text: #include "driver.h"
  
  static tilemap *bg_tilemap;
  
  PALETTE_INIT( pcktgal )
  {
  	int i;
  
  	for (i = 0;i < machine->drv->total_colors;i++)
  	{
  		int bit0,bit1,bit2,bit3,r,g,b;
  
  		bit0 = (color_prom[i] >> 0) & 0x01;
  		bit1 = (color_prom[i] >> 1) & 0x01;
  		bit2 = (color_prom[i] >> 2) & 0x01;
  		bit3 = (color_prom[i] >> 3) & 0x01;
  		r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
  		bit0 = (color_prom[i] >> 4) & 0x01;
  		bit1 = (color_prom[i] >> 5) & 0x01;
  		bit2 = (color_prom[i] >> 6) & 0x01;
  		bit3 = (color_prom[i] >> 7) & 0x01;
  		g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
  		bit0 = (color_prom[i + machine->drv->total_colors] >> 0) & 0x01;
  		bit1 = (color_prom[i + machine->drv->total_colors] >> 1) & 0x01;
  		bit2 = (color_prom[i + machine->drv->total_colors] >> 2) & 0x01;
  		bit3 = (color_prom[i + machine->drv->total_colors] >> 3) & 0x01;
  		b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
  
  		palette_set_color(machine,i,MAKE_RGB(r,g,b));
  	}
  }
  
  WRITE8_HANDLER( pcktgal_videoram_w )
  {
  	videoram[offset] = data;
  	tilemap_mark_tile_dirty(bg_tilemap, offset / 2);
  }
  
  WRITE8_HANDLER( pcktgal_flipscreen_w )
  {
  	if (flip_screen != (data & 0x80))
  	{
  		flip_screen_set(data & 0x80);
  		tilemap_mark_all_tiles_dirty(ALL_TILEMAPS);
  	}
  }
  
  static TILE_GET_INFO( get_bg_tile_info )
  {
  	int code = videoram[tile_index*2+1] + ((videoram[tile_index*2] & 0x0f) << 8);
  	int color = videoram[tile_index*2] >> 4;
  
  	SET_TILE_INFO(0, code, color, 0);
  }
  
  VIDEO_START( pcktgal )
  {
  	bg_tilemap = tilemap_create(get_bg_tile_info, tilemap_scan_rows,
  		TILEMAP_TYPE_PEN, 8, 8, 32, 32);
  }
  
  static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect)
  {
  	int offs;
  
  	for (offs = 0;offs < spriteram_size;offs += 4)
  	{
  		if (spriteram[offs] != 0xf8)
  		{
  			int sx,sy,flipx,flipy;
  
  
  			sx = 240 - spriteram[offs+2];
  			sy = 240 - spriteram[offs];
  
  			flipx = spriteram[offs+1] & 0x04;
  			flipy = spriteram[offs+1] & 0x02;
  			if (flip_screen) {
  				sx=240-sx;
  				sy=240-sy;
  				if (flipx) flipx=0; else flipx=1;
  				if (flipy) flipy=0; else flipy=1;
  			}
  
  			drawgfx(bitmap,machine->gfx[1],
  					spriteram[offs+3] + ((spriteram[offs+1] & 1) << 8),
  					(spriteram[offs+1] & 0x70) >> 4,
  					flipx,flipy,
  					sx,sy,
  					cliprect,TRANSPARENCY_PEN,0);
  		}
  	}
  }
  
  VIDEO_UPDATE( pcktgal )
  {
  	tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
  	draw_sprites(machine, bitmap, cliprect);
  	return 0;
  }
  