/*************************************************************************** Lasso and similar hardware driver by Phil Stroffolino, Nicola Salmoria, Luca Elia Every game has 1 256 x 256 tilemap (non scrollable) made of 8 x 8 tiles, and 16 x 16 sprites (some games use 32, some more). The graphics for tiles and sprites are held inside the same ROMs, but aren't shared between the two: the first $100 tiles are for the tilemap, the following $100 are for sprites. This constitutes the first graphics bank. There can be several. Lasso has an additional pixel layer (256 x 256 x 1) and a third CPU devoted to drawing into it (the lasso!) Wwjgtin has an additional $800 x $400 scrolling tilemap in ROM and $100 more 16 x 16 x 4 tiles for it. The colors are static ($40 colors, 2 PROMs) but the background color can be changed at runtime. Wwjgtin can change the last 4 colors (= last palette) too. ***************************************************************************/ #include "driver.h" #include "lasso.h" UINT8 *lasso_videoram; UINT8 *lasso_colorram; UINT8 *lasso_spriteram; size_t lasso_spriteram_size; UINT8 *lasso_bitmap_ram; /* 0x2000 bytes for a 256 x 256 x 1 bitmap */ UINT8 *wwjgtin_track_scroll; /* variables only used here: */ static tilemap *bg_tilemap, *track_tilemap; static UINT8 gfxbank; /* used by lasso, chameleo, wwjgtin and pinbo */ static UINT8 wwjgtin_track_enable; /* used by wwjgtin */ /*************************************************************************** Colors (BBGGGRRR) ***************************************************************************/ static void lasso_set_color(int i, int data) { int bit0,bit1,bit2,r,g,b; /* red component */ bit0 = (data >> 0) & 0x01; bit1 = (data >> 1) & 0x01; bit2 = (data >> 2) & 0x01; r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* green component */ bit0 = (data >> 3) & 0x01; bit1 = (data >> 4) & 0x01; bit2 = (data >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* blue component */ bit0 = (data >> 6) & 0x01; bit1 = (data >> 7) & 0x01; b = 0x4f * bit0 + 0xa8 * bit1; palette_set_color( Machine,i,MAKE_RGB(r,g,b) ); } PALETTE_INIT( lasso ) { int i; for (i = 0;i < 0x40;i++) { lasso_set_color(i,*color_prom); color_prom++; } } /* 16 color tiles with a 4 color step for the palettes */ PALETTE_INIT( wwjgtin ) { int color, pen; palette_init_lasso(machine,colortable,color_prom); for( color = 0; color < 0x10; color++ ) for( pen = 0; pen < 16; pen++ ) colortable[color * 16 + pen + 4*16] = (color * 4 + pen) % 0x40; } /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ static TILE_GET_INFO( lasso_get_bg_tile_info ) { int code = lasso_videoram[tile_index]; int color = lasso_colorram[tile_index]; SET_TILE_INFO(0, code + ((UINT16)gfxbank << 8), color & 0x0f, 0); } static TILE_GET_INFO( wwjgtin_get_track_tile_info ) { UINT8 *ROM = memory_region(REGION_USER1); int code = ROM[tile_index]; int color = ROM[tile_index + 0x2000]; SET_TILE_INFO(2, code, color & 0x0f, 0); } static TILE_GET_INFO( pinbo_get_bg_tile_info ) { int code = lasso_videoram[tile_index]; int color = lasso_colorram[tile_index]; SET_TILE_INFO(0, code + ((color & 0x30) << 4), color & 0x0f, 0); } /************************************* * * Video system start * *************************************/ VIDEO_START( lasso ) { /* create tilemap */ bg_tilemap = tilemap_create(lasso_get_bg_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 32,32); /* register for saving */ state_save_register_global(gfxbank); } VIDEO_START( wwjgtin ) { /* create tilemaps */ bg_tilemap = tilemap_create(lasso_get_bg_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8, 8, 32, 32); track_tilemap = tilemap_create(wwjgtin_get_track_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 16,16, 0x80,0x40); tilemap_set_transparent_pen(bg_tilemap,0); /* register for saving */ state_save_register_global(gfxbank); state_save_register_global(wwjgtin_track_enable); } VIDEO_START( pinbo ) { /* create tilemap */ bg_tilemap = tilemap_create(pinbo_get_bg_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 32,32); /* register for saving */ state_save_register_global(gfxbank); } /************************************* * * Memory handlers * *************************************/ WRITE8_HANDLER( lasso_videoram_w ) { lasso_videoram[offset] = data; tilemap_mark_tile_dirty( bg_tilemap, offset ); } WRITE8_HANDLER( lasso_colorram_w ) { lasso_colorram[offset] = data; tilemap_mark_tile_dirty( bg_tilemap, offset ); } static WRITE8_HANDLER( lasso_flip_screen_w ) { /* don't know which is which, but they are always set together */ flip_screen_x = data & 0x01; flip_screen_y = data & 0x02; tilemap_set_flip(ALL_TILEMAPS, (flip_screen_x ? TILEMAP_FLIPX : 0) | (flip_screen_y ? TILEMAP_FLIPY : 0)); } WRITE8_HANDLER( lasso_video_control_w ) { int bank = (data & 0x04) >> 2; if (gfxbank != bank) { gfxbank = bank; tilemap_mark_all_tiles_dirty(ALL_TILEMAPS); } lasso_flip_screen_w(offset, data); } WRITE8_HANDLER( wwjgtin_video_control_w ) { int bank = ((data & 0x04) ? 0 : 1) + ((data & 0x10) ? 2 : 0); wwjgtin_track_enable = data & 0x08; if (gfxbank != bank) { gfxbank = bank; tilemap_mark_all_tiles_dirty(ALL_TILEMAPS); } lasso_flip_screen_w(offset, data); } WRITE8_HANDLER( pinbo_video_control_w ) { /* no need to dirty the tilemap -- only the sprites use the global bank */ gfxbank = (data & 0x0c) >> 2; lasso_flip_screen_w(offset, data); } /* The bg_tilemap color can be changed */ WRITE8_HANDLER( lasso_backcolor_w ) { int i; for( i=0; i<0x40; i+=4 ) /* stuff into color#0 of each palette */ lasso_set_color(i,data); } /* The last 4 color (= last palette) entries can be changed */ WRITE8_HANDLER( wwjgtin_lastcolor_w ) { lasso_set_color(0x3f - offset,data); } /************************************* * * Video update * *************************************/ static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect, int reverse ) { const UINT8 *finish, *source; int inc; if (reverse) { source = lasso_spriteram; finish = lasso_spriteram + lasso_spriteram_size; inc = 4; } else { source = lasso_spriteram + lasso_spriteram_size - 4; finish = lasso_spriteram - 4; inc = -4; } while( source != finish ) { int sx,sy,flipx,flipy; int code,color; sx = source[3]; sy = source[0]; flipx = source[1] & 0x40; flipy = source[1] & 0x80; if (flip_screen_x) { sx = 240 - sx; flipx = !flipx; } if (flip_screen_y) { flipy = !flipy; } else { sy = 240 - sy; } code = source[1] & 0x3f; color = source[2] & 0x0f; drawgfx(bitmap, machine->gfx[1], code | ((UINT16)gfxbank << 6), color, flipx, flipy, sx,sy, cliprect, TRANSPARENCY_PEN,0); source += inc; } } static void draw_lasso(running_machine *machine, mame_bitmap *bitmap) { const UINT8 *source = lasso_bitmap_ram; int x,y; pen_t pen = machine->pens[0x3f]; for (y = 0; y < 256; y++) { for (x = 0; x < 256; ) { UINT8 data = *source++; if (data) { int bit; for (bit = 0; bit < 8; bit++) { if (data & 0x80) { if (flip_screen_x) { if (flip_screen_y) *BITMAP_ADDR16(bitmap, 255-y, 255-x) = pen; else *BITMAP_ADDR16(bitmap, y, 255-x) = pen; } else { if (flip_screen_y) *BITMAP_ADDR16(bitmap, 255-y, x) = pen; else *BITMAP_ADDR16(bitmap, y, x) = pen; } } x++; data <<= 1; } } else { x += 8; } } } } VIDEO_UPDATE( lasso ) { tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); draw_lasso(machine, bitmap); draw_sprites(machine, bitmap, cliprect, 0); return 0; } VIDEO_UPDATE( chameleo ) { tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); draw_sprites(machine, bitmap, cliprect, 0); return 0; } VIDEO_UPDATE( wwjgtin ) { tilemap_set_scrollx(track_tilemap,0,wwjgtin_track_scroll[0] + wwjgtin_track_scroll[1]*256); tilemap_set_scrolly(track_tilemap,0,wwjgtin_track_scroll[2] + wwjgtin_track_scroll[3]*256); if (wwjgtin_track_enable) tilemap_draw(bitmap, cliprect, track_tilemap, 0, 0); else fillbitmap(bitmap, machine->pens[0x40], cliprect); // black draw_sprites(machine, bitmap, cliprect, 1); // reverse order tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); return 0; }