if (*ws_tileRow)	
							*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
						scanlinePtr++; 
						ws_tileRow++;
					}
				}

				// render the tiles between them
				int nbTiles=28;
				if (columnInTile)
					nbTiles=27;
				
				for (int i=0;i<nbTiles;i++)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					

					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
					if (*ws_tileRow) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++;
				}

				// render the last clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					

					for (int i=0;i<columnInTile;i++)
					{
						if (*ws_tileRow)	
							*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
			else
			{
				// render the first clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					ws_tileRow+=columnInTile;
					if ((tileInfo>>9)&0x04)
					{
						for (int i=columnInTile;i<8;i++)
						{
							if (*ws_tileRow)	
								*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
							scanlinePtr++; 
							ws_tileRow++;
						}
					}
					else
					{
						for (int i=columnInTile;i<8;i++)
						{
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
							scanlinePtr++; 
							ws_tileRow++;
						}
					}
				}
				int nbTiles=28;
				if (columnInTile)
					nbTiles=27;
				
				for (int i=0;i<nbTiles;i++)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					
					if ((tileInfo>>9)&0x04)
					{
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						if (*ws_tileRow)	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					}
					else
					{
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
						*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++;
					}
				}

				// render the last clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					

					if ((tileInfo>>9)&0x04)
					{
						for (int i=0;i<columnInTile;i++)
						{
							if (*ws_tileRow)	
								*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
							scanlinePtr++; 
							ws_tileRow++;
						}
					}
					else
					{
						for (int i=0;i<columnInTile;i++)
						{
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
							scanlinePtr++; 
							ws_tileRow++;
						}
					}
				}
			}
		}
		else
		// foreground layer displayed only inside the window
		if (windowMode==0x20)
		{
			int column=0;
			if (ws_gpu_operatingInColor)
			{
				// render the first clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					
					ws_tileRow+=columnInTile;

					for (int i=columnInTile;i<8;i++)
					{
						if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	
							*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}

				// render the tiles between them
				int nbTiles=28;
				if (columnInTile)
					nbTiles=27;
				
				for (int i=0;i<nbTiles;i++)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					

					
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1)) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
				}

				// render the last clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					

					for (int i=0;i<columnInTile;i++)
					{
						if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	
							*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
			else
			{
				// render the first clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					ws_tileRow+=columnInTile;

					for (int i=columnInTile;i<8;i++)
					{
						if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
				int nbTiles=28;
				if (columnInTile)
					nbTiles=27;
				
				for (int i=0;i<nbTiles;i++)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					

					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
				}

				// render the last clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					

					for (int i=0;i<columnInTile;i++)
					{
						if ((*ws_tileRow)&&(column>=ws_fgWindow_x0)&&(column<=ws_fgWindow_x1))	
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
		}
		else
		// foreground layer displayed only outside the window
		if (windowMode==0x30)
		{
			int column=0;
			if (ws_gpu_operatingInColor)
			{
				// render the first clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					
					ws_tileRow+=columnInTile;

					for (int i=columnInTile;i<8;i++)
					{
						if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	
							*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}

				// render the tiles between them
				int nbTiles=28;
				if (columnInTile)
					nbTiles=27;
				
				for (int i=0;i<nbTiles;i++)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					

					
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1))) *scanlinePtr=wsc_paletteAlias[*ws_tileRow]; scanlinePtr++;	ws_tileRow++; column++;
				}

				// render the last clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*wsc_paletteAlias=&wsc_palette[((tileInfo>>9)&0x0f)<<4];
					

					for (int i=0;i<columnInTile;i++)
					{
						if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	
							*scanlinePtr=wsc_paletteAlias[*ws_tileRow]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
			else
			{
				// render the first clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					ws_tileRow+=columnInTile;

					for (int i=columnInTile;i<8;i++)
					{
						if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
				int nbTiles=28;
				if (columnInTile)
					nbTiles=27;
				
				for (int i=0;i<nbTiles;i++)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile, tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
					if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; scanlinePtr++; ws_tileRow++; column++;
				}

				// render the last clipped tile
				if (columnInTile)
				{
					UINT16	tileInfo=ws_fgScrollRamBase[ws_currentTile&0x1f];
					ws_currentTile++;
					char	*ws_tileRow=ws_tileCache_getTileRow(	tileInfo&0x1ff, lineInTile,
														tileInfo&0x8000, tileInfo&0x4000, tileInfo&0x2000);
					INT16	*ws_paletteAlias=&ws_palette[((tileInfo>>9)&0x0f)<<2];
					

					for (int i=0;i<columnInTile;i++)
					{
						if ((*ws_tileRow)&&((column<ws_fgWindow_x0)||(column>ws_fgWindow_x1)))	
							*scanlinePtr=ws_shades[ws_paletteColors[ws_paletteAlias[*ws_tileRow]]]; 
						column++;
						scanlinePtr++; 
						ws_tileRow++;
					}
				}
			}
		}
		else
		{
			// unknown
		}
	}
#ifdef STATISTICS	
	ws_foreground_rendering_time=ticker();
#endif
	// render sprites
	if (ws_ioRam[0x00]&0x04)
	{
		int ws_sprWindow_x0=ws_ioRam[0x0c];
		int ws_sprWindow_y0=ws_ioRam[0x0d];
		int ws_sprWindow_x1=ws_ioRam[0x0e];
		int ws_sprWindow_y1=ws_ioRam[0x0f];
		UINT32	*ws_sprRamBase=(UINT32*)(internalRam+(((UINT32)ws_ioRam[0x04])<<9));

		// seek to first sprite
		ws_sprRamBase+=ws_ioRam[0x06]-1;

		for (int i=ws_ioRam[0x06];i>ws_ioRam[0x05];i--)
		{
			UINT32 spr=*ws_sprRamBase--;
			
			if (spr&0x2000)
			{
				// sprite window on ?
				if ((ws_ioRam[0x00]&0x08)&&(spr&0x1000)&&(ws_sprWindow_x0!=ws_sprWindow_x1))
				{
					ws_drawClippedSpriteLine(framebuffer,ws_gpu_scanline,(spr&0xff000000)>>24, (spr&0x00ff0000)>>16,
										 spr&0x1ff,8+((spr&0xe00)>>9),spr&0x4000,spr&0x8000,
										 ws_sprWindow_x0,ws_sprWindow_y0,ws_sprWindow_x1,ws_sprWindow_y1);
				}
				else
				{
					ws_drawClippedSpriteLine(framebuffer,ws_gpu_scanline,(spr&0xff000000)>>24, (spr&0x00ff0000)>>16,
										 spr&0x1ff,8+((spr&0xe00)>>9),spr&0x4000,spr&0x8000,
										 0,0,224,144);
				}
			}
		}
	}
#ifdef STATISTICS	
	ws_priority_1_sprites_rendering_time=ticker();

	ws_priority_1_sprites_rendering_time-=ws_foreground_rendering_time;
	ws_foreground_rendering_time-=ws_priority_0_sprites_rendering_time;
	ws_priority_0_sprites_rendering_time-=ws_background_rendering_time;
	ws_background_rendering_time-=ws_background_color_rendering_time;
	ws_background_color_rendering_time-=startTime;
#endif
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
void ws_gpu_write_byte(UINT32 offset, UINT8 value)
{
	// ws 4 color tiles
	if ((offset>=0x2000)&&(offset<0x4000))
	{
		if (internalRam[offset]!=value)
			ws_modified_tile[(offset&0x1fff)>>4]=1;
		// update the ram
		internalRam[offset]=value;
	}
	if (ws_gpu_operatingInColor)
	{
		// wsc 16 color tiles bank 0
		if ((offset>=0x4000)&&(offset<0x8000))
		{
			if (internalRam[offset]!=value)
				wsc_modified_tile[(offset&0x3fff)>>5]=1;
		}
		else
		// wsc 16 color tiles bank 1
		if ((offset>=0x8000)&&(offset<0xC000))
		{
			if (internalRam[offset]!=value)
				wsc_modified_tile[512+((offset&0x3fff)>>5)]=1;
		}

		// update the ram
		internalRam[offset]=value;
		// palette ram
		if (offset>=0xfe00)
		{
			// RGB444 format
			UINT16	color=(internalRam[(offset&0xfffe)+1]);
			color<<=8;
			color|=(internalRam[(offset&0xfffe)]);

			wsc_palette[(offset&0x1ff)>>1]=O_RGB555(((color>>8)&0x0f)<<1,((color>>4)&0x0f)<<1,(color&0x0f)<<1);				
		}
	}
	else
	if (offset<0x4000)
		internalRam[offset]=value;	
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
unsigned int ws_gpu_unknownPort;
void ws_gpu_port_write(UINT32 port,UINT8 value)
{
	ws_gpu_unknownPort=0;
	switch (port)
	{
	case 0x60:	ws_gpu_changeVideoMode(value);
				return;
	case 0x1C:	ws_paletteColors[0]=value&0xf;
				ws_paletteColors[1]=(value>>4)&0xf;
				return;
	case 0x1D:	ws_paletteColors[2]=value&0xf;
				ws_paletteColors[3]=(value>>4)&0xf;
				return;
	case 0x1E:	ws_paletteColors[4]=value&0xf;
				ws_paletteColors[5]=(value>>4)&0xf;
				return;
	case 0x1F:	ws_paletteColors[6]=value&0xf;
				ws_paletteColors[7]=(value>>4)&0xf;
				return;
	default:	ws_gpu_unknownPort=1;
	}
	if ((port>=0x20)&&(port<=0x3f))
	{
		ws_gpu_unknownPort=0;
		port-=0x20;
		int paletteIndex=port>>1;
		if (port&0x01)
		{
			ws_palette[(paletteIndex<<2)+2]=value&0x7; 
			ws_palette[(paletteIndex<<2)+3]=(value>>4)&0x7;
		}
		else
		{
			ws_palette[(paletteIndex<<2)+0]=value&0x7; 
			ws_palette[(paletteIndex<<2)+1]=(value>>4)&0x7;
		}
	}
}
////////////////////////////////////////////////////////////////////////////////
//
////////////////////////////////////////////////////////////////////////////////
//
//
//
//
//
//
//
////////////////////////////////////////////////////////////////////////////////
UINT8 ws_gpu_port_read(UINT8 port)
{
	if (port==0xa0)
	{
		if (ws_gpu_forceColorSystemBool)
			return ws_ioRam[0xa0]|2;
		else
		if (ws_gpu_forceMonoSystemBool)
			return ws_ioRam[0xa0]&(~0x02);
		else
		{
			if (ws_gpu_operatingInColor) 
				return ws_ioRam[0xa0]|2; 
			else 
				return ws_ioRam[0xa0]&(~0x02);
		}
	}
	return(ws_ioRam[port]);
}