// license:BSD-3-Clause // copyright-holders:Curt Coder, Robbbert /******************************************************************************************************************** 2013-07-31 Skeleton Driver [Curt Coder] 2013-07-31 Connected to terminal [Robbbert] 2016-07-11 After 10 seconds the monitor program will start [Robbbert] Commands: (no spaces allowed) B - Boot the disk D - Dump memory to screen F - Fill Memory G - Go To H - Help P - Alter port values S - Alter memory The photos show 3 boards: - A "SASI Interface" board (all 74-series TTL) - CPU board (64k dynamic RAM, Z80A CPU, 2x Z80CTC, 2x Z80SIO/0, MB8877A, Z80DMA, 4x MC1488, 4x MC1489, XTALS 1.8432MHz and 24MHz) - ADES board (Adaptec Inc AIC-100, AIC-250, AIC-300, Intel D8085AH, unknown crystal) ********************************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "machine/z80daisy.h" #include "machine/z80ctc.h" #include "machine/z80sio.h" #include "bus/rs232/rs232.h" class dsb46_state : public driver_device { public: dsb46_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") { } void dsb46(machine_config &config); void init_dsb46(); protected: virtual void machine_reset() override; private: DECLARE_WRITE8_MEMBER(port1a_w); void dsb46_io(address_map &map); void dsb46_mem(address_map &map); required_device m_maincpu; }; void dsb46_state::dsb46_mem(address_map &map) { map(0x0000, 0x07ff).bankr("read").bankw("write"); map(0x0800, 0xffff).ram(); } void dsb46_state::dsb46_io(address_map &map) { map.global_mask(0xff); map.unmap_value_high(); map(0x00, 0x03).rw("sio", FUNC(z80sio_device::ba_cd_r), FUNC(z80sio_device::ba_cd_w)); map(0x08, 0x0b).rw("ctc1", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); map(0x1a, 0x1a).w(FUNC(dsb46_state::port1a_w)); //map(0x10, 0x10) disk related //map(0x14, 0x14) ?? (read after CTC1 TRG3) //map(0x18, 0x18) ?? //map(0x1c, 0x1c) disk data //map(0x1d, 0x1d) disk status (FF = no fdc) } static INPUT_PORTS_START( dsb46 ) INPUT_PORTS_END void dsb46_state::init_dsb46() { uint8_t *RAM = memregion("maincpu")->base(); membank("read")->configure_entry(0, &RAM[0x10000]); membank("read")->configure_entry(1, &RAM[0x00000]); membank("write")->configure_entry(0, &RAM[0x00000]); } void dsb46_state::machine_reset() { membank("read")->set_entry(0); membank("write")->set_entry(0); m_maincpu->reset(); } WRITE8_MEMBER( dsb46_state::port1a_w ) { membank("read")->set_entry(data & 1); } static const z80_daisy_config daisy_chain[] = { { "ctc1" }, { "sio" }, { nullptr } }; void dsb46_state::dsb46(machine_config &config) { // basic machine hardware Z80(config, m_maincpu, 24_MHz_XTAL / 6); m_maincpu->set_addrmap(AS_PROGRAM, &dsb46_state::dsb46_mem); m_maincpu->set_addrmap(AS_IO, &dsb46_state::dsb46_io); m_maincpu->set_daisy_config(daisy_chain); /* Devices */ z80sio_device& sio(Z80SIO(config, "sio", 24_MHz_XTAL / 6)); sio.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); sio.out_txda_callback().set("rs232", FUNC(rs232_port_device::write_txd)); sio.out_dtra_callback().set("rs232", FUNC(rs232_port_device::write_dtr)); sio.out_rtsa_callback().set("rs232", FUNC(rs232_port_device::write_rts)); rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal")); rs232.rxd_handler().set("sio", FUNC(z80sio_device::rxa_w)); rs232.cts_handler().set("sio", FUNC(z80sio_device::ctsa_w)); z80ctc_device &ctc1(Z80CTC(config, "ctc1", 24_MHz_XTAL / 6)); ctc1.intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); ctc1.set_clk<0>(1.8432_MHz_XTAL); ctc1.zc_callback<0>().set("sio", FUNC(z80sio_device::rxca_w)); ctc1.zc_callback<0>().append("sio", FUNC(z80sio_device::txca_w)); ctc1.set_clk<2>(1.8432_MHz_XTAL); ctc1.zc_callback<2>().set("sio", FUNC(z80sio_device::rxcb_w)); ctc1.zc_callback<2>().append("sio", FUNC(z80sio_device::txcb_w)); } ROM_START( dsb46 ) ROM_REGION( 0x10800, "maincpu", 0 ) ROM_LOAD( "1538a.bin", 0x10000, 0x800, CRC(65b3e26e) SHA1(afe1f03f266b7d13fdb1f1bc6762df5e0aa5c764) ) ROM_REGION( 0x4000, "ades", 0 ) ROM_LOAD( "ades.bin", 0x0000, 0x4000, CRC(d374abf0) SHA1(331f51a2bb81375aeffbe63c1ebc1d7cd779b9c3) ) ROM_END COMP( 198?, dsb46, 0, 0, dsb46, dsb46, dsb46_state, init_dsb46, "Davidge", "DSB-4/6", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )