#include "emu.h" #include "includes/iqblock.h" /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ static TILE_GET_INFO( get_bg_tile_info ) { iqblock_state *state = machine.driver_data(); int code = state->m_bgvideoram[tile_index] + (state->m_bgvideoram[tile_index + 0x800] << 8); SET_TILE_INFO( 0, code &(state->m_video_type ? 0x1fff : 0x3fff), state->m_video_type? (2*(code >> 13)+1) : (4*(code >> 14)+3), 0); } static TILE_GET_INFO( get_fg_tile_info ) { iqblock_state *state = machine.driver_data(); int code = state->m_fgvideoram[tile_index]; SET_TILE_INFO( 1, code & 0x7f, (code & 0x80) ? 3 : 0, 0); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ VIDEO_START( iqblock ) { iqblock_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info,tilemap_scan_rows, 8, 8,64,32); state->m_fg_tilemap = tilemap_create(machine, get_fg_tile_info,tilemap_scan_rows,8,32,64, 8); tilemap_set_transparent_pen(state->m_bg_tilemap,0); tilemap_set_scroll_cols(state->m_fg_tilemap,64); } /*************************************************************************** Memory handlers ***************************************************************************/ WRITE8_HANDLER( iqblock_fgvideoram_w ) { iqblock_state *state = space->machine().driver_data(); state->m_fgvideoram[offset] = data; tilemap_mark_tile_dirty(state->m_fg_tilemap,offset); } WRITE8_HANDLER( iqblock_bgvideoram_w ) { iqblock_state *state = space->machine().driver_data(); state->m_bgvideoram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap,offset & 0x7ff); } READ8_HANDLER( iqblock_bgvideoram_r ) { iqblock_state *state = space->machine().driver_data(); return state->m_bgvideoram[offset]; } WRITE8_HANDLER( iqblock_fgscroll_w ) { iqblock_state *state = space->machine().driver_data(); tilemap_set_scrolly(state->m_fg_tilemap,offset,data); } /*************************************************************************** Display refresh ***************************************************************************/ SCREEN_UPDATE( iqblock ) { iqblock_state *state = screen->machine().driver_data(); if (!state->m_videoenable) return 0; tilemap_draw(bitmap,cliprect,state->m_fg_tilemap,0,0); tilemap_draw(bitmap,cliprect,state->m_bg_tilemap,0,0); return 0; }