// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** Ampro Little Z80 Board 2013-09-02 Skeleton driver. Chips: Z80A @4MHz, Z80CTC, Z80DART, WD1770/2, NCR5380. Crystal: 16 MHz This is a complete CP/M single-board computer that could be mounted on top of a standard 13cm floppy drive. You needed to supply your own power supply and serial terminal. The later versions included a SCSI chip (NCR5380) enabling the use of a hard drive of up to 88MB. ToDo: - (maybe) add scsi interface - Add printer ****************************************************************************/ #include "emu.h" #include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" #include "imagedev/floppy.h" #include "machine/z80daisy.h" #include "machine/z80ctc.h" #include "machine/z80dart.h" #include "machine/wd_fdc.h" #include "machine/timer.h" #include "softlist.h" class ampro_state : public driver_device { public: ampro_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_dart(*this, "dart") , m_ctc(*this, "ctc") , m_fdc(*this, "fdc") , m_floppy0(*this, "fdc:0") { } void ampro(machine_config &config); void init_ampro(); protected: virtual void machine_reset() override; private: TIMER_DEVICE_CALLBACK_MEMBER(ctc_tick); DECLARE_WRITE8_MEMBER(port00_w); DECLARE_READ8_MEMBER(io_r); DECLARE_WRITE8_MEMBER(io_w); void ampro_io(address_map &map); void ampro_mem(address_map &map); required_device m_maincpu; required_device m_dart; required_device m_ctc; required_device m_fdc; required_device m_floppy0; }; /* d0..d3 Drive select 0-3 (we only emulate 1 drive) d4 Side select 0=side0 d5 /DDEN d6 Banking 0=rom d7 FDC master clock 0=8MHz 1=16MHz (for 20cm disks, not emulated) */ WRITE8_MEMBER( ampro_state::port00_w ) { membank("bankr0")->set_entry(BIT(data, 6)); m_fdc->dden_w(BIT(data, 5)); floppy_image_device *floppy = nullptr; if (BIT(data, 0)) floppy = m_floppy0->get_device(); m_fdc->set_floppy(floppy); if (floppy) floppy->ss_w(BIT(data, 4)); } READ8_MEMBER( ampro_state::io_r ) { if (offset < 0x40) return m_ctc->read(space, offset>>4); else return m_dart->ba_cd_r(space, offset>>2); } WRITE8_MEMBER( ampro_state::io_w ) { if (offset < 0x40) m_ctc->write(space, offset>>4, data); else m_dart->ba_cd_w(space, offset>>2, data); } void ampro_state::ampro_mem(address_map &map) { map.unmap_value_high(); map(0x0000, 0x0fff).bankr("bankr0").bankw("bankw0"); map(0x1000, 0xffff).ram(); } void ampro_state::ampro_io(address_map &map) { map.unmap_value_high(); map.global_mask(0xff); map(0x00, 0x00).w(FUNC(ampro_state::port00_w)); // system //AM_RANGE(0x01, 0x01) AM_WRITE(port01_w) // printer data //AM_RANGE(0x02, 0x03) AM_WRITE(port02_w) // printer strobe //AM_RANGE(0x20, 0x27) AM_READWRITE() // scsi chip //AM_RANGE(0x28, 0x28) AM_WRITE(port28_w) // scsi control //AM_RANGE(0x29, 0x29) AM_READ(port29_r) // ID port map(0x40, 0x8f).rw(FUNC(ampro_state::io_r), FUNC(ampro_state::io_w)); map(0xc0, 0xc3).w(m_fdc, FUNC(wd1772_device::write)); map(0xc4, 0xc7).r(m_fdc, FUNC(wd1772_device::read)); } static const z80_daisy_config daisy_chain_intf[] = { { "ctc" }, { "dart" }, { nullptr } }; static void ampro_floppies(device_slot_interface &device) { device.option_add("525dd", FLOPPY_525_DD); } /* Input ports */ static INPUT_PORTS_START( ampro ) INPUT_PORTS_END void ampro_state::machine_reset() { membank("bankr0")->set_entry(0); // point at rom membank("bankw0")->set_entry(0); // always write to ram } void ampro_state::init_ampro() { uint8_t *main = memregion("maincpu")->base(); membank("bankr0")->configure_entry(1, &main[0x0000]); membank("bankr0")->configure_entry(0, &main[0x10000]); membank("bankw0")->configure_entry(0, &main[0x0000]); } void ampro_state::ampro(machine_config &config) { /* basic machine hardware */ Z80(config, m_maincpu, 16_MHz_XTAL / 4); m_maincpu->set_addrmap(AS_PROGRAM, &ro_state::ampro_mem); m_maincpu->set_addrmap(AS_IO, &ro_state::ampro_io); m_maincpu->set_daisy_config(daisy_chain_intf); /* Devices */ Z80CTC(config, m_ctc, 16_MHz_XTAL / 4); m_ctc->intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_ctc->set_clk<0>(16_MHz_XTAL / 8); // 2MHz m_ctc->set_clk<1>(16_MHz_XTAL / 8); // 2MHz m_ctc->zc_callback<0>().set(m_dart, FUNC(z80dart_device::txca_w)); // Z80DART Ch A, SIO Ch A m_ctc->zc_callback<0>().append(m_dart, FUNC(z80dart_device::rxca_w)); m_ctc->zc_callback<1>().set(m_dart, FUNC(z80dart_device::rxtxcb_w)); // SIO Ch B Z80DART(config, m_dart, 16_MHz_XTAL / 4); m_dart->out_txda_callback().set("rs232", FUNC(rs232_port_device::write_txd)); m_dart->out_dtra_callback().set("rs232", FUNC(rs232_port_device::write_dtr)); m_dart->out_rtsa_callback().set("rs232", FUNC(rs232_port_device::write_rts)); m_dart->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, "terminal")); rs232.rxd_handler().set(m_dart, FUNC(z80dart_device::rxa_w)); WD1772(config, m_fdc, 16_MHz_XTAL / 2); FLOPPY_CONNECTOR(config, "fdc:0", ampro_floppies, "525dd", floppy_image_device::default_floppy_formats).enable_sound(true); SOFTWARE_LIST(config, "flop_list").set_original("ampro"); } /* ROM definition */ ROM_START( ampro ) ROM_REGION( 0x11000, "maincpu", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS( 0, "mntr", "Monitor") ROMX_LOAD( "mntr", 0x10000, 0x1000, CRC(d59d0909) SHA1(936410f414b1e71445253840eea0045545e4ff0b), ROM_BIOS(0)) ROM_SYSTEM_BIOS( 1, "boot", "Boot") ROMX_LOAD( "boot", 0x10000, 0x1000, CRC(b3524046) SHA1(5466f7d28c1a04cfbf328095cb35ad1525e91f44), ROM_BIOS(1)) ROM_SYSTEM_BIOS( 2, "scsi", "SCSI Boot") ROMX_LOAD( "scsi", 0x10000, 0x1000, CRC(8eb20e5d) SHA1(0ab1ff65cf6d3c1a713a8ac5c1ee4c662ac3da0c), ROM_BIOS(2)) ROM_END /* Driver */ // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1980, ampro, 0, 0, ampro, ampro, ampro_state, init_ampro, "Ampro", "Little Z80 Board", 0 )