// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Dual Systems 68000 09/12/2009 Skeleton driver. ****************************************************************************/ #include "emu.h" #include "cpu/m68000/m68000.h" #include "cpu/i8085/i8085.h" #include "bus/rs232/rs232.h" //#include "bus/s100/s100.h" #include "machine/input_merger.h" #include "machine/scn_pci.h" class dual68_state : public driver_device { public: dual68_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_usart(*this, "usart%u", 1U) , m_p_ram(*this, "ram") { } void dual68(machine_config &config); private: uint8_t sio_direct_r(offs_t offset); void sio_direct_w(offs_t offset, uint8_t data); uint8_t sio_status_r(); uint8_t fdc_status_r(); void dual68_mem(address_map &map); void sio4_io(address_map &map); void sio4_mem(address_map &map); virtual void machine_reset() override; required_device m_maincpu; required_device_array m_usart; required_shared_ptr m_p_ram; }; uint8_t dual68_state::sio_direct_r(offs_t offset) { return m_usart[0]->read(offset); } void dual68_state::sio_direct_w(offs_t offset, uint8_t data) { m_usart[0]->write(offset, data); } uint8_t dual68_state::sio_status_r() { return 0x00; } uint8_t dual68_state::fdc_status_r() { return 0x40; } void dual68_state::dual68_mem(address_map &map) { map.unmap_value_high(); map(0x000000, 0x00ffff).ram().share("ram"); map(0x080000, 0x081fff).rom().region("mainbios", 0); map(0x7f0000, 0x7f0001).rw(FUNC(dual68_state::sio_direct_r), FUNC(dual68_state::sio_direct_w)); map(0x7f00c0, 0x7f00c0).r(FUNC(dual68_state::fdc_status_r)); map(0x800000, 0x801fff).rom().region("mainbios", 0); } void dual68_state::sio4_mem(address_map &map) { map.unmap_value_high(); map(0x0000, 0x07ff).rom().region("siocpu", 0); map(0x8000, 0x87ff).mirror(0x7800).ram(); //map(0xffe3, 0xffe3).lr8("usart0_rx_hack", []() { return 0x02; }); } void dual68_state::sio4_io(address_map &map) { map.unmap_value_high(); map(0x06, 0x06).r(FUNC(dual68_state::sio_status_r)); map(0x18, 0x18).nopw(); map(0x20, 0x23).rw("usart1", FUNC(scn_pci_device::read), FUNC(scn_pci_device::write)); map(0x28, 0x2b).rw("usart2", FUNC(scn_pci_device::read), FUNC(scn_pci_device::write)); map(0x30, 0x33).rw("usart3", FUNC(scn_pci_device::read), FUNC(scn_pci_device::write)); map(0x38, 0x3b).rw("usart4", FUNC(scn_pci_device::read), FUNC(scn_pci_device::write)); } /* Input ports */ static INPUT_PORTS_START( dual68 ) INPUT_PORTS_END void dual68_state::machine_reset() { uint8_t *mainbios = memregion("mainbios")->base(); memcpy((uint8_t*)m_p_ram.target(),mainbios,0x2000); } void dual68_state::dual68(machine_config &config) { /* basic machine hardware */ M68000(config, m_maincpu, 16_MHz_XTAL / 2); // MC68000L8 m_maincpu->set_addrmap(AS_PROGRAM, &dual68_state::dual68_mem); i8085a_cpu_device &siocpu(I8085A(config, "siocpu", 9.8304_MHz_XTAL)); // NEC D8085AC-2 siocpu.set_addrmap(AS_PROGRAM, &dual68_state::sio4_mem); siocpu.set_addrmap(AS_IO, &dual68_state::sio4_io); for (auto &usart : m_usart) SCN2661B(config, usart, 9.8304_MHz_XTAL / 2); m_usart[0]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<0>)); m_usart[1]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<1>)); m_usart[2]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<2>)); m_usart[3]->rxrdy_handler().set("usartint", FUNC(input_merger_device::in_w<3>)); m_usart[0]->txd_handler().set("rs232", FUNC(rs232_port_device::write_txd)); m_usart[0]->rts_handler().set("rs232", FUNC(rs232_port_device::write_rts)); m_usart[0]->dtr_handler().set("rs232", FUNC(rs232_port_device::write_dtr)); INPUT_MERGER_ANY_HIGH(config, "usartint").output_handler().set_inputline("siocpu", I8085_RST65_LINE); rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal")); rs232.rxd_handler().set(m_usart[0], FUNC(scn_pci_device::rxd_w)); rs232.dsr_handler().set(m_usart[0], FUNC(scn_pci_device::dsr_w)); rs232.dcd_handler().set(m_usart[0], FUNC(scn_pci_device::dcd_w)); rs232.cts_handler().set(m_usart[0], FUNC(scn_pci_device::cts_w)); } /* ROM definition */ ROM_START( dual68 ) ROM_REGION16_BE( 0x2000, "mainbios", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS( 0, "v1", "2 * 4KB" ) ROMX_LOAD("dual_cpu68000_1.bin", 0x0000, 0x1000, CRC(d1785c08) SHA1(73c1f68875f1d8eb5e92f4347f509c61103da90f),ROM_SKIP(1) | ROM_BIOS(0)) ROMX_LOAD("dual_cpu68000_2.bin", 0x0001, 0x1000, CRC(b9f1ba3c) SHA1(8fd02936ad06d5a22d435d96f06e2442fc7d00ec),ROM_SKIP(1) | ROM_BIOS(0)) ROM_SYSTEM_BIOS( 1, "v2", "2 * 2KB" ) ROMX_LOAD("dual.u2.bin", 0x0000, 0x0800, CRC(e9c44fcd) SHA1(d5cc609d6f5e6745d5f0af1aa6dc66012333ed60),ROM_SKIP(1) | ROM_BIOS(1)) ROMX_LOAD("dual.u3.bin", 0x0001, 0x0800, CRC(827b049f) SHA1(8209f8ab3d1068e5bab51e7eb12be46d4ea28354),ROM_SKIP(1) | ROM_BIOS(1)) ROM_REGION( 0x10000, "siocpu", ROMREGION_ERASEFF ) ROM_LOAD("dual_sio4.bin", 0x0000, 0x0800, CRC(6b0a1965) SHA1(5d2dc6c6a315293ded4b9fc95c8ac1599bf31dd3)) ROM_END /* Driver */ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1981, dual68, 0, 0, dual68, dual68, dual68_state, empty_init, "Dual Systems Corporation", "Dual Systems 68000", MACHINE_NOT_WORKING | MACHINE_NO_SOUND | MACHINE_SUPPORTS_SAVE )