// license:BSD-3-Clause // copyright-holders:Stefan Jokisch /*************************************************************************** Atari Sprint 4 video emulation ***************************************************************************/ #include "emu.h" #include "includes/sprint4.h" #include "audio/sprint4.h" #include "screen.h" PALETTE_INIT_MEMBER(sprint4_state, sprint4) { palette.set_indirect_color(0, rgb_t(0x00, 0x00, 0x00)); /* black */ palette.set_indirect_color(1, rgb_t(0xfc, 0xdf, 0x80)); /* peach */ palette.set_indirect_color(2, rgb_t(0xf0, 0x00, 0xf0)); /* violet */ palette.set_indirect_color(3, rgb_t(0x00, 0xf0, 0x0f)); /* green */ palette.set_indirect_color(4, rgb_t(0x30, 0x4f, 0xff)); /* blue */ palette.set_indirect_color(5, rgb_t(0xff, 0xff, 0xff)); /* white */ palette.set_pen_indirect(0, 0); palette.set_pen_indirect(2, 0); palette.set_pen_indirect(4, 0); palette.set_pen_indirect(6, 0); palette.set_pen_indirect(8, 0); palette.set_pen_indirect(1, 1); palette.set_pen_indirect(3, 2); palette.set_pen_indirect(5, 3); palette.set_pen_indirect(7, 4); palette.set_pen_indirect(9, 5); } TILE_GET_INFO_MEMBER(sprint4_state::tile_info) { uint8_t code = m_videoram[tile_index]; if ((code & 0x30) == 0x30) SET_TILE_INFO_MEMBER(0, code & ~0x40, (code >> 6) ^ 3, 0); else SET_TILE_INFO_MEMBER(0, code, 4, 0); } void sprint4_state::video_start() { m_screen->register_screen_bitmap(m_helper); m_playfield = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(sprint4_state::tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32); } uint32_t sprint4_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_playfield->draw(screen, bitmap, cliprect, 0, 0); for (int i = 0; i < 4; i++) { int bank = 0; uint8_t horz = m_videoram[0x390 + 2 * i + 0]; uint8_t attr = m_videoram[0x390 + 2 * i + 1]; uint8_t vert = m_videoram[0x398 + 2 * i + 0]; uint8_t code = m_videoram[0x398 + 2 * i + 1]; if (i & 1) bank = 32; m_gfxdecode->gfx(1)->transpen(bitmap,cliprect, (code >> 3) | bank, (attr & 0x80) ? 4 : i, 0, 0, horz - 15, vert - 15, 0); } return 0; } WRITE_LINE_MEMBER(sprint4_state::screen_vblank) { // rising edge if (state) { /* check for sprite-playfield collisions */ for (int i = 0; i < 4; i++) { rectangle rect; int bank = 0; uint8_t horz = m_videoram[0x390 + 2 * i + 0]; uint8_t vert = m_videoram[0x398 + 2 * i + 0]; uint8_t code = m_videoram[0x398 + 2 * i + 1]; rect.min_x = horz - 15; rect.min_y = vert - 15; rect.max_x = horz - 15 + m_gfxdecode->gfx(1)->width() - 1; rect.max_y = vert - 15 + m_gfxdecode->gfx(1)->height() - 1; rect &= m_screen->visible_area(); m_playfield->draw(*m_screen, m_helper, rect, 0, 0); if (i & 1) bank = 32; m_gfxdecode->gfx(1)->transpen(m_helper,rect, (code >> 3) | bank, 4, 0, 0, horz - 15, vert - 15, 1); for (int y = rect.min_y; y <= rect.max_y; y++) for (int x = rect.min_x; x <= rect.max_x; x++) if (m_palette->pen_indirect(m_helper.pix16(y, x)) != 0) m_collision[i] = 1; } /* update sound status */ address_space &space = machine().dummy_space(); m_discrete->write(space, SPRINT4_MOTOR_DATA_1, m_videoram[0x391] & 15); m_discrete->write(space, SPRINT4_MOTOR_DATA_2, m_videoram[0x393] & 15); m_discrete->write(space, SPRINT4_MOTOR_DATA_3, m_videoram[0x395] & 15); m_discrete->write(space, SPRINT4_MOTOR_DATA_4, m_videoram[0x397] & 15); } } WRITE8_MEMBER(sprint4_state::video_ram_w) { m_videoram[offset] = data; m_playfield->mark_tile_dirty(offset); }