/*************************************************************************** Sega System 16B hardware ***************************************************************************/ #include "emu.h" #include "video/segaic16.h" #include "includes/segas16.h" /************************************* * * Video startup * *************************************/ static void video_start_common(running_machine &machine, int type) { /* compute palette info */ segaic16_palette_init(0x800); /* initialize the tile/text layers */ segaic16_tilemap_init(machine, 0, type, 0x000, 0, 2); } VIDEO_START( system16b ) { video_start_common(machine, SEGAIC16_TILEMAP_16B); } VIDEO_START( timscanr ) { video_start_common(machine, SEGAIC16_TILEMAP_16B_ALT); } /************************************* * * Video update * *************************************/ SCREEN_UPDATE( system16b ) { /* if no drawing is happening, fill with black and get out */ if (!segaic16_display_enable) { bitmap_fill(bitmap, cliprect, get_black_pen(screen->machine())); return 0; } /* reset priorities */ bitmap_fill(screen->machine().priority_bitmap, cliprect, 0); /* draw background opaquely first, not setting any priorities */ segaic16_tilemap_draw(screen, bitmap, cliprect, 0, SEGAIC16_TILEMAP_BACKGROUND, 0 | TILEMAP_DRAW_OPAQUE, 0x00); segaic16_tilemap_draw(screen, bitmap, cliprect, 0, SEGAIC16_TILEMAP_BACKGROUND, 1 | TILEMAP_DRAW_OPAQUE, 0x00); /* draw background again, just to set the priorities on non-transparent pixels */ segaic16_tilemap_draw(screen, NULL, cliprect, 0, SEGAIC16_TILEMAP_BACKGROUND, 0, 0x01); segaic16_tilemap_draw(screen, NULL, cliprect, 0, SEGAIC16_TILEMAP_BACKGROUND, 1, 0x02); /* draw foreground */ segaic16_tilemap_draw(screen, bitmap, cliprect, 0, SEGAIC16_TILEMAP_FOREGROUND, 0, 0x02); segaic16_tilemap_draw(screen, bitmap, cliprect, 0, SEGAIC16_TILEMAP_FOREGROUND, 1, 0x04); /* text layer */ segaic16_tilemap_draw(screen, bitmap, cliprect, 0, SEGAIC16_TILEMAP_TEXT, 0, 0x04); segaic16_tilemap_draw(screen, bitmap, cliprect, 0, SEGAIC16_TILEMAP_TEXT, 1, 0x08); /* draw the sprites */ segaic16_sprites_draw(screen, bitmap, cliprect, 0); return 0; }