// license:BSD-3-Clause // copyright-holders:Curt Coder /* Luxor ABC 80 PCB Layout ---------- 55 10470-02 CN1 CN2 CN5 SW1 |-----| |------------------------| |-----| |-------| |--| |----------------------------------| |---| | CN3 CN4 | | 7912 | | MC1488 | | MC1489 7812 | | LS245 LS138 | | |-------| | | |-----CN6-----| LS241 LS241 LS138 LS32 |SN76477| LS04 LM339 | | |-------| | | |--------------| |------------| PROM0 LS132 LS273 7406 LS08 | | | Z80A PIO | | Z80A | | | |--------------| |------------| LS04 LS74A LS86 LS161 LS166 74393 | | | | ROM3 LS107 4116 4116 LS10 LS257 LS74A LS08 LS107 PROM2 | | | | ROM2 LS257 4116 4116 LS139 74393 LS107 LS32 LS175 74393 | | | | ROM1 LS257 4116 4116 LS08 LS283 LS10 LS32 PROM1 74393 | | | | ROM0 LS257 4116 4116 LS257 74393 LS375 74S263 LS145 PROM4 | | | | DIPSW1 DIPSW2 4045 4045 LS257 LS245 LS375 LS273 LS166 PROM3 | |--------------------------------------------------------------------------------------| Notes: All IC's shown. ROM0-3 - Texas Instruments TMS4732 4Kx8 General Purpose Mask Programmable ROM PROM0-2 - Philips Semiconductors N82S129 256x4 TTL Bipolar PROM PROM3-4 - Philips Semiconductors N82S131 512x4 TTL Bipolar PROM 4116 - Texas Instruments TMS4116-25 16Kx1 Dynamic RAM 4045 - Texas Instruments TMS4045-15 1Kx4 General Purpose Static RAM with Multiplexed I/O Z80A - Sharp LH0080A Z80A CPU Z80APIO - SGS-Thomson Z8420AB1 Z80A PIO SN76477 - Texas Instruments SN76477N Complex Sound Generator 74S263 - Texas Instruments SN74S263N Row Output Character Generator MC1488 - Texas Instruments MC1488 Quadruple Line Driver MC1489 - Texas Instruments MC1489 Quadruple Line Receiver CN1 - RS-232 connector CN2 - ABC bus connector (DIN 41612) CN3 - video connector CN4 - cassette motor connector CN5 - cassette connector CN6 - keyboard connector SW1 - reset switch DIPSW1 - DIPSW2 - ROM checksum program: 10 FOR I%=0% TO 16383% 20 A%=A%+PEEK(I%) 30 NEXT I% 40 ;A%; I% */ /* TODO: - PWM sound in ABC-klubben/abc80/grafik/flagga.bac - proper keyboard controller emulation - MyAB TKN80 80-column card - GeJo 80-column card - Mikrodatorn 64K expansion - Metric ABC CAD 1000 - ROMs with checksum 10042 */ #include "emu.h" #include "includes/abc80.h" #include "screen.h" #include "softlist.h" #include "speaker.h" //************************************************************************** // CONSTANTS //************************************************************************** #define LOG 0 //************************************************************************** // MEMORY MANAGEMENT //************************************************************************** //------------------------------------------------- // read - //------------------------------------------------- READ8_MEMBER( abc80_state::read ) { uint8_t data = 0xff; uint8_t mmu = m_mmu_rom->base()[0x40 | (offset >> 10)]; if (!(mmu & MMU_XM)) { data = m_bus->xmemfl_r(space, offset); } else if (!(mmu & MMU_ROM)) { data = m_rom->base()[offset & 0x3fff]; } else if (mmu & MMU_VRAMS) { data = m_video_ram[offset & 0x3ff]; } else if (!(mmu & MMU_RAM)) { data = m_ram->pointer()[offset & 0x3fff]; } return data; } //------------------------------------------------- // write - //------------------------------------------------- WRITE8_MEMBER( abc80_state::write ) { uint8_t mmu = m_mmu_rom->base()[0x40 | (offset >> 10)]; if (!(mmu & MMU_XM)) { m_bus->xmemw_w(space, offset, data); } else if (mmu & MMU_VRAMS) { m_video_ram[offset & 0x3ff] = data; } else if (!(mmu & MMU_RAM)) { m_ram->pointer()[offset & 0x3fff] = data; } } //************************************************************************** // SOUND //************************************************************************** //------------------------------------------------- // csg_w - //------------------------------------------------- WRITE8_MEMBER( abc80_state::csg_w ) { m_csg->enable_w(!BIT(data, 0)); m_csg->vco_voltage_w(BIT(data, 1) ? 2.5 : 0); m_csg->vco_w(BIT(data, 2)); m_csg->mixer_b_w(BIT(data, 3)); m_csg->mixer_a_w(BIT(data, 4)); m_csg->mixer_c_w(BIT(data, 5)); m_csg->envelope_2_w(BIT(data, 6)); m_csg->envelope_1_w(BIT(data, 7)); } //************************************************************************** // ADDRESS MAPS //************************************************************************** //------------------------------------------------- // ADDRESS_MAP( abc80_mem ) //------------------------------------------------- void abc80_state::abc80_mem(address_map &map) { map.unmap_value_high(); map(0x0000, 0xffff).rw(FUNC(abc80_state::read), FUNC(abc80_state::write)); } //------------------------------------------------- // ADDRESS_MAP( abc80_io ) //------------------------------------------------- void abc80_state::abc80_io(address_map &map) { map.unmap_value_high(); map.global_mask(0x17); map(0x00, 0x00).rw(m_bus, FUNC(abcbus_slot_device::inp_r), FUNC(abcbus_slot_device::out_w)); map(0x01, 0x01).rw(m_bus, FUNC(abcbus_slot_device::stat_r), FUNC(abcbus_slot_device::cs_w)); map(0x02, 0x02).w(m_bus, FUNC(abcbus_slot_device::c1_w)); map(0x03, 0x03).w(m_bus, FUNC(abcbus_slot_device::c2_w)); map(0x04, 0x04).w(m_bus, FUNC(abcbus_slot_device::c3_w)); map(0x05, 0x05).w(m_bus, FUNC(abcbus_slot_device::c4_w)); map(0x06, 0x06).w(FUNC(abc80_state::csg_w)); map(0x07, 0x07).r(m_bus, FUNC(abcbus_slot_device::rst_r)); map(0x10, 0x13).mirror(0x04).rw(m_pio, FUNC(z80pio_device::read_alt), FUNC(z80pio_device::write_alt)); } //************************************************************************** // DEVICE CONFIGURATION //************************************************************************** //------------------------------------------------- // Z80PIO //------------------------------------------------- READ8_MEMBER( abc80_state::pio_pa_r ) { /* PIO Port A bit description 0 keyboard data 1 keyboard data 2 keyboard data 3 keyboard data 4 keyboard data 5 keyboard data 6 keyboard data 7 keyboard strobe */ uint8_t data = 0; //data |= m_kb->data_r(); data |= m_key_data; data |= (m_key_strobe << 7); return data; } READ8_MEMBER( abc80_state::pio_pb_r ) { /* PIO Channel B 0 R RS-232C RxD 1 R RS-232C _CTS 2 R RS-232C _DCD 3 W RS-232C TxD 4 W RS-232C _RTS 5 W Cassette Motor 6 W Cassette Data 7 R Cassette Data */ uint8_t data = 0; // receive data data |= m_rs232->rxd_r(); // clear to send data |= m_rs232->cts_r() << 1; // data carrier detect data |= m_rs232->dcd_r() << 2; // cassette data data |= m_tape_in_latch << 7; if (LOG) logerror("%s %s read tape latch %u\n", machine().time().as_string(), machine().describe_context(), m_tape_in_latch); return data; } WRITE8_MEMBER( abc80_state::pio_pb_w ) { /* PIO Channel B 0 R RS-232C RxD 1 R RS-232C _CTS 2 R RS-232C _DCD 3 W RS-232C TxD 4 W RS-232C _RTS 5 W Cassette Motor 6 W Cassette Data 7 R Cassette Data */ // transmit data m_rs232->write_txd(BIT(data, 3)); // request to send m_rs232->write_rts(BIT(data, 4)); // cassette motor if (BIT(data, 5)) { if (!m_motor) if (LOG) logerror("%s %s started cassette motor\n", machine().time().as_string(), machine().describe_context()); m_cassette->change_state(CASSETTE_MOTOR_ENABLED, CASSETTE_MASK_MOTOR); m_motor = true; } else { if (m_motor) if (LOG) logerror("%s %s stopped cassette motor\n", machine().time().as_string(), machine().describe_context()); m_cassette->change_state(CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR); m_motor = false; } // cassette data m_cassette->output(BIT(data, 6) ? -1.0 : +1.0); // cassette input latch if (BIT(data, 6)) { if (LOG) logerror("%s %s clear tape in latch\n", machine().time().as_string(), machine().describe_context()); m_tape_in_latch = 1; m_pio->pb7_w(m_tape_in_latch); } } //------------------------------------------------- // Z80 Daisy Chain //------------------------------------------------- static const z80_daisy_config abc80_daisy_chain[] = { { Z80PIO_TAG }, { nullptr } }; //------------------------------------------------- // ABC80_KEYBOARD_INTERFACE //------------------------------------------------- WRITE_LINE_MEMBER( abc80_state::keydown_w ) { m_key_strobe = state; m_pio->port_a_write(m_key_strobe << 7); } void abc80_state::kbd_w(u8 data) { m_key_data = data; m_key_strobe = 1; uint8_t pio_data = 0x80 | data; m_pio->port_a_write(pio_data); timer_set(attotime::from_msec(50), TIMER_ID_FAKE_KEYBOARD_CLEAR); } //************************************************************************** // MACHINE INITIALIZATION //************************************************************************** //------------------------------------------------- // device_timer - handler timer events //------------------------------------------------- void abc80_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_ID_SCANLINE: draw_scanline(m_bitmap, m_screen->vpos()); m_pio_astb = !m_pio_astb; m_pio->strobe_a(m_pio_astb); break; case TIMER_ID_CASSETTE: { if (!m_motor) return; int tape_in = m_cassette->input() > 0; if (m_tape_in != tape_in) if (LOG) logerror("%s tape flank %u\n", machine().time().as_string(), tape_in); if (m_tape_in_latch && (m_tape_in != tape_in)) { if (LOG) logerror("%s set tape in latch\n", machine().time().as_string()); m_tape_in_latch = 0; m_pio->port_b_write(m_tape_in_latch << 7); } m_tape_in = tape_in; } break; case TIMER_ID_BLINK: m_blink = !m_blink; break; case TIMER_ID_VSYNC_ON: if (LOG) logerror("%s vsync 1\n", machine().time().as_string()); m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); break; case TIMER_ID_VSYNC_OFF: if (LOG) logerror("%s vsync 0\n", machine().time().as_string()); m_maincpu->set_input_line(INPUT_LINE_NMI, CLEAR_LINE); break; case TIMER_ID_FAKE_KEYBOARD_CLEAR: m_pio->port_a_write(m_key_data); m_key_strobe = 0; m_key_data = 0; break; } } //------------------------------------------------- // MACHINE_START( abc80 ) //------------------------------------------------- void abc80_state::machine_start() { // start timers m_cassette_timer = timer_alloc(TIMER_ID_CASSETTE); m_cassette_timer->adjust(attotime::from_hz(44100), 0, attotime::from_hz(44100)); // register for state saving save_item(NAME(m_key_data)); save_item(NAME(m_key_strobe)); save_item(NAME(m_pio_astb)); save_item(NAME(m_latch)); save_item(NAME(m_blink)); save_item(NAME(m_motor)); save_item(NAME(m_tape_in)); save_item(NAME(m_tape_in_latch)); } QUICKLOAD_LOAD_MEMBER(abc80_state::quickload_cb) { address_space &space = m_maincpu->space(AS_PROGRAM); offs_t address = space.read_byte(BOFA + 1) << 8 | space.read_byte(BOFA); if (LOG) logerror("BOFA %04x\n",address); std::vector data; data.resize(quickload_size); image.fread(&data[0], quickload_size); for (int i = 1; i < quickload_size; i++) space.write_byte(address++, data[i]); offs_t eofa = address; space.write_byte(EOFA, eofa & 0xff); space.write_byte(EOFA + 1, eofa >> 8); if (LOG) logerror("EOFA %04x\n",address); offs_t head = address + 1; space.write_byte(HEAD, head & 0xff); space.write_byte(HEAD + 1, head >> 8); if (LOG) logerror("HEAD %04x\n",address); return image_init_result::PASS; } //************************************************************************** // MACHINE DRIVERS //************************************************************************** //------------------------------------------------- // machine_config( abc80 ) //------------------------------------------------- void abc80_state::abc80(machine_config &config) { // basic machine hardware Z80(config, m_maincpu, XTAL(11'980'800)/2/2); // 2.9952 MHz m_maincpu->set_addrmap(AS_PROGRAM, &abc80_state::abc80_mem); m_maincpu->set_addrmap(AS_IO, &abc80_state::abc80_io); m_maincpu->set_daisy_config(abc80_daisy_chain); // video hardware abc80_video(config); // sound hardware SPEAKER(config, "mono").front_center(); SN76477(config, m_csg); m_csg->set_noise_params(RES_K(47), RES_K(330), CAP_P(390)); m_csg->set_decay_res(RES_K(47)); m_csg->set_attack_params(CAP_U(10), RES_K(2.2)); m_csg->set_amp_res(RES_K(33)); m_csg->set_feedback_res(RES_K(10)); m_csg->set_vco_params(0, CAP_N(10), RES_K(100)); m_csg->set_pitch_voltage(0); m_csg->set_slf_params(CAP_U(1), RES_K(220)); m_csg->set_oneshot_params(CAP_U(0.1), RES_K(330)); m_csg->add_route(ALL_OUTPUTS, "mono", 0.25); // devices Z80PIO(config, m_pio, XTAL(11'980'800)/2/2); m_pio->out_int_callback().set_inputline(m_maincpu, INPUT_LINE_IRQ0); m_pio->in_pa_callback().set(FUNC(abc80_state::pio_pa_r)); m_pio->in_pb_callback().set(FUNC(abc80_state::pio_pb_r)); m_pio->out_pb_callback().set(FUNC(abc80_state::pio_pb_w)); CASSETTE(config, m_cassette); m_cassette->set_default_state(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_ENABLED); m_cassette->add_route(ALL_OUTPUTS, "mono", 0.05); m_cassette->set_interface("abc80_cass"); ABC80_KEYBOARD(config, m_kb, 0); m_kb->keydown_wr_callback().set(FUNC(abc80_state::keydown_w)); ABCBUS_SLOT(config, m_bus, XTAL(11'980'800)/2/2, abc80_cards, "abcexp"); RS232_PORT(config, RS232_TAG, default_rs232_devices, nullptr); generic_keyboard_device &keyboard(GENERIC_KEYBOARD(config, KEYBOARD_TAG, 0)); keyboard.set_keyboard_callback(FUNC(abc80_state::kbd_w)); QUICKLOAD(config, "quickload", "bac", attotime::from_seconds(2)).set_load_callback(FUNC(abc80_state::quickload_cb)); // internal ram RAM(config, RAM_TAG).set_default_size("16K"); // software list SOFTWARE_LIST(config, "cass_list").set_original("abc80_cass"); SOFTWARE_LIST(config, "flop_list").set_original("abc80_flop"); } //************************************************************************** // ROMS //************************************************************************** //------------------------------------------------- // ROM( abc80 ) //------------------------------------------------- ROM_START( abc80 ) ROM_REGION( 0x4000, Z80_TAG, 0 ) ROM_DEFAULT_BIOS("9913") ROM_SYSTEM_BIOS( 0, "11273", "Checksum 11273" ) ROMX_LOAD( "3506_3.a5", 0x0000, 0x1000, CRC(7c004fb6) SHA1(9aee1d085122f4537c3e6ecdab9d799bd429ef52), ROM_BIOS(0) ) ROMX_LOAD( "3507_3.a3", 0x1000, 0x1000, CRC(d1850a84) SHA1(f7719f3af9173601a2aa23ae38ae00de1a387ad8), ROM_BIOS(0) ) ROMX_LOAD( "3508_3.a4", 0x2000, 0x1000, CRC(b55528e9) SHA1(3e5017e8cacad1f13215242f1bbd89d1d3eee131), ROM_BIOS(0) ) ROMX_LOAD( "3509_3.a2", 0x3000, 0x1000, CRC(659cab1e) SHA1(181db748cef22cdcccd311a60aa6189c85343db7), ROM_BIOS(0) ) ROM_SYSTEM_BIOS( 1, "9913", "Checksum 9913" ) ROMX_LOAD( "3506_3_v2.a5", 0x0000, 0x1000, CRC(e2afbf48) SHA1(9883396edd334835a844dcaa792d29599a8c67b9), ROM_BIOS(1) ) ROMX_LOAD( "3507_3_v2.a3", 0x1000, 0x1000, CRC(d224412a) SHA1(30968054bba7c2aecb4d54864b75a446c1b8fdb1), ROM_BIOS(1) ) ROMX_LOAD( "3508_3_v2.a4", 0x2000, 0x1000, CRC(1502ba5b) SHA1(5df45909c2c4296e5701c6c99dfaa9b10b3a729b), ROM_BIOS(1) ) ROMX_LOAD( "3509_3_v2.a2", 0x3000, 0x1000, CRC(bc8860b7) SHA1(28b6cf7f5a4f81e017c2af091c3719657f981710), ROM_BIOS(1) ) ROM_REGION( 0xa00, "chargen", 0 ) ROM_LOAD( "sn74s263.h2", 0x0000, 0x0a00, BAD_DUMP CRC(9e064e91) SHA1(354783c8f2865f73dc55918c9810c66f3aca751f) ) // created by hand ROM_REGION( 0x100, "hsync", 0 ) ROM_LOAD( "abc80_11.k5", 0x0000, 0x0100, CRC(e4f7e018) SHA1(63e718a39537f37286ea183e6469808c271dbfa5) ) // "64 40029-01" 82S129 256x4 horizontal sync ROM_REGION( 0x200, "vsync", 0 ) ROM_LOAD( "abc80_21.k2", 0x0000, 0x0200, CRC(445a45b9) SHA1(bcc1c4fafe68b3500b03de785ca32abd63cea252) ) // "64 40030-01" 82S131 512x4 vertical sync ROM_REGION( 0x100, "attr", 0 ) ROM_LOAD( "abc80_12.j3", 0x0000, 0x0100, CRC(6c46811c) SHA1(2d3bdf2d3a2a88ddb1c0c637967e1b2b9541a928) ) // "64 40056-01" 82S129 256x4 attribute ROM_REGION( 0x200, "line", 0 ) ROM_LOAD( "abc80_22.k1", 0x0000, 0x0200, CRC(74de7a0b) SHA1(96f37b0ca65aa8af4242bad38124f410b7f657fe) ) // "64 40058-01" 82S131 512x4 chargen 74S263 row address ROM_REGION( 0x100, "mmu", 0 ) ROM_LOAD( "abc80_13.e7", 0x0000, 0x0100, CRC(f7738834) SHA1(b02df3e678fb50c9cb75b4a97615222d3b4577a3) ) // "64 40057-01" 82S129 256x4 address decoder ROM_END //************************************************************************** // SYSTEM DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1978, abc80, 0, 0, abc80, 0, abc80_state, empty_init, "Luxor Datorer AB", "ABC 80", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND )