// license:BSD-3-Clause // copyright-holders:Pierpaolo Prazzoli, David Haywood /* Cross Pang video hardware emulation -- this seems to be the same as the tumblepop bootleg based hardware in tumbleb.c */ #include "emu.h" #include "includes/crospang.h" WRITE16_MEMBER(crospang_state::bestri_tilebank_w) { m_bestri_tilebank = (data>>10) & 0xf; //printf("bestri %04x\n", data); m_fg_layer->mark_all_dirty(); m_bg_layer->mark_all_dirty(); } // Bestri performs some unusual operations on the scroll values before writing them WRITE16_MEMBER(crospang_state::bestri_bg_scrolly_w) { // addi.w #$1f8, D0 // eori.w #$154, D0 int scroll = (data & 0x3ff) ^ 0x0155; m_bg_layer->set_scrolly(0, -scroll + 7); } WRITE16_MEMBER(crospang_state::bestri_fg_scrolly_w) { // addi.w #$1f8, D0 // eori.w #$aa, D0 int scroll = (data & 0x3ff) ^ 0x00ab; m_fg_layer->set_scrolly(0, -scroll + 7); } WRITE16_MEMBER(crospang_state::bestri_fg_scrollx_w) { // addi.w #$400, D1 // eori.w #$1e0, D1 int scroll = (data & 0x3ff) ^ 0x1e1; m_fg_layer->set_scrollx(0, scroll - 1); } WRITE16_MEMBER(crospang_state::bestri_bg_scrollx_w) { // addi.w #$3fc, D1 // eori.w #$3c0, D1 int scroll = (data & 0x3ff) ^ 0x3c1; m_bg_layer->set_scrollx(0, scroll + 3); } WRITE16_MEMBER(crospang_state::crospang_fg_scrolly_w) { m_fg_layer->set_scrolly(0, data + 8); } WRITE16_MEMBER(crospang_state::crospang_bg_scrolly_w) { m_bg_layer->set_scrolly(0, data + 8); } WRITE16_MEMBER(crospang_state::crospang_fg_scrollx_w) { m_fg_layer->set_scrollx(0, data); } WRITE16_MEMBER(crospang_state::crospang_bg_scrollx_w) { m_bg_layer->set_scrollx(0, data + 4); } WRITE16_MEMBER(crospang_state::crospang_fg_videoram_w) { COMBINE_DATA(&m_fg_videoram[offset]); m_fg_layer->mark_tile_dirty(offset); } WRITE16_MEMBER(crospang_state::crospang_bg_videoram_w) { COMBINE_DATA(&m_bg_videoram[offset]); m_bg_layer->mark_tile_dirty(offset); } TILE_GET_INFO_MEMBER(crospang_state::get_bg_tile_info) { int data = m_bg_videoram[tile_index]; int tile = data & 0xfff; int color = (data >> 12) & 0x0f; SET_TILE_INFO_MEMBER(1, tile + m_bestri_tilebank * 0x1000, color + 0x20, 0); } TILE_GET_INFO_MEMBER(crospang_state::get_fg_tile_info) { int data = m_fg_videoram[tile_index]; int tile = data & 0xfff; int color = (data >> 12) & 0x0f; SET_TILE_INFO_MEMBER(1, tile + m_bestri_tilebank * 0x1000, color + 0x10, 0); } void crospang_state::video_start() { m_bg_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(crospang_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 16, 16, 32, 32); m_fg_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(crospang_state::get_fg_tile_info),this), TILEMAP_SCAN_ROWS, 16, 16, 32, 32); m_fg_layer->set_transparent_pen(0); } uint32_t crospang_state::screen_update_crospang(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_layer->draw(screen, bitmap, cliprect, 0, 0); m_fg_layer->draw(screen, bitmap, cliprect, 0, 0); m_sprgen->draw_sprites(bitmap, cliprect, m_spriteram, 0x400); return 0; }