// license:BSD-3-Clause // copyright-holders:Nicola Salmoria /************************************************************************* Sega KO Punch Functions to emulate the video hardware of the machine. *************************************************************************/ #include "emu.h" #include "includes/kopunch.h" PALETTE_INIT_MEMBER(kopunch_state, kopunch) { const uint8_t *color_prom = memregion("proms")->base(); color_prom += 24; // first 24 colors are black for (int i = 0; i < palette.entries(); i++) { int bit0, bit1, bit2, r, g, b; /* red component */ bit0 = (*color_prom >> 0) & 0x01; bit1 = (*color_prom >> 1) & 0x01; bit2 = (*color_prom >> 2) & 0x01; r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* green component */ bit0 = (*color_prom >> 3) & 0x01; bit1 = (*color_prom >> 4) & 0x01; bit2 = (*color_prom >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* blue component */ bit0 = 0; bit1 = (*color_prom >> 6) & 0x01; bit2 = (*color_prom >> 7) & 0x01; b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette.set_pen_color(i, rgb_t(r, g, b)); color_prom++; } } WRITE8_MEMBER(kopunch_state::vram_fg_w) { m_vram_fg[offset] = data; m_fg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(kopunch_state::vram_bg_w) { m_vram_bg[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(kopunch_state::scroll_x_w) { m_scrollx = data; m_bg_tilemap->set_scrollx(0, data); } WRITE8_MEMBER(kopunch_state::scroll_y_w) { m_bg_tilemap->set_scrolly(0, data); } WRITE8_MEMBER(kopunch_state::gfxbank_w) { // d0-d2: bg gfx bank if (m_gfxbank != (data & 0x07)) { m_gfxbank = data & 0x07; m_bg_tilemap->mark_all_dirty(); } // d3: flip y, other bits: N/C m_bg_tilemap->set_flip((data & 0x08) ? TILEMAP_FLIPY : 0); } TILE_GET_INFO_MEMBER(kopunch_state::get_fg_tile_info) { int code = m_vram_fg[tile_index]; SET_TILE_INFO_MEMBER(0, code, 0, 0); } TILE_GET_INFO_MEMBER(kopunch_state::get_bg_tile_info) { // note: highest bit is unused int code = (m_vram_bg[tile_index] & 0x7f) | m_gfxbank << 7; SET_TILE_INFO_MEMBER(1, code, 0, 0); } void kopunch_state::video_start() { m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(kopunch_state::get_fg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(kopunch_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 16, 16, 16, 16); m_fg_tilemap->set_transparent_pen(0); } uint32_t kopunch_state::screen_update_kopunch(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { bitmap.fill(0, cliprect); // background does not wrap around horizontally rectangle bg_clip = cliprect; bg_clip.max_x = m_scrollx ^ 0xff; m_bg_tilemap->draw(screen, bitmap, bg_clip, 0, 0); m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; }