// license:BSD-3-Clause // copyright-holders:Mirko Buffoni, Nicola Salmoria, Tomasz Slanina /*************************************************************************** video.c Functions to emulate the video hardware of the machine. ***************************************************************************/ #include "emu.h" #include "includes/superqix.h" /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ TILE_GET_INFO_MEMBER(hotsmash_state::pb_get_bg_tile_info) { int attr = m_videoram[tile_index + 0x400]; int code = m_videoram[tile_index] + 256 * (attr & 0x7); int color = (attr & 0xf0) >> 4; SET_TILE_INFO_MEMBER(0, code, color, 0); } TILE_GET_INFO_MEMBER(superqix_state_base::sqix_get_bg_tile_info) { int attr = m_videoram[tile_index + 0x400]; int bank = (attr & 0x04) ? 0 : 1; int code = m_videoram[tile_index] + 256 * (attr & 0x03); int color = (attr & 0xf0) >> 4; if (bank) code += 1024 * m_gfxbank; SET_TILE_INFO_MEMBER(bank, code, color, 0); tileinfo.group = (attr & 0x08) >> 3; } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ VIDEO_START_MEMBER(hotsmash_state, pbillian) { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(hotsmash_state::pb_get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8,32,32); } VIDEO_START_MEMBER(superqix_state_base, superqix) { m_fg_bitmap[0] = std::make_unique(256, 256); m_fg_bitmap[1] = std::make_unique(256, 256); m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(superqix_state_base::sqix_get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_bg_tilemap->set_transmask(0,0xffff,0x0000); /* split type 0 is totally transparent in front half */ m_bg_tilemap->set_transmask(1,0x0001,0xfffe); /* split type 1 has pen 0 transparent in front half */ save_item(NAME(*m_fg_bitmap[0])); save_item(NAME(*m_fg_bitmap[1])); } PALETTE_DECODER_MEMBER( superqix_state_base, BBGGRRII ) { uint8_t i = raw & 3; uint8_t r = (raw >> 0) & 0x0c; uint8_t g = (raw >> 2) & 0x0c; uint8_t b = (raw >> 4) & 0x0c; return rgb_t(pal4bit(r | i), pal4bit(g | i), pal4bit(b | i)); } /*************************************************************************** Memory handlers ***************************************************************************/ WRITE8_MEMBER(superqix_state_base::superqix_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset & 0x3ff); } WRITE8_MEMBER(superqix_state_base::superqix_bitmapram_w) { if (m_bitmapram[offset] != data) { int x = 2 * (offset % 128); int y = offset / 128 + 16; m_bitmapram[offset] = data; m_fg_bitmap[0]->pix16(y, x) = data >> 4; m_fg_bitmap[0]->pix16(y, x + 1) = data & 0x0f; } } WRITE8_MEMBER(superqix_state_base::superqix_bitmapram2_w) { if (data != m_bitmapram2[offset]) { int x = 2 * (offset % 128); int y = offset / 128 + 16; m_bitmapram2[offset] = data; m_fg_bitmap[1]->pix16(y, x) = data >> 4; m_fg_bitmap[1]->pix16(y, x + 1) = data & 0x0f; } } WRITE8_MEMBER(hotsmash_state::pbillian_0410_w) { /* -------0 ? [not used] ------1- coin counter 1 -----2-- coin counter 2 ----3--- rom 2 HI (reserved for ROM banking , not used) ---4---- nmi enable/disable --5----- flip screen */ if (data&0xc1) logerror("%04x: pbillian_0410_w with invalid bits: %02x\n",m_maincpu->pc(),data); machine().bookkeeping().coin_counter_w(0,BIT(data,1)); machine().bookkeeping().coin_counter_w(1,BIT(data,2)); membank("bank1")->set_entry(BIT(data,3)); m_nmi_mask = BIT(data,4); if (!(m_nmi_mask)) m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); flip_screen_set(BIT(data,5)); } WRITE8_MEMBER(superqix_state_base::superqix_0410_w) { /* ------10 tile bank -----2-- bitmap page select ----3--- nmi enable/disable --54---- rom bank */ if (data&0xc0) logerror("%04x: superqix_0410_w with invalid high bits: %02x\n",m_maincpu->pc(),data); /* bits 0-1 select the tile bank */ if (m_gfxbank != (data & 0x03)) { m_gfxbank = data & 0x03; m_bg_tilemap->mark_all_dirty(); } /* bit 2 selects which of the two bitmaps to display (for 2 players game) */ m_show_bitmap = BIT(data,2); /* bit 3 enables NMI */ m_nmi_mask = BIT(data,3); //if (!(m_nmi_mask)) m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); // test for later, could this explain the need for 4 NMIs per frame instead of one? Is the game manually retriggering NMI using the mask register, several times during the vblank period? /* bits 4-5 control ROM bank */ membank("bank1")->set_entry((data & 0x30) >> 4); } /*************************************************************************** Display refresh ***************************************************************************/ void hotsmash_state::pbillian_draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = m_spriteram; int offs; for (offs = 0; offs < m_spriteram.bytes(); offs += 4) { int attr = spriteram[offs + 3]; int code = ((spriteram[offs] & 0xfc) >> 2) + 64 * (attr & 0x0f); int color = (attr & 0xf0) >> 4; int sx = spriteram[offs + 1] + 256 * (spriteram[offs] & 0x01); int sy = spriteram[offs + 2]; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; } m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, code, color, flip_screen(), flip_screen(), sx, sy, 0); } } void superqix_state_base::superqix_draw_sprites(bitmap_ind16 &bitmap,const rectangle &cliprect) { uint8_t *spriteram = m_spriteram; int offs; for (offs = 0; offs < m_spriteram.bytes(); offs += 4) { int attr = spriteram[offs + 3]; int code = spriteram[offs] + 256 * (attr & 0x01); int color = (attr & 0xf0) >> 4; int flipx = attr & 0x04; int flipy = attr & 0x08; int sx = spriteram[offs + 1]; int sy = spriteram[offs + 2]; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(2)->transpen(bitmap,cliprect, code, color, flipx, flipy, sx, sy, 0); } } uint32_t hotsmash_state::screen_update_pbillian(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); pbillian_draw_sprites(bitmap,cliprect); return 0; } uint32_t superqix_state_base::screen_update_superqix(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER1, 0); copybitmap_trans(bitmap,*m_fg_bitmap[m_show_bitmap],flip_screen(),flip_screen(),0,0,cliprect,0); superqix_draw_sprites(bitmap,cliprect); m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_LAYER0, 0); return 0; }