/******************************************************************************* Dr. Micro (c) 1983 Sanritsu Video hardware driver by Uki *******************************************************************************/ #include "emu.h" #include "includes/drmicro.h" /****************************************************************************/ WRITE8_HANDLER( drmicro_videoram_w ) { drmicro_state *state = space->machine().driver_data(); state->m_videoram[offset] = data; if (offset < 0x800) tilemap_mark_tile_dirty(state->m_bg2, (offset & 0x3ff)); else tilemap_mark_tile_dirty(state->m_bg1, (offset & 0x3ff)); } /****************************************************************************/ static TILE_GET_INFO( get_bg1_tile_info ) { drmicro_state *state = machine.driver_data(); int code, col, flags; code = state->m_videoram[tile_index + 0x0800]; col = state->m_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 ) { drmicro_state *state = machine.driver_data(); int code, col, flags; code = state->m_videoram[tile_index + 0x0000]; col = state->m_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; /* allocate the colortable */ machine.colortable = colortable_alloc(machine, 0x20); /* create a lookup table for the palette */ for (i = 0; i < 0x20; i++) { int bit0, bit1, bit2; int 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] >> 3) & 0x01; bit1 = (color_prom[i] >> 4) & 0x01; bit2 = (color_prom[i] >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* blue component */ bit0 = 0; bit1 = (color_prom[i] >> 6) & 0x01; bit2 = (color_prom[i] >> 7) & 0x01; b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; colortable_palette_set_color(machine.colortable, i, MAKE_RGB(r, g, b)); } /* color_prom now points to the beginning of the lookup table */ color_prom += 0x20; for (i = 0; i < 0x200; i++) { UINT8 ctabentry = color_prom[i] & 0x0f; colortable_entry_set_value(machine.colortable, i, ctabentry); } } VIDEO_START( drmicro) { drmicro_state *state = machine.driver_data(); state->m_videoram = auto_alloc_array(machine, UINT8, 0x1000); state->save_pointer(NAME(state->m_videoram), 0x1000); state->m_bg1 = tilemap_create(machine, get_bg1_tile_info, tilemap_scan_rows, 8, 8, 32, 32); state->m_bg2 = tilemap_create(machine, get_bg2_tile_info, tilemap_scan_rows, 8, 8, 32, 32); tilemap_set_transparent_pen(state->m_bg2, 0); } SCREEN_UPDATE( drmicro ) { drmicro_state *state = screen->machine().driver_data(); int offs, adr, g; int chr, col, attr; int x, y, fx, fy; tilemap_draw(bitmap, cliprect, state->m_bg1, 0, 0); tilemap_draw(bitmap, cliprect, state->m_bg2, 0, 0); /* draw sprites */ for (g = 0; g < 2; g++) { adr = 0x800 * g; for (offs = 0x00; offs < 0x20; offs += 4) { x = state->m_videoram[offs + adr + 3]; y = state->m_videoram[offs + adr + 0]; attr = state->m_videoram[offs + adr + 2]; chr = state->m_videoram[offs + adr + 1]; fx = (chr & 0x01) ^ state->m_flipscreen; fy = ((chr & 0x02) >> 1) ^ state->m_flipscreen; chr = (chr >> 2) | (attr & 0xc0); col = (attr & 0x0f) + 0x00; if (!state->m_flipscreen) y = (240 - y) & 0xff; else x = (240 - x) & 0xff; drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[3-g], chr, col, fx,fy, x,y,0); if (x > 240) { drawgfx_transpen(bitmap,cliprect,screen->machine().gfx[3-g], chr, col, fx,fy, x-256,y,0); } } } return 0; }