// license:BSD-3-Clause // copyright-holders:AJR /**************************************************************************** Preliminary driver for Facit 4440 Twist terminal. The “Twist” sobriquet refers to the adjustable orientation of the monitor, whose normally black-on-white display has the dimensions of a sheet of A4 paper. It displays 24 lines of 80 characters in landscape mode and 72 lines of rather smaller characters in portrait mode. No user manual for this terminal has been found. The layout of the keyboard is also unclear, not to mention the serial protocol. Nonvolatile settings are configured through VT100-style setup screens. Several non-ANSI emulation modes are also available. An OEM customized version was sold by Norsk Data AS as the ND 319 Twist. Micro-Term apparently distributed this terminal in the US. The timing of the display circuit seems a bit uncertain. Promotional information claims that it has a 40 MHz bandwidth, but this may be only a nominal maximum rating since the only high-frequency oscillator seen on the PCB is 32 MHz, and schematics label this as 30 MHz. It is unclear how the CRTC parameters and this value can produce the documented 65 Hz refresh rate. The actual circuit also generates alarming levels of electromagnetic radiation. ****************************************************************************/ #include "emu.h" #include "bus/rs232/rs232.h" #include "cpu/z80/z80.h" #include "cpu/m6800/m6801.h" #include "machine/clock.h" #include "machine/er1400.h" #include "machine/ripple_counter.h" #include "machine/z80ctc.h" #include "machine/z80sio.h" #include "sound/spkrdev.h" #include "video/mc6845.h" #include "screen.h" #include "speaker.h" class facit4440_state : public driver_device { public: facit4440_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_earom(*this, "earom%u", 1U) , m_crtc(*this, "crtc") , m_bellctr(*this, "bellctr") , m_rs232(*this, "rs232") , m_printer(*this, "printer") , m_test(*this, "TEST") , m_orientation(*this, "ORIENTATION") , m_chargen(*this, "chargen") , m_scanprom(*this, "scanprom") , m_videoram(*this, "videoram") { } void facit4440(machine_config &config); protected: virtual void machine_start() override; private: void earom_latch_w(u8 data); void control_2000_w(u8 data); u8 misc_status_r(); void control_6000_w(u8 data); void control_a000_w(u8 data); DECLARE_WRITE_LINE_MEMBER(vsync_w); MC6845_UPDATE_ROW(update_row); void mem_map(address_map &map); void io_map(address_map &map); required_device m_maincpu; required_device_array m_earom; required_device m_crtc; required_device m_bellctr; required_device m_rs232; required_device m_printer; required_ioport m_test; required_ioport m_orientation; required_region_ptr m_chargen; required_region_ptr m_scanprom; required_shared_ptr m_videoram; u8 m_control_latch[3]; }; void facit4440_state::earom_latch_w(u8 data) { // SN74LS174 latch + SN7406 inverter // Prevent outputs from interfering with data reads if (!BIT(data, 2)) data &= 0xfc; // FIXME: clock must be written first here due to data/control setup time m_earom[0]->clock_w(BIT(data, 5)); m_earom[1]->clock_w(BIT(data, 5)); m_earom[0]->data_w(BIT(data, 0)); m_earom[1]->data_w(BIT(data, 1)); for (auto &earom : m_earom) { earom->c2_w(BIT(data, 2)); earom->c1_w(BIT(data, 3)); earom->c3_w(BIT(data, 4)); } } void facit4440_state::control_2000_w(u8 data) { m_control_latch[0] = data; m_bellctr->reset_w(BIT(data, 5)); if (!BIT(m_control_latch[0], 6)) m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); } void facit4440_state::control_6000_w(u8 data) { m_control_latch[1] = data; } void facit4440_state::control_a000_w(u8 data) { m_control_latch[2] = data; } u8 facit4440_state::misc_status_r() { u8 status = m_test->read() << 6; status |= m_earom[1]->data_r() << 4; status |= m_earom[0]->data_r() << 3; status |= m_crtc->hsync_r() << 2; status |= m_crtc->vsync_r() << 1; status |= m_orientation->read(); return status; } WRITE_LINE_MEMBER(facit4440_state::vsync_w) { if (state && BIT(m_control_latch[0], 5)) m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); } MC6845_UPDATE_ROW(facit4440_state::update_row) { // FIXME: MA does not determine video addressing at all here offs_t base = ma / 5 * 6; u32 *px = &bitmap.pix(y); for (int i = 0; i < x_count; i++) { u8 chr = m_videoram[(base + i) & 0x1fff]; rgb_t fg = rgb_t::white(); rgb_t bg = rgb_t::black(); // TODO: double-width scans based on attributes u8 scan = m_scanprom[ra | (BIT(m_control_latch[1], 7) ? 0x20 : 0x00)]; u8 dots = m_chargen[(u16(chr) << 5) | (scan & 0x1f)]; for (int n = 8; n > 0; n--, dots <<= 1) *px++ = BIT(dots, 7) ? fg : bg; } } void facit4440_state::mem_map(address_map &map) { map(0x0000, 0x7fff).rom().region("mainprg", 0); map(0x0000, 0x0000).w(FUNC(facit4440_state::earom_latch_w)); map(0x2000, 0x2000).w(FUNC(facit4440_state::control_2000_w)); map(0x4000, 0x4000).mirror(0x1ffe).w("crtc", FUNC(mc6845_device::address_w)); map(0x4001, 0x4001).mirror(0x1ffe).w("crtc", FUNC(mc6845_device::register_w)); map(0x6000, 0x6000).w(FUNC(facit4440_state::control_6000_w)); map(0x8000, 0x8000).r(FUNC(facit4440_state::misc_status_r)); map(0x8000, 0x8050).nopw(); map(0xa000, 0xbfff).rom().region("testprg", 0); map(0xa000, 0xa000).w(FUNC(facit4440_state::control_a000_w)); map(0xc000, 0xdfff).ram().share("videoram"); // 4x TMM2016AP-90 map(0xe000, 0xffff).ram(); // 4x TMM2016AP-90 } void facit4440_state::io_map(address_map &map) { map.global_mask(0xff); map(0xec, 0xef).rw("kbdart", FUNC(z80dart_device::cd_ba_r), FUNC(z80dart_device::cd_ba_w)); map(0xf4, 0xf7).rw("iodart", FUNC(z80dart_device::cd_ba_r), FUNC(z80dart_device::cd_ba_w)); map(0xf8, 0xfb).rw("ctc", FUNC(z80ctc_device::read), FUNC(z80ctc_device::write)); } void facit4440_state::machine_start() { subdevice("kbdart")->rxb_w(0); m_control_latch[0] = m_control_latch[1] = m_control_latch[2] = 0; save_item(NAME(m_control_latch)); } static INPUT_PORTS_START(facit4440) PORT_START("TEST") PORT_DIPNAME(3, 0, "Test Mode") PORT_DIPLOCATION("W7/W4:1,2") PORT_DIPSETTING(0, DEF_STR(Off)) PORT_DIPSETTING(3, DEF_STR(On)) PORT_DIPSETTING(2, "Burn In") PORT_START("ORIENTATION") PORT_CONFNAME(1, 1, "Orientation") PORT_CONFSETTING(0, "Portrait") PORT_CONFSETTING(1, "Landscape") INPUT_PORTS_END static const z80_daisy_config daisy_chain[] = { { "ctc" }, { "iodart" }, { "kbdart" }, { nullptr } }; void facit4440_state::facit4440(machine_config &config) { constexpr XTAL DOT_CLOCK = 32_MHz_XTAL; // XTAL is 30 MHz according to schematics Z80(config, m_maincpu, 32_MHz_XTAL / 8); // divider confirmed from schematics m_maincpu->set_addrmap(AS_PROGRAM, &facit4440_state::mem_map); m_maincpu->set_addrmap(AS_IO, &facit4440_state::io_map); m_maincpu->set_daisy_config(daisy_chain); ER1400(config, m_earom[0]); // M5G1400P @ D65 ER1400(config, m_earom[1]); // M5G1400P @ D64 z80ctc_device &ctc(Z80CTC(config, "ctc", 32_MHz_XTAL / 8)); ctc.intr_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); ctc.set_clk<0>(2.4576_MHz_XTAL / 4); ctc.set_clk<1>(2.4576_MHz_XTAL / 4); ctc.set_clk<2>(2.4576_MHz_XTAL / 4); ctc.zc_callback<0>().set("iodart", FUNC(z80dart_device::txca_w)); ctc.zc_callback<1>().set("iodart", FUNC(z80dart_device::rxca_w)); ctc.zc_callback<2>().set("iodart", FUNC(z80dart_device::txcb_w)); ctc.zc_callback<2>().append("iodart", FUNC(z80dart_device::rxcb_w)); clock_device &keybclk(CLOCK(config, "kbdclk", 2.4576_MHz_XTAL / 32)); // divider confirmed from schematics keybclk.signal_handler().set("kbdart", FUNC(z80dart_device::txca_w)); keybclk.signal_handler().append("kbdart", FUNC(z80dart_device::rxca_w)); z80dart_device &iodart(Z80DART(config, "iodart", 32_MHz_XTAL / 8)); // Z80ADART @ D83 iodart.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); iodart.out_txda_callback().set(m_rs232, FUNC(rs232_port_device::write_txd)); iodart.out_rtsa_callback().set(m_rs232, FUNC(rs232_port_device::write_rts)); iodart.out_dtra_callback().set(m_printer, FUNC(rs232_port_device::write_dtr)); // not correct according to schematics, but needed to pass burn-in test iodart.out_txdb_callback().set(m_printer, FUNC(rs232_port_device::write_txd)); z80dart_device &kbdart(Z80DART(config, "kbdart", 32_MHz_XTAL / 8)); // Z80ADART @ D82 kbdart.out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); kbdart.out_txda_callback().set("kbdart", FUNC(z80dart_device::rxa_w)); // FIXME: serial keyboard needed here // Channel B is not used (though schematics show 307.2 kHz provided for RxTxCB) M6801(config, "kbdmcu", 2.4576_MHz_XTAL).set_disable(); // exact type unknown screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_raw(DOT_CLOCK, 103 * 8, 0, 80 * 8, 621, 0, 500); //screen.set_raw(DOT_CLOCK, 103 * 8, 0, 80 * 8, 621, 0, 560); screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update)); MC6845(config, m_crtc, DOT_CLOCK / 8); // HD46505SP-2 m_crtc->set_char_width(8); m_crtc->set_show_border_area(false); m_crtc->set_update_row_callback(FUNC(facit4440_state::update_row)); m_crtc->out_hsync_callback().set("ctc", FUNC(z80ctc_device::trg3)); m_crtc->out_hsync_callback().append(m_bellctr, FUNC(ripple_counter_device::clock_w)); m_crtc->out_vsync_callback().set(FUNC(facit4440_state::vsync_w)); RIPPLE_COUNTER(config, m_bellctr).set_stages(12); // HEF4040BP m_bellctr->count_out_cb().set("speaker", FUNC(speaker_sound_device::level_w)).bit(5); SPEAKER(config, "mono").front_center(); SPEAKER_SOUND(config, "speaker").add_route(ALL_OUTPUTS, "mono", 0.5); RS232_PORT(config, m_rs232, default_rs232_devices, "loopback"); // temporary loopback for testing m_rs232->rxd_handler().set("iodart", FUNC(z80dart_device::rxa_w)); m_rs232->cts_handler().set("iodart", FUNC(z80dart_device::ctsa_w)); m_rs232->dcd_handler().set("iodart", FUNC(z80dart_device::dcda_w)); RS232_PORT(config, m_printer, default_rs232_devices, "loopback"); // temporary loopback for testing m_printer->rxd_handler().set("iodart", FUNC(z80dart_device::rxb_w)); m_printer->dcd_handler().set("iodart", FUNC(z80dart_device::dcdb_w)); } ROM_START(facit4440) ROM_REGION(0x8000, "mainprg", 0) ROM_LOAD("rom7.bin", 0x0000, 0x4000, CRC(a8da2b11) SHA1(4436ef14c29ae299f7bc338748158771c02d02a9)) ROM_LOAD("rom6.bin", 0x4000, 0x4000, CRC(790b7642) SHA1(688a80cbf011e5c14f501e11fe0e3bf64a85bbd7)) ROM_REGION(0x1000, "kbdmcu", 0) ROM_LOAD("6801.bin", 0x0000, 0x1000, NO_DUMP) ROM_REGION(0x2000, "testprg", 0) ROM_LOAD("rom5.bin", 0x0000, 0x2000, CRC(715d02b6) SHA1(e304718dbdc8867ac01909fd2d027e5014a8c4f9)) ROM_REGION(0x3000, "chargen", 0) // order unknown ROM_LOAD("rom1.bin", 0x0000, 0x1000, CRC(b503c173) SHA1(209bf59e2e9953179d04c4e768fc41574e039d36)) ROM_LOAD("rom3.bin", 0x1000, 0x1000, CRC(a55a25d9) SHA1(c0d321e65f214adee01bf5f8c495b2518fa31b7b)) ROM_LOAD("rom4.bin", 0x2000, 0x1000, CRC(52004ef8) SHA1(50d6e2eb48f60db3a3c9d206fc40d3294b6adc0e)) ROM_REGION(0x0800, "scanprom", 0) ROM_LOAD("rom2.bin", 0x0000, 0x0800, CRC(9e1a190c) SHA1(fb08ee806f1056bcdfb5b08ea85995e1d3d01298)) ROM_END COMP(1984, facit4440, 0, 0, facit4440, facit4440, facit4440_state, empty_init, "Facit", "4440 Twist (30M-F1)", MACHINE_NOT_WORKING | MACHINE_IMPERFECT_GRAPHICS)