// license:BSD-3-Clause // copyright-holders:David Haywood /* todo: sometimes sprites get left onscreen (xain) */ #include "emu.h" #include "cedar_magnet_sprite.h" DEFINE_DEVICE_TYPE(CEDAR_MAGNET_SPRITE, cedar_magnet_sprite_device, "cedmag_sprite", "Cedar Sprite") cedar_magnet_sprite_device::cedar_magnet_sprite_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, CEDAR_MAGNET_SPRITE, tag, owner, clock) , cedar_magnet_board_interface(mconfig, *this, "spritecpu", "ram") , m_sprite_ram_bankdev(*this, "sp_sub_ram") , m_pio(*this, "z80pio%u", 0U) { } void cedar_magnet_sprite_device::cedar_magnet_sprite_sub_ram_map(address_map &map) { // these are 8x SIEMENS HYB 41256-15 AA - 262,144 bit DRAM (32kbytes) // these are on the sprite board memory sub-board map(0x00000, 0x3ffff).ram().share("ram"); } u8 cedar_magnet_sprite_device::exzisus_hack_r(offs_t offset) { //printf("exzisus_hack_r\n"); int pc = m_cpu->pc(); // exzisus has startup code outside of the first 0x400 bytes // but the main cpu only transfers 0x400 bytes of the code to the other banks?! if ((pc >= 0x3e0) && (pc <= 0x800)) { return m_ram[0x400 + offset]; } else { return m_ram[0x400 + offset + (m_pio2_pb_data & 0x3) * 0x10000]; } } void cedar_magnet_sprite_device::cedar_magnet_sprite_map(address_map &map) { map(0x00000, 0x0ffff).m("sp_sub_ram", FUNC(address_map_bank_device::amap8)); map(0x00400, 0x007ff).r(FUNC(cedar_magnet_sprite_device::exzisus_hack_r)); } void cedar_magnet_sprite_device::cedar_magnet_sprite_io(address_map &map) { map.global_mask(0xff); map(0xc0, 0xc3).rw("z80pio0", FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); map(0xc4, 0xc7).rw("z80pio1", FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); map(0xc8, 0xcb).rw("z80pio2", FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); map(0x80, 0x80).w(FUNC(cedar_magnet_sprite_device::sprite_port80_w)); map(0x84, 0x84).w(FUNC(cedar_magnet_sprite_device::sprite_port84_w)); map(0x88, 0x88).w(FUNC(cedar_magnet_sprite_device::sprite_port88_w)); // increasing values // upper address? map(0x8c, 0x8c).w(FUNC(cedar_magnet_sprite_device::sprite_port8c_w)); // written after 88 (possible data upload?) map(0x9c, 0x9c).w(FUNC(cedar_magnet_sprite_device::sprite_port9c_w)); // ? } void cedar_magnet_sprite_device::do_blit() { // printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"); // printf("~~~~~~~~~~~~~~~~~ drawing sprite with x:%02x y:%02x code:%04x size:%02x unk:%02x\n", m_loweraddr, m_upperaddr, (m_spritecodehigh << 8) | m_spritecodelow, m_spritesize, m_pio0_pb_data); // printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n"); int ysize = 0; int xsize = 0; int erase = 0; // bit 0x80 is always set if ((m_spritesize & 0x7f) == 0x00) ysize = xsize = 8; if ((m_spritesize & 0x7f) == 0x01) ysize = xsize = 16; if ((m_spritesize & 0x7f) == 0x02) ysize = xsize = 32; if ((m_spritesize & 0x7f) == 0x03) ysize = xsize = 64; // m_spritesize // m_pio0_pb_data int source = (m_spritecodehigh << 8) | m_spritecodelow; if (source == 0) erase = 1; source &= ~0x3f; for (int y = 0; y < ysize; y++) { for (int x = 0; x < xsize; x++) { int xpos = (m_loweraddr + x); int ypos = (m_upperaddr + y); u8 data = m_ram[source + ((m_uppersprite & 0x3) * 0x10000)]; if (!(m_pio0_pb_data & 0x02)) data = machine().rand(); source++; xpos &= 0xff; // without this some sprites incorrectly wraparound on the volcano table. if (!erase) { if (!(m_pio0_pb_data & 0x40)) { if (xpos >= 0xff-64) continue; } else { if (xpos < 64) continue; } } //if ((ypos >= 0) && (ypos < 0x100)) ypos &= 0xff; { int offset = (ypos * 256) + xpos; if (erase == 1) { m_framebuffer[offset] = 0; } else { if (data) m_framebuffer[offset] = data; } } } } } void cedar_magnet_sprite_device::sprite_port80_w(u8 data) { m_spritecodelow = data; // printf("%s:sprite numlow / trigger %02x\n", machine().describe_context().c_str(), data); do_blit(); } void cedar_magnet_sprite_device::sprite_port84_w(u8 data) { m_spritecodehigh = data; m_high_write = 1; // printf("%s:sprite numhigh %02x\n", machine().describe_context().c_str(), data); } void cedar_magnet_sprite_device::sprite_port88_w(u8 data) { // frequent // printf("%s:sprite_y_coordinate %02x\n", machine().describe_context().c_str(), data); m_upperaddr = data; } void cedar_magnet_sprite_device::pio2_pa_w(u8 data) { // frequent // printf("%s:sprite_x_coordinate %02x\n", machine().describe_context().c_str(), data); m_loweraddr = data; } void cedar_magnet_sprite_device::sprite_port8c_w(u8 data) { int address = (m_upperaddr << 8) | m_loweraddr; m_framebuffer[address] = data; if (data!=0x00) printf("sprite_port8c_w write %04x %02x\n", address, data); } // possible watchdog? void cedar_magnet_sprite_device::sprite_port9c_w(u8 data) { // printf("%s:sprite_port9c_w %02x\n", machine().describe_context().c_str(), data); } void cedar_magnet_sprite_device::device_add_mconfig(machine_config &config) { z80_device &spritecpu(Z80(config, "spritecpu", 4000000)); spritecpu.set_addrmap(AS_PROGRAM, &cedar_magnet_sprite_device::cedar_magnet_sprite_map); spritecpu.set_addrmap(AS_IO, &cedar_magnet_sprite_device::cedar_magnet_sprite_io); Z80PIO(config, m_pio[0], 4000000/2); // m_pio[0]->out_int_callback().set_inputline("maincpu", INPUT_LINE_IRQ0); m_pio[0]->in_pa_callback().set(FUNC(cedar_magnet_sprite_device::pio0_pa_r)); m_pio[0]->out_pa_callback().set(FUNC(cedar_magnet_sprite_device::pio0_pa_w)); // m_pio[0]->in_pb_callback().set(FUNC(cedar_magnet_sprite_device::pio0_pb_r)); m_pio[0]->out_pb_callback().set(FUNC(cedar_magnet_sprite_device::pio0_pb_w)); Z80PIO(config, m_pio[1], 4000000/2); // m_pio[1]->out_int_callback().set_inputline("maincpu", INPUT_LINE_IRQ0); // m_pio[1]->in_pa_callback().set(FUNC(cedar_magnet_sprite_device::pio1_pa_r)); m_pio[1]->out_pa_callback().set(FUNC(cedar_magnet_sprite_device::pio1_pa_w)); // m_pio[1]->in_pb_callback().set(FUNC(cedar_magnet_sprite_device::pio1_pb_r)); m_pio[1]->out_pb_callback().set(FUNC(cedar_magnet_sprite_device::pio1_pb_w)); Z80PIO(config, m_pio[2], 4000000/2); // m_pio[2]->out_int_callback().set_inputline("maincpu", INPUT_LINE_IRQ0); // m_pio[2]->in_pa_callback().set(FUNC(cedar_magnet_sprite_device::pio2_pa_r)); m_pio[2]->out_pa_callback().set(FUNC(cedar_magnet_sprite_device::pio2_pa_w)); // m_pio[2]->in_pb_callback().set(FUNC(cedar_magnet_sprite_device::pio2_pb_r)); m_pio[2]->out_pb_callback().set(FUNC(cedar_magnet_sprite_device::pio2_pb_w)); ADDRESS_MAP_BANK(config, m_sprite_ram_bankdev).set_map(&cedar_magnet_sprite_device::cedar_magnet_sprite_sub_ram_map).set_options(ENDIANNESS_LITTLE, 8, 18, 0x10000); } u8 cedar_magnet_sprite_device::pio0_pa_r() { // actually read // printf("%s: pio0_pa_r\n", machine().describe_context().c_str()); return 0x00; } void cedar_magnet_sprite_device::pio0_pa_w(u8 data) { m_spritesize = data; } void cedar_magnet_sprite_device::pio0_pb_w(u8 data) { m_pio0_pb_data = data; //printf("%s: pio0_pb_w %02x\n", machine().describe_context().c_str(), data); } void cedar_magnet_sprite_device::pio1_pa_w(u8 data) { //printf("%s: pio1_pa_w %02x\n", machine().describe_context().c_str(), data); } void cedar_magnet_sprite_device::pio1_pb_w(u8 data) { //printf("%s: pio1_pb_w %02x\n", machine().describe_context().c_str(), data); } void cedar_magnet_sprite_device::pio2_pb_w(u8 data) { // this feels like a hack // the game writes here when creating the sprite list so that it can access the correct gfd data // however the actual LIST data is always in bank 0 (it can't be in any other bank, those areas are occupied by actual gfx) if (m_high_write) { m_uppersprite = data & 0x03; m_high_write = 0; return; } m_pio2_pb_data = data; //printf("%s: ******************************************* BANK? **** pio2_pb_w %02x\n", machine().describe_context().c_str(), data); // yes, it ends up banking the ram right out from under itself during startup execution... // during this time the main cpu is waiting in a loop, after which it copies the startup code again, and reboots it. m_sprite_ram_bankdev->set_bank(data & 0x03); } void cedar_magnet_sprite_device::device_start() { m_framebuffer = make_unique_clear(0x10000); save_pointer(NAME(m_framebuffer), 0x10000); } void cedar_magnet_sprite_device::device_reset() { halt_assert(); m_sprite_ram_bankdev->set_bank(0); m_pio2_pb_data = 0x00; m_spritesize = 0xff; } u32 cedar_magnet_sprite_device::draw(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect, int palbase) { // printf("-----------------------------------------------------------------------------------------------------------\n"); // printf("--------------------------------------------- FRAME -------------------------------------------------------\n"); // printf("-----------------------------------------------------------------------------------------------------------\n"); int count = 0; // if (!(m_m_spritesize & 0x40)) // return 0; for (int y = 0; y < 256; y++) { uint16_t *dst = &bitmap.pix16((y) & 0xff); for (int x = 0; x < 256; x++) { u8 pix = m_framebuffer[count]; count++; if (pix) dst[(x) & 0xff] = pix + palbase * 0x100; } } return 0; }