/*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/commando.h" WRITE8_HANDLER( commando_videoram_w ) { commando_state *state = space->machine().driver_data(); state->m_videoram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( commando_colorram_w ) { commando_state *state = space->machine().driver_data(); state->m_colorram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( commando_videoram2_w ) { commando_state *state = space->machine().driver_data(); state->m_videoram2[offset] = data; tilemap_mark_tile_dirty(state->m_fg_tilemap, offset); } WRITE8_HANDLER( commando_colorram2_w ) { commando_state *state = space->machine().driver_data(); state->m_colorram2[offset] = data; tilemap_mark_tile_dirty(state->m_fg_tilemap, offset); } WRITE8_HANDLER( commando_scrollx_w ) { commando_state *state = space->machine().driver_data(); state->m_scroll_x[offset] = data; tilemap_set_scrollx(state->m_bg_tilemap, 0, state->m_scroll_x[0] | (state->m_scroll_x[1] << 8)); } WRITE8_HANDLER( commando_scrolly_w ) { commando_state *state = space->machine().driver_data(); state->m_scroll_y[offset] = data; tilemap_set_scrolly(state->m_bg_tilemap, 0, state->m_scroll_y[0] | (state->m_scroll_y[1] << 8)); } WRITE8_HANDLER( commando_c804_w ) { commando_state *state = space->machine().driver_data(); // bits 0 and 1 are coin counters coin_counter_w(space->machine(), 0, data & 0x01); coin_counter_w(space->machine(), 1, data & 0x02); // bit 4 resets the sound CPU device_set_input_line(state->m_audiocpu, INPUT_LINE_RESET, (data & 0x10) ? ASSERT_LINE : CLEAR_LINE); // bit 7 flips screen flip_screen_set(space->machine(), data & 0x80); } static TILE_GET_INFO( get_bg_tile_info ) { commando_state *state = machine.driver_data(); int attr = state->m_colorram[tile_index]; int code = state->m_videoram[tile_index] + ((attr & 0xc0) << 2); int color = attr & 0x0f; int flags = TILE_FLIPYX((attr & 0x30) >> 4); SET_TILE_INFO(1, code, color, flags); } static TILE_GET_INFO( get_fg_tile_info ) { commando_state *state = machine.driver_data(); int attr = state->m_colorram2[tile_index]; int code = state->m_videoram2[tile_index] + ((attr & 0xc0) << 2); int color = attr & 0x0f; int flags = TILE_FLIPYX((attr & 0x30) >> 4); SET_TILE_INFO(0, code, color, flags); } VIDEO_START( commando ) { commando_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_cols, 16, 16, 32, 32); state->m_fg_tilemap = tilemap_create(machine, get_fg_tile_info, tilemap_scan_rows, 8, 8, 32, 32); tilemap_set_transparent_pen(state->m_fg_tilemap, 3); } static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { UINT8 *buffered_spriteram = machine.generic.buffered_spriteram.u8; int offs; for (offs = machine.generic.spriteram_size - 4; offs >= 0; offs -= 4) { // bit 1 of attr is not used int attr = buffered_spriteram[offs + 1]; int bank = (attr & 0xc0) >> 6; int code = buffered_spriteram[offs] + 256 * bank; int color = (attr & 0x30) >> 4; int flipx = attr & 0x04; int flipy = attr & 0x08; int sx = buffered_spriteram[offs + 3] - ((attr & 0x01) << 8); int sy = buffered_spriteram[offs + 2]; if (flip_screen_get(machine)) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } if (bank < 3) drawgfx_transpen(bitmap, cliprect, machine.gfx[2], code, color, flipx, flipy, sx, sy, 15); } } SCREEN_UPDATE( commando ) { commando_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); draw_sprites(screen->machine(), bitmap, cliprect); tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0); return 0; } SCREEN_EOF( commando ) { address_space *space = machine.device("maincpu")->memory().space(AS_PROGRAM); buffer_spriteram_w(space, 0, 0); }