// license:GPL-2.0+ // copyright-holders:Dirk Best /*************************************************************************** ACT Apricot PC/Xi TODO: - External RS232 data transfers to the Apricot are usually garbage (but sending to an external target works fine) - Dump of the keyboard MCU ROM needed (can be dumped using test mode) ***************************************************************************/ #include "emu.h" #include "bus/apricot/expansion/expansion.h" #include "bus/apricot/keyboard/keyboard.h" #include "bus/centronics/ctronics.h" #include "bus/rs232/rs232.h" #include "cpu/i86/i86.h" #include "cpu/i8089/i8089.h" #include "formats/apridisk.h" #include "imagedev/floppy.h" #include "machine/clock.h" #include "machine/ram.h" #include "machine/74153.h" #include "machine/i8255.h" #include "machine/pic8259.h" #include "machine/pit8253.h" #include "machine/wd_fdc.h" #include "machine/z80sio.h" #include "sound/sn76496.h" #include "video/mc6845.h" #include "emupal.h" #include "screen.h" #include "softlist.h" #include "speaker.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class apricot_state : public driver_device { public: apricot_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_cpu(*this, "ic91"), m_iop(*this, "ic71"), m_ram(*this, RAM_TAG), m_crtc(*this, "ic30"), m_ppi(*this, "ic17"), m_pic(*this, "ic31"), m_pit(*this, "ic16"), m_sio(*this, "ic15"), m_rs232(*this, "rs232"), m_centronics(*this, "centronics"), m_fdc(*this, "ic68"), m_floppy0(*this, "ic68:0"), m_floppy1(*this, "ic68:1"), m_palette(*this, "palette"), m_exp(*this, "exp"), m_screen_buffer(*this, "screen_buffer"), m_video_mode(0), m_display_on(1), m_display_enabled(0), m_centronics_fault(1), m_centronics_perror(1), m_bus_locked(0) { } void apricot(machine_config &config); void apricotxi(machine_config &config); private: DECLARE_FLOPPY_FORMATS(floppy_formats); DECLARE_WRITE_LINE_MEMBER(i8086_lock_w); DECLARE_WRITE8_MEMBER(i8089_ca1_w); DECLARE_WRITE8_MEMBER(i8089_ca2_w); DECLARE_WRITE8_MEMBER(i8255_portb_w); DECLARE_READ8_MEMBER(i8255_portc_r); DECLARE_WRITE8_MEMBER(i8255_portc_w); DECLARE_WRITE_LINE_MEMBER(fdc_intrq_w); DECLARE_READ8_MEMBER(sio_da_r); DECLARE_READ8_MEMBER(sio_ca_r); DECLARE_READ8_MEMBER(sio_db_r); DECLARE_READ8_MEMBER(sio_cb_r); DECLARE_WRITE_LINE_MEMBER(write_centronics_fault); DECLARE_WRITE_LINE_MEMBER(write_centronics_perror); DECLARE_WRITE_LINE_MEMBER(apricot_hd6845_de) { m_display_enabled = state; }; MC6845_UPDATE_ROW(crtc_update_row); uint32_t screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); void apricot_io(address_map &map); void apricot_mem(address_map &map); virtual void machine_start() override; required_device m_cpu; required_device m_iop; required_device m_ram; required_device m_crtc; required_device m_ppi; required_device m_pic; required_device m_pit; required_device m_sio; required_device m_rs232; required_device m_centronics; required_device m_fdc; required_device m_floppy0; required_device m_floppy1; required_device m_palette; required_device m_exp; required_shared_ptr m_screen_buffer; bool m_video_mode; bool m_display_on; int m_display_enabled; int m_centronics_fault; int m_centronics_perror; int m_bus_locked; }; //************************************************************************** // I/O //************************************************************************** WRITE8_MEMBER( apricot_state::i8089_ca1_w ) { m_iop->sel_w(0); m_iop->ca_w(1); m_iop->ca_w(0); } WRITE8_MEMBER( apricot_state::i8089_ca2_w ) { m_iop->sel_w(1); m_iop->ca_w(1); m_iop->ca_w(0); } WRITE_LINE_MEMBER( apricot_state::write_centronics_fault ) { m_centronics_fault = state; m_sio->syncb_w(state); m_ppi->pc2_w(state); } WRITE_LINE_MEMBER( apricot_state::write_centronics_perror ) { m_centronics_perror = state; } READ8_MEMBER( apricot_state::i8255_portc_r ) { uint8_t data = 0; data |= m_centronics_perror << 0; // schematic page 294 says pc1 is centronics pin 34, which is n/c. data |= m_centronics_fault << 2; data |= m_display_enabled << 3; return data; } WRITE8_MEMBER( apricot_state::i8255_portb_w ) { // bit 0, crt reset // bit 1, not connected m_display_on = BIT(data, 3); m_video_mode = BIT(data, 4); floppy_image_device *floppy = nullptr; // bit 5, enable disk select // bit 6, disk select if (!BIT(data, 5)) floppy = BIT(data, 6) ? m_floppy1->get_device() : m_floppy0->get_device(); m_fdc->set_floppy(floppy); // bit 2, head load (motor on is wired to be active once a disk has been inserted) // we just let the motor run all the time for now if (floppy) floppy->mon_w(0); // switch video modes m_crtc->set_unscaled_clock(15_MHz_XTAL / (m_video_mode ? 10 : 16)); m_crtc->set_hpixels_per_column(m_video_mode ? 10 : 16); // PB7 Centronics transceiver direction. 0 = output, 1 = input } WRITE8_MEMBER( apricot_state::i8255_portc_w ) { // schematic page 294 says pc4 outputs to centronics pin 13, which is the "select" output from the printer. m_centronics->write_strobe(BIT(data, 5)); // schematic page 294 says pc6 outputs to centronics pin 15, which is unused } READ8_MEMBER( apricot_state::sio_da_r ) { if (m_bus_locked) return m_sio->m1_r(); return m_sio->da_r(); } READ8_MEMBER( apricot_state::sio_ca_r ) { if (m_bus_locked) return m_sio->m1_r(); return m_sio->ca_r(); } READ8_MEMBER( apricot_state::sio_cb_r ) { if (m_bus_locked) return m_sio->m1_r(); return m_sio->cb_r(); } READ8_MEMBER( apricot_state::sio_db_r ) { if (m_bus_locked) return m_sio->m1_r(); return m_sio->db_r(); } //************************************************************************** // FLOPPY //************************************************************************** WRITE_LINE_MEMBER( apricot_state::fdc_intrq_w ) { m_pic->ir4_w(state); m_iop->ext1_w(state); } FLOPPY_FORMATS_MEMBER( apricot_state::floppy_formats ) FLOPPY_APRIDISK_FORMAT FLOPPY_FORMATS_END static void apricot_floppies(device_slot_interface &device) { device.option_add("d31v", SONY_OA_D31V); device.option_add("d32w", SONY_OA_D32W); } //************************************************************************** // VIDEO EMULATION //************************************************************************** uint32_t apricot_state::screen_update_apricot(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { if (!m_display_on) m_crtc->screen_update(screen, bitmap, cliprect); else bitmap.fill(rgb_t::black(), cliprect); return 0; } MC6845_UPDATE_ROW( apricot_state::crtc_update_row ) { const pen_t *pen = m_palette->pens(); for (int i = 0; i < x_count; i++) { uint16_t code = m_screen_buffer[(ma + i) & 0x7ff]; uint16_t offset = ((code & 0x7ff) << 5) | (ra << 1); uint16_t data = m_cpu->space(AS_PROGRAM).read_word(offset); if (m_video_mode) { int fill = 0; if (i == cursor_x) fill = 1; // cursor? if (BIT(code, 12) && BIT(data, 14)) fill = 1; // strike-through? if (BIT(code, 13) && BIT(data, 15)) fill = 1; // underline? // draw 10 pixels of the character for (int x = 0; x <= 10; x++) { int color = fill ? 1 : BIT(data, x); color ^= BIT(code, 15); // reverse? bitmap.pix32(y, x + i*10) = pen[color ? 1 + BIT(code, 14) : 0]; } } else { // draw 16 pixels of the cell for (int x = 0; x <= 16; x++) bitmap.pix32(y, x + i*16) = pen[BIT(data, x)]; } } } //************************************************************************** // MACHINE EMULATION //************************************************************************** void apricot_state::machine_start() { membank("ram")->set_base(m_ram->pointer()); } WRITE_LINE_MEMBER( apricot_state::i8086_lock_w ) { m_bus_locked = state; } //************************************************************************** // ADDRESS MAPS //************************************************************************** void apricot_state::apricot_mem(address_map &map) { map(0x00000, 0x3ffff).bankrw("ram"); map(0xf0000, 0xf0fff).mirror(0x7000).ram().share("screen_buffer"); map(0xf8000, 0xfbfff).mirror(0x4000).rom().region("bootstrap", 0); } void apricot_state::apricot_io(address_map &map) { map(0x00, 0x03).rw(m_pic, FUNC(pic8259_device::read), FUNC(pic8259_device::write)).umask16(0x00ff); map(0x40, 0x47).rw(m_fdc, FUNC(wd2797_device::read), FUNC(wd2797_device::write)).umask16(0x00ff); map(0x48, 0x4f).rw(m_ppi, FUNC(i8255_device::read), FUNC(i8255_device::write)).umask16(0x00ff); map(0x50, 0x50).mirror(0x06).w("ic7", FUNC(sn76489_device::write)); map(0x58, 0x5f).rw(m_pit, FUNC(pit8253_device::read), FUNC(pit8253_device::write)).umask16(0x00ff); map(0x60, 0x60).r(FUNC(apricot_state::sio_da_r)).w(m_sio, FUNC(z80sio_device::da_w)).umask16(0x00ff); map(0x62, 0x62).r(FUNC(apricot_state::sio_ca_r)).w(m_sio, FUNC(z80sio_device::ca_w)).umask16(0x00ff); map(0x64, 0x64).r(FUNC(apricot_state::sio_db_r)).w(m_sio, FUNC(z80sio_device::db_w)).umask16(0x00ff); map(0x66, 0x66).r(FUNC(apricot_state::sio_cb_r)).w(m_sio, FUNC(z80sio_device::cb_w)).umask16(0x00ff); map(0x68, 0x68).mirror(0x04).w(m_crtc, FUNC(hd6845s_device::address_w)); map(0x6a, 0x6a).mirror(0x04).rw(m_crtc, FUNC(hd6845s_device::register_r), FUNC(hd6845s_device::register_w)); map(0x70, 0x70).mirror(0x04).w(FUNC(apricot_state::i8089_ca1_w)); map(0x72, 0x72).mirror(0x04).w(FUNC(apricot_state::i8089_ca2_w)); map(0x78, 0x7f).noprw(); // unavailable } //************************************************************************** // MACHINE DRIVERS //************************************************************************** void apricot_state::apricot(machine_config &config) { // main cpu I8086(config, m_cpu, 15_MHz_XTAL / 3); m_cpu->set_addrmap(AS_PROGRAM, &apricot_state::apricot_mem); m_cpu->set_addrmap(AS_IO, &apricot_state::apricot_io); m_cpu->set_irq_acknowledge_callback("ic31", FUNC(pic8259_device::inta_cb)); m_cpu->lock_handler().set(FUNC(apricot_state::i8086_lock_w)); // i/o cpu I8089(config, m_iop, 15_MHz_XTAL / 3); m_iop->set_addrmap(AS_PROGRAM, &apricot_state::apricot_mem); m_iop->set_addrmap(AS_IO, &apricot_state::apricot_io); m_iop->set_data_width(16); m_iop->sintr1().set(m_pic, FUNC(pic8259_device::ir0_w)); m_iop->sintr2().set(m_pic, FUNC(pic8259_device::ir1_w)); // ram RAM(config, RAM_TAG).set_default_size("256K"); // video hardware screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_color(rgb_t::green()); screen.set_size(800, 400); screen.set_visarea(0, 800-1, 0, 400-1); screen.set_refresh_hz(72); screen.set_screen_update(FUNC(apricot_state::screen_update_apricot)); PALETTE(config, m_palette, palette_device::MONOCHROME_HIGHLIGHT); HD6845S(config, m_crtc, 15_MHz_XTAL / 10); m_crtc->set_screen("screen"); m_crtc->set_show_border_area(false); m_crtc->set_char_width(10); m_crtc->set_update_row_callback(FUNC(apricot_state::crtc_update_row)); m_crtc->out_de_callback().set(FUNC(apricot_state::apricot_hd6845_de)); // sound hardware SPEAKER(config, "mono").front_center(); SN76489(config, "ic7", 4_MHz_XTAL / 2).add_route(ALL_OUTPUTS, "mono", 1.0); // devices I8255A(config, m_ppi, 0); m_ppi->in_pa_callback().set("cent_data_in", FUNC(input_buffer_device::bus_r)); m_ppi->out_pa_callback().set("cent_data_out", FUNC(output_latch_device::bus_w)); m_ppi->out_pb_callback().set(FUNC(apricot_state::i8255_portb_w)); m_ppi->in_pc_callback().set(FUNC(apricot_state::i8255_portc_r)); m_ppi->out_pc_callback().set(FUNC(apricot_state::i8255_portc_w)); PIC8259(config, m_pic, 0); m_pic->out_int_callback().set_inputline(m_cpu, 0); PIT8253(config, m_pit, 0); m_pit->set_clk<0>(4_MHz_XTAL / 16); m_pit->out_handler<0>().set(m_pic, FUNC(pic8259_device::ir6_w)); m_pit->set_clk<1>(4_MHz_XTAL / 2); m_pit->out_handler<1>().set("ic14", FUNC(ttl153_device::i0a_w)); m_pit->set_clk<2>(4_MHz_XTAL / 2); m_pit->out_handler<2>().set("ic14", FUNC(ttl153_device::i0b_w)); m_pit->out_handler<2>().append("ic14", FUNC(ttl153_device::i2a_w)); m_pit->out_handler<2>().append("ic14", FUNC(ttl153_device::i2b_w)); ttl153_device &ttl74153(TTL153(config, "ic14")); ttl74153.za_cb().set("ic15", FUNC(z80sio_device::rxca_w)); ttl74153.zb_cb().set("ic15", FUNC(z80sio_device::txca_w)); CLOCK(config, "ic15_rxtxcb", 4_MHz_XTAL / 16).signal_handler().set(m_sio, FUNC(z80sio_device::rxtxcb_w)); Z80SIO(config, m_sio, 15_MHz_XTAL / 6); m_sio->set_cputag(m_cpu); m_sio->out_txda_callback().set(m_rs232, FUNC(rs232_port_device::write_txd)); m_sio->out_dtra_callback().set(m_rs232, FUNC(rs232_port_device::write_dtr)); m_sio->out_rtsa_callback().set(m_rs232, FUNC(rs232_port_device::write_rts)); m_sio->out_wrdya_callback().set(m_iop, FUNC(i8089_device::drq2_w)); m_sio->out_txdb_callback().set("kbd", FUNC(apricot_keyboard_bus_device::out_w)); m_sio->out_dtrb_callback().set("ic14", FUNC(ttl153_device::s0_w)); m_sio->out_rtsb_callback().set("ic14", FUNC(ttl153_device::s1_w)); m_sio->out_int_callback().set(m_pic, FUNC(pic8259_device::ir5_w)); // rs232 port RS232_PORT(config, m_rs232, default_rs232_devices, nullptr); // note: missing a receive clock callback to support external clock mode (i1 to 153) m_rs232->rxd_handler().set(m_sio, FUNC(z80sio_device::rxa_w)); m_rs232->dcd_handler().set(m_sio, FUNC(z80sio_device::dcda_w)); m_rs232->dsr_handler().set(m_sio, FUNC(z80sio_device::synca_w)); m_rs232->cts_handler().set(m_sio, FUNC(z80sio_device::ctsa_w)).invert(); // keyboard APRICOT_KEYBOARD_INTERFACE(config, "kbd", apricot_keyboard_devices, "hle").in_handler().set(m_sio, FUNC(z80sio_device::rxb_w)); // centronics printer CENTRONICS(config, m_centronics, centronics_devices, "printer"); m_centronics->set_data_input_buffer("cent_data_in"); m_centronics->ack_handler().set(m_sio, FUNC(z80sio_device::ctsb_w)); m_centronics->busy_handler().set(m_sio, FUNC(z80sio_device::dcdb_w)); m_centronics->fault_handler().set(FUNC(apricot_state::write_centronics_fault)); m_centronics->perror_handler().set(FUNC(apricot_state::write_centronics_perror)); //m_centronics->select_handler().set(); // schematic page 294 says this is connected to pc4, but that is an output to the printer INPUT_BUFFER(config, "cent_data_in"); output_latch_device ¢_data_out(OUTPUT_LATCH(config, "cent_data_out")); m_centronics->set_output_latch(cent_data_out); // floppy WD2797(config, m_fdc, 4_MHz_XTAL / 2); m_fdc->intrq_wr_callback().set(FUNC(apricot_state::fdc_intrq_w)); m_fdc->drq_wr_callback().set(m_iop, FUNC(i8089_device::drq1_w)); FLOPPY_CONNECTOR(config, "ic68:0", apricot_floppies, "d32w", apricot_state::floppy_formats); FLOPPY_CONNECTOR(config, "ic68:1", apricot_floppies, "d32w", apricot_state::floppy_formats); SOFTWARE_LIST(config, "flop_list").set_original("apricot_flop"); // expansion bus APRICOT_EXPANSION_BUS(config, m_exp, 0); m_exp->set_program_space(m_cpu, AS_PROGRAM); m_exp->set_io_space(m_cpu, AS_IO); m_exp->set_program_iop_space(m_iop, AS_PROGRAM); m_exp->set_io_iop_space(m_iop, AS_IO); m_exp->int2().set(m_pic, FUNC(pic8259_device::ir2_w)); m_exp->int3().set(m_pic, FUNC(pic8259_device::ir3_w)); APRICOT_EXPANSION_SLOT(config, "exp:1", apricot_expansion_cards, nullptr); APRICOT_EXPANSION_SLOT(config, "exp:2", apricot_expansion_cards, nullptr); } void apricot_state::apricotxi(machine_config &config) { apricot(config); } //************************************************************************** // ROM DEFINITIONS //************************************************************************** ROM_START( apricot ) ROM_REGION16_LE(0x4000, "bootstrap", 0) ROM_LOAD16_BYTE("pc_bios_lo_001.bin", 0x0000, 0x2000, CRC(0c217cc2) SHA1(0d7a2b61e17966462b555115f962a175fadcf72a)) ROM_LOAD16_BYTE("pc_bios_hi_001.bin", 0x0001, 0x2000, CRC(7c27f36c) SHA1(c801bbf904815f76ec6463e948f57e0118a26292)) ROM_END ROM_START( apricotxi ) ROM_REGION16_LE(0x4000, "bootstrap", 0) ROM_LOAD16_BYTE("lo_ve007.u11", 0x0000, 0x2000, CRC(e74e14d1) SHA1(569133b0266ce3563b21ae36fa5727308797deee)) // LO Ve007 03.04.84 ROM_LOAD16_BYTE("hi_ve007.u9", 0x0001, 0x2000, CRC(b04fb83e) SHA1(cc2b2392f1b4c04bb6ec8ee26f8122242c02e572)) // HI Ve007 03.04.84 ROM_END //************************************************************************** // GAME DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1983, apricot, 0, 0, apricot, 0, apricot_state, empty_init, "ACT", "Apricot PC", 0 ) COMP( 1984, apricotxi, apricot, 0, apricotxi, 0, apricot_state, empty_init, "ACT", "Apricot Xi", 0 )