// license:BSD-3-Clause // copyright-holders:Carlos A. Lozano, Phil Stroffolino /*************************************************************************** video/contra.c ***************************************************************************/ #include "emu.h" #include "includes/contra.h" /*************************************************************************** ** ** Contra has palette RAM, but it also has four lookup table PROMs ** ** 0 sprites #0 ** 1 tiles #0 ** 2 sprites #1 ** 3 tiles #1 ** ***************************************************************************/ void contra_state::contra_palette(palette_device &palette) const { uint8_t const *const color_prom = memregion("proms")->base(); for (int chip = 0; chip < 2; chip++) { for (int pal = 0; pal < 8; pal++) { int const clut = (chip << 1) | (pal & 1); for (int i = 0; i < 0x100; i++) { uint8_t ctabentry; if (((pal & 0x01) == 0) && (color_prom[(clut << 8) | i] == 0)) ctabentry = 0; else ctabentry = (pal << 4) | (color_prom[(clut << 8) | i] & 0x0f); palette.set_pen_indirect((chip << 11) | (pal << 8) | i, ctabentry); } } } } /*************************************************************************** Callbacks for the TileMap code ***************************************************************************/ TILE_GET_INFO_MEMBER(contra_state::get_fg_tile_info) { uint8_t ctrl_3 = m_k007121_1->ctrlram_r(3); uint8_t ctrl_4 = m_k007121_1->ctrlram_r(4); uint8_t ctrl_5 = m_k007121_1->ctrlram_r(5); uint8_t ctrl_6 = m_k007121_1->ctrlram_r(6); int attr = m_fg_cram[tile_index]; int bit0 = (ctrl_5 >> 0) & 0x03; int bit1 = (ctrl_5 >> 2) & 0x03; int bit2 = (ctrl_5 >> 4) & 0x03; int bit3 = (ctrl_5 >> 6) & 0x03; int bank = ((attr & 0x80) >> 7) | ((attr >> (bit0 + 2)) & 0x02) | ((attr >> (bit1 + 1)) & 0x04) | ((attr >> (bit2 )) & 0x08) | ((attr >> (bit3 - 1)) & 0x10) | ((ctrl_3 & 0x01) << 5); int mask = (ctrl_4 & 0xf0) >> 4; bank = (bank & ~(mask << 1)) | ((ctrl_4 & mask) << 1); SET_TILE_INFO_MEMBER(0, m_fg_vram[tile_index] + bank * 256, ((ctrl_6 & 0x30) * 2 + 16) + (attr & 7), 0); } TILE_GET_INFO_MEMBER(contra_state::get_bg_tile_info) { uint8_t ctrl_3 = m_k007121_2->ctrlram_r(3); uint8_t ctrl_4 = m_k007121_2->ctrlram_r(4); uint8_t ctrl_5 = m_k007121_2->ctrlram_r(5); uint8_t ctrl_6 = m_k007121_2->ctrlram_r(6); int attr = m_bg_cram[tile_index]; int bit0 = (ctrl_5 >> 0) & 0x03; int bit1 = (ctrl_5 >> 2) & 0x03; int bit2 = (ctrl_5 >> 4) & 0x03; int bit3 = (ctrl_5 >> 6) & 0x03; int bank = ((attr & 0x80) >> 7) | ((attr >> (bit0 + 2)) & 0x02) | ((attr >> (bit1 + 1)) & 0x04) | ((attr >> (bit2 )) & 0x08) | ((attr >> (bit3 - 1)) & 0x10) | ((ctrl_3 & 0x01) << 5); int mask = (ctrl_4 & 0xf0) >> 4; // 2009-12 FP: TO BE VERIFIED - old code used ctrl4 from chip 0?!? bank = (bank & ~(mask << 1)) | ((ctrl_4 & mask) << 1); SET_TILE_INFO_MEMBER(1, m_bg_vram[tile_index] + bank * 256, ((ctrl_6 & 0x30) * 2 + 16) + (attr & 7), 0); } TILE_GET_INFO_MEMBER(contra_state::get_tx_tile_info) { uint8_t ctrl_5 = m_k007121_1->ctrlram_r(5); uint8_t ctrl_6 = m_k007121_1->ctrlram_r(6); int attr = m_tx_cram[tile_index]; int bit0 = (ctrl_5 >> 0) & 0x03; int bit1 = (ctrl_5 >> 2) & 0x03; int bit2 = (ctrl_5 >> 4) & 0x03; int bit3 = (ctrl_5 >> 6) & 0x03; int bank = ((attr & 0x80) >> 7) | ((attr >> (bit0 + 2)) & 0x02) | ((attr >> (bit1 + 1)) & 0x04) | ((attr >> (bit2 )) & 0x08) | ((attr >> (bit3 - 1)) & 0x10); SET_TILE_INFO_MEMBER(0, m_tx_vram[tile_index] + bank * 256, ((ctrl_6 & 0x30) * 2 + 16) + (attr & 7), 0); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ void contra_state::video_start() { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(contra_state::get_bg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(contra_state::get_fg_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(contra_state::get_tx_tile_info)), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_buffered_spriteram = std::make_unique(0x800); m_buffered_spriteram_2 = std::make_unique(0x800); m_bg_clip = m_screen->visible_area(); m_bg_clip.min_x += 40; m_fg_clip = m_bg_clip; m_tx_clip = m_screen->visible_area(); m_tx_clip.max_x = 39; m_tx_clip.min_x = 0; m_fg_tilemap->set_transparent_pen(0); save_pointer(NAME(m_buffered_spriteram), 0x800); save_pointer(NAME(m_buffered_spriteram_2), 0x800); } /*************************************************************************** Memory handlers ***************************************************************************/ WRITE8_MEMBER(contra_state::contra_fg_vram_w) { m_fg_vram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(contra_state::contra_fg_cram_w) { m_fg_cram[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(contra_state::contra_bg_vram_w) { m_bg_vram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(contra_state::contra_bg_cram_w) { m_bg_cram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(contra_state::contra_text_vram_w) { m_tx_vram[offset] = data; m_tx_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(contra_state::contra_text_cram_w) { m_tx_cram[offset] = data; m_tx_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(contra_state::contra_K007121_ctrl_0_w) { uint8_t ctrl_6 = m_k007121_1->ctrlram_r(6); if (offset == 3) { if ((data & 0x8) == 0) memcpy(m_buffered_spriteram.get(), m_spriteram + 0x800, 0x800); else memcpy(m_buffered_spriteram.get(), m_spriteram, 0x800); } if (offset == 6) { if (ctrl_6 != data) m_fg_tilemap->mark_all_dirty(); } if (offset == 7) m_fg_tilemap->set_flip((data & 0x08) ? (TILEMAP_FLIPY | TILEMAP_FLIPX) : 0); m_k007121_1->ctrl_w(space, offset, data); } WRITE8_MEMBER(contra_state::contra_K007121_ctrl_1_w) { uint8_t ctrl_6 = m_k007121_2->ctrlram_r(6); if (offset == 3) { if ((data & 0x8) == 0) memcpy(m_buffered_spriteram_2.get(), m_spriteram_2 + 0x800, 0x800); else memcpy(m_buffered_spriteram_2.get(), m_spriteram_2 + 0x000, 0x800); } if (offset == 6) { if (ctrl_6 != data ) m_bg_tilemap->mark_all_dirty(); } if (offset == 7) m_bg_tilemap->set_flip((data & 0x08) ? (TILEMAP_FLIPY | TILEMAP_FLIPX) : 0); m_k007121_2->ctrl_w(space, offset, data); } /*************************************************************************** Display Refresh ***************************************************************************/ void contra_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect, bitmap_ind8 &priority_bitmap, int bank ) { k007121_device *k007121 = bank ? m_k007121_2 : m_k007121_1; int base_color = (k007121->ctrlram_r(6) & 0x30) * 2; const uint8_t *source; if (bank == 0) source = m_buffered_spriteram.get(); else source = m_buffered_spriteram_2.get(); k007121->sprites_draw(bitmap, cliprect, m_gfxdecode->gfx(bank), *m_palette, source, base_color, 40, 0, priority_bitmap, (uint32_t)-1); } uint32_t contra_state::screen_update_contra(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { uint8_t ctrl_1_0 = m_k007121_1->ctrlram_r(0); uint8_t ctrl_1_2 = m_k007121_1->ctrlram_r(2); uint8_t ctrl_2_0 = m_k007121_2->ctrlram_r(0); uint8_t ctrl_2_2 = m_k007121_2->ctrlram_r(2); rectangle bg_finalclip = m_bg_clip; rectangle fg_finalclip = m_fg_clip; rectangle tx_finalclip = m_tx_clip; bg_finalclip &= cliprect; fg_finalclip &= cliprect; tx_finalclip &= cliprect; m_fg_tilemap->set_scrollx(0, ctrl_1_0 - 40); m_fg_tilemap->set_scrolly(0, ctrl_1_2); m_bg_tilemap->set_scrollx(0, ctrl_2_0 - 40); m_bg_tilemap->set_scrolly(0, ctrl_2_2); m_bg_tilemap->draw(screen, bitmap, bg_finalclip, 0 ,0); m_fg_tilemap->draw(screen, bitmap, fg_finalclip, 0 ,0); draw_sprites(bitmap,cliprect, screen.priority(), 0); draw_sprites(bitmap,cliprect, screen.priority(), 1); m_tx_tilemap->draw(screen, bitmap, tx_finalclip, 0 ,0); return 0; }