#include "driver.h"
extern UINT8 *xyonix_vidram;
static tilemap *xyonix_tilemap;
PALETTE_INIT( xyonix )
{
int i;
for (i = 0;i < machine->drv->total_colors;i++)
{
int bit0,bit1,bit2,r,g,b;
/* red component */
bit0 = (color_prom[i] >> 0) & 0x01;
bit1 = (color_prom[i] >> 1) & 0x01;
bit2 = (color_prom[i] >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (color_prom[i] >> 5) & 0x01;
bit1 = (color_prom[i] >> 6) & 0x01;
bit2 = (color_prom[i] >> 7) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = (color_prom[i] >> 3) & 0x01;
bit1 = (color_prom[i] >> 4) & 0x01;
b = 0x4f * bit0 + 0xa8 * bit1;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
}
}
static TILE_GET_INFO( get_xyonix_tile_info )
{
int tileno;
int attr = xyonix_vidram[tile_index+0x1000+1];
tileno = (xyonix_vidram[tile_index+1] << 0) | ((attr & 0x0f) << 8);
SET_TILE_INFO(0,tileno,attr >> 4,0);
}
WRITE8_HANDLER( xyonix_vidram_w )
{
xyonix_vidram[offset] = data;
tilemap_mark_tile_dirty(xyonix_tilemap,(offset-1)&0x0fff);
}
VIDEO_START(xyonix)
{
xyonix_tilemap = tilemap_create(get_xyonix_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 4, 8,80,32);
}
VIDEO_UPDATE(xyonix)
{
tilemap_draw(bitmap,cliprect,xyonix_tilemap,0,0);
return 0;
}