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/* Poke Champ */
#include "driver.h"
static tilemap *bg_tilemap;
WRITE8_HANDLER( pokechmp_videoram_w )
{
videoram[offset] = data;
tilemap_mark_tile_dirty(bg_tilemap, offset / 2);
}
WRITE8_HANDLER( pokechmp_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] & 0x3f) << 8);
int color = videoram[tile_index*2] >> 6;
SET_TILE_INFO(0, code, color, 0);
}
VIDEO_START( pokechmp )
{
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( pokechmp )
{
tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
draw_sprites(machine, bitmap, cliprect);
return 0;
}
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