#include "driver.h" #include "video/konamiic.h" static int zoom_colorbase[2],road_colorbase[2],sprite_colorbase; /*************************************************************************** Callbacks for the K053247 ***************************************************************************/ static void overdriv_sprite_callback(int *code,int *color,int *priority_mask) { int pri = (*color & 0xffe0) >> 5; /* ??????? */ if (pri) *priority_mask = 0x02; else *priority_mask = 0x00; *color = sprite_colorbase + (*color & 0x001f); } /*************************************************************************** Callbacks for the K051316 ***************************************************************************/ static void zoom_callback_0(int *code,int *color,int *flags) { *flags = (*color & 0x40) ? TILE_FLIPX : 0; *code |= ((*color & 0x03) << 8); *color = zoom_colorbase[0] + ((*color & 0x3c) >> 2); } static void zoom_callback_1(int *code,int *color,int *flags) { *flags = (*color & 0x40) ? TILE_FLIPX : 0; *code |= ((*color & 0x03) << 8); *color = zoom_colorbase[1] + ((*color & 0x3c) >> 2); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ VIDEO_START( overdriv ) { K053251_vh_start(); K051316_vh_start_0(machine,REGION_GFX2,4,TRUE,0,zoom_callback_0); K051316_vh_start_1(machine,REGION_GFX3,4,FALSE,0,zoom_callback_1); K053247_vh_start(machine, REGION_GFX1,77,22,NORMAL_PLANE_ORDER,overdriv_sprite_callback); K051316_wraparound_enable(0,1); K051316_set_offset(0,14,-1); K051316_set_offset(1,15,0); } /*************************************************************************** Display refresh ***************************************************************************/ VIDEO_UPDATE( overdriv ) { sprite_colorbase = K053251_get_palette_index(K053251_CI0); road_colorbase[1] = K053251_get_palette_index(K053251_CI1); road_colorbase[0] = K053251_get_palette_index(K053251_CI2); zoom_colorbase[1] = K053251_get_palette_index(K053251_CI3); zoom_colorbase[0] = K053251_get_palette_index(K053251_CI4); fillbitmap(priority_bitmap,0,cliprect); K051316_zoom_draw_0(bitmap,cliprect,0,0); K051316_zoom_draw_1(bitmap,cliprect,0,1); K053247_sprites_draw(machine, bitmap,cliprect); return 0; }