// license:BSD-3-Clause // copyright-holders:Nicola Salmoria, Ernesto Corvi #include "emu.h" #include "includes/iqblock.h" /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ TILE_GET_INFO_MEMBER(iqblock_state::get_bg_tile_info) { int code = m_bgvideoram[tile_index] + (m_bgvideoram[tile_index + 0x800] << 8); SET_TILE_INFO_MEMBER(0, code &(m_video_type ? 0x1fff : 0x3fff), m_video_type? (2*(code >> 13)+1) : (4*(code >> 14)+3), 0); } TILE_GET_INFO_MEMBER(iqblock_state::get_fg_tile_info) { int code = m_fgvideoram[tile_index]; SET_TILE_INFO_MEMBER(1, code & 0x7f, (code & 0x80) ? 3 : 0, 0); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ void iqblock_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(iqblock_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8,64,32); m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(iqblock_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS, 8,32,64, 8); m_bg_tilemap->set_transparent_pen(0); m_fg_tilemap->set_scroll_cols(64); save_item(NAME(m_videoenable)); } /*************************************************************************** Memory handlers ***************************************************************************/ WRITE8_MEMBER(iqblock_state::fgvideoram_w) { m_fgvideoram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(iqblock_state::bgvideoram_w) { m_bgvideoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset & 0x7ff); } WRITE8_MEMBER(iqblock_state::fgscroll_w) { m_fg_tilemap->set_scrolly(offset,data); } /*************************************************************************** Display refresh ***************************************************************************/ uint32_t iqblock_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { if (!m_videoenable) return 0; m_fg_tilemap->draw(screen, bitmap, cliprect, 0,0); m_bg_tilemap->draw(screen, bitmap, cliprect, 0,0); return 0; }