// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic /*************************************************************************** Micromint SB180 ****************************************************************************/ #include "emu.h" #include "cpu/z180/z180.h" #include "imagedev/floppy.h" #include "formats/imd_dsk.h" #include "machine/upd765.h" #include "bus/rs232/rs232.h" #define FDC9266_TAG "u24" class sb180_state : public driver_device { public: sb180_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_fdc(*this, FDC9266_TAG) , m_floppy(*this, FDC9266_TAG ":%u", 0) { } void sb180(machine_config &config); private: virtual void machine_reset() override; void sb180_io(address_map &map); void sb180_mem(address_map &map); required_device m_maincpu; required_device m_fdc; required_device_array m_floppy; }; void sb180_state::sb180_mem(address_map &map) { map.unmap_value_high(); map(0x00000, 0x01fff).rom().mirror(0x3e000); map(0x40000, 0x7ffff).ram(); // 256KB RAM 8 * 41256 DRAM } void sb180_state::sb180_io(address_map &map) { map.global_mask(0xff); map.unmap_value_high(); map(0x00, 0x7f).ram(); /* Z180 internal registers */ map(0x80, 0x81).m(m_fdc, FUNC(upd765a_device::map)); map(0xa0, 0xa0).rw(m_fdc, FUNC(upd765a_device::dma_r), FUNC(upd765a_device::dma_w)); } /* Input ports */ static INPUT_PORTS_START( sb180 ) INPUT_PORTS_END void sb180_state::machine_reset() { // motor is actually connected on TXS pin of CPU for (auto &drive : m_floppy) { if (drive->get_device()) drive->get_device()->mon_w(0); } } static void sb180_floppies(device_slot_interface &device) { device.option_add("35dd", FLOPPY_35_DD); } static void sb180_floppy_formats(format_registration &fr) { fr.add_mfm_containers(); fr.add(FLOPPY_IMD_FORMAT); } static DEVICE_INPUT_DEFAULTS_START( terminal ) DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 ) DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 ) DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 ) DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE ) DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 ) DEVICE_INPUT_DEFAULTS_END void sb180_state::sb180(machine_config &config) { /* basic machine hardware */ HD64180RP(config, m_maincpu, XTAL(12'288'000)); // location U17 HD64180 m_maincpu->set_addrmap(AS_PROGRAM, &sb180_state::sb180_mem); m_maincpu->set_addrmap(AS_IO, &sb180_state::sb180_io); m_maincpu->tend1_wr_callback().set(m_fdc, FUNC(upd765a_device::tc_line_w)); m_maincpu->txa1_wr_callback().set("rs232", FUNC(rs232_port_device::write_txd)); // FDC9266 location U24 UPD765A(config, m_fdc, XTAL(8'000'000)); m_fdc->intrq_wr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ2); m_fdc->drq_wr_callback().set_inputline(m_maincpu, Z180_INPUT_LINE_DREQ1); /* floppy drives */ FLOPPY_CONNECTOR(config, m_floppy[0], sb180_floppies, "35dd", sb180_floppy_formats); FLOPPY_CONNECTOR(config, m_floppy[1], sb180_floppies, "35dd", sb180_floppy_formats); FLOPPY_CONNECTOR(config, m_floppy[2], sb180_floppies, "35dd", sb180_floppy_formats); FLOPPY_CONNECTOR(config, m_floppy[3], sb180_floppies, "35dd", sb180_floppy_formats); rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal")); rs232.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(terminal)); // must be below the DEVICE_INPUT_DEFAULTS_START block rs232.rxd_handler().set(m_maincpu, FUNC(z180_device::rxa1_w)); } /* ROM definition */ ROM_START( sb180 ) ROM_REGION( 0x10000, "maincpu", ROMREGION_ERASEFF ) ROM_LOAD( "monitor.bin", 0x0000, 0x2000, CRC(49640012) SHA1(ea571dc7476430e31b74bd1ab7a577e9013ad0bd)) ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1985, sb180, 0, 0, sb180, sb180, sb180_state, empty_init, "Micromint", "SB180", MACHINE_NO_SOUND)