/******************************************************************************* Dr. Micro (c) 1983 Sanritsu Video hardware driver by Uki *******************************************************************************/ #include "driver.h" static int flipscreen; static UINT8 *drmicro_videoram; static tilemap *drmicro_bg1; static tilemap *drmicro_bg2; /****************************************************************************/ void drmicro_flip_w( int flip ) { flipscreen = flip ? 1 : 0; flip_screen_set(flip); } WRITE8_HANDLER( drmicro_videoram_w ) { drmicro_videoram[offset] = data; if (offset<0x800) tilemap_mark_tile_dirty(drmicro_bg2,(offset & 0x3ff)); else tilemap_mark_tile_dirty(drmicro_bg1,(offset & 0x3ff)); } READ8_HANDLER( drmicro_videoram_r ) { return drmicro_videoram[offset]; } /****************************************************************************/ static TILE_GET_INFO( get_bg1_tile_info ) { int code,col,flags; code = drmicro_videoram[tile_index + 0x0800]; col = drmicro_videoram[tile_index + 0x0c00]; code += (col & 0xc0) << 2; flags = ((col & 0x20) ? TILEMAP_FLIPY : 0) | ((col & 0x10) ? TILEMAP_FLIPX : 0); col &= 0x0f; SET_TILE_INFO( 0, code, col, flags); } static TILE_GET_INFO( get_bg2_tile_info ) { int code,col,flags; code = drmicro_videoram[tile_index + 0x0000]; col = drmicro_videoram[tile_index + 0x0400]; code += (col & 0xc0) << 2; flags = ((col & 0x20) ? TILEMAP_FLIPY : 0) | ((col & 0x10) ? TILEMAP_FLIPX : 0); col &= 0x0f; SET_TILE_INFO( 1, code, col, flags); } /****************************************************************************/ PALETTE_INIT( drmicro ) { int i; for (i = 0;i < machine->drv->total_colors;i++) { int bit0,bit1,bit2,r,g,b; bit0 = (*color_prom >> 0) & 0x01; bit1 = (*color_prom >> 1) & 0x01; bit2 = (*color_prom >> 2) & 0x01; r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; bit0 = (*color_prom >> 3) & 0x01; bit1 = (*color_prom >> 4) & 0x01; bit2 = (*color_prom >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; bit0 = 0; bit1 = (*color_prom >> 6) & 0x01; bit2 = (*color_prom >> 7) & 0x01; b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette_set_color(machine,i,MAKE_RGB(r,g,b)); color_prom++; } for (i=0; idrv->color_table_len; i++) colortable[i] = color_prom[i] & 0x0f; } VIDEO_START( drmicro) { drmicro_videoram = auto_malloc(0x1000); drmicro_bg1 = tilemap_create(get_bg1_tile_info, tilemap_scan_rows,TILEMAP_TYPE_PEN, 8,8,32,32); drmicro_bg2 = tilemap_create(get_bg2_tile_info, tilemap_scan_rows,TILEMAP_TYPE_PEN, 8,8,32,32); tilemap_set_transparent_pen(drmicro_bg2,0); } VIDEO_UPDATE( drmicro ) { int offs,adr,g; int chr,col,attr; int x,y,fx,fy; tilemap_draw(bitmap, cliprect, drmicro_bg1, 0, 0); tilemap_draw(bitmap, cliprect, drmicro_bg2, 0, 0); /* draw sprites */ for (g=0;g<2;g++) { adr = 0x800*g; for (offs=0x00; offs<0x20; offs +=4) { x = drmicro_videoram[offs + adr + 3]; y = drmicro_videoram[offs + adr + 0]; attr = drmicro_videoram[offs + adr + 2]; chr = drmicro_videoram[offs + adr + 1]; fx = (chr & 0x01) ^ flipscreen; fy = ((chr & 0x02) >> 1) ^ flipscreen; chr = (chr >> 2) | (attr & 0xc0); col = (attr & 0x0f) + 0x00; if (!flipscreen) y = (240-y) & 0xff; else x = (240-x) & 0xff; drawgfx(bitmap,machine->gfx[3-g], chr, col, fx,fy, x,y, cliprect,TRANSPARENCY_PEN,0); if (x>240) { drawgfx(bitmap,machine->gfx[3-g], chr, col, fx,fy, x-256,y, cliprect,TRANSPARENCY_PEN,0); } } } return 0; }