// 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 - */ /* TODO: - cassette interrupt routine samples the latch too soon - proper keyboard controller emulation - MyAB 80-column card - GeJo 80-column card - Mikrodatorn 64K expansion - floppy - printer - IEC - Metric ABC CAD 1000 */ #include "includes/abc80.h" #define KEYBOARD_TAG "keyboard" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define MMU_XM 0x01 #define MMU_ROM 0x02 #define MMU_VRAMS 0x04 #define MMU_RAM 0x08 //************************************************************************** // MEMORY MANAGEMENT //************************************************************************** //------------------------------------------------- // read - //------------------------------------------------- READ8_MEMBER( abc80_state::read ) { UINT8 data = 0xff; UINT8 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 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 //************************************************************************** //------------------------------------------------- // vco_voltage_w - CSG VCO voltage select //------------------------------------------------- WRITE_LINE_MEMBER( abc80_state::vco_voltage_w ) { m_psg->vco_voltage_w(state ? 2.5 : 0); } //************************************************************************** // ADDRESS MAPS //************************************************************************** //------------------------------------------------- // ADDRESS_MAP( abc80_mem ) //------------------------------------------------- static ADDRESS_MAP_START( abc80_mem, AS_PROGRAM, 8, abc80_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xffff) AM_READWRITE(read, write) ADDRESS_MAP_END //------------------------------------------------- // ADDRESS_MAP( abc80_io ) //------------------------------------------------- static ADDRESS_MAP_START( abc80_io, AS_IO, 8, abc80_state ) ADDRESS_MAP_UNMAP_HIGH ADDRESS_MAP_GLOBAL_MASK(0x17) AM_RANGE(0x00, 0x00) AM_DEVREADWRITE(ABCBUS_TAG, abcbus_slot_device, inp_r, out_w) AM_RANGE(0x01, 0x01) AM_DEVREADWRITE(ABCBUS_TAG, abcbus_slot_device, stat_r, cs_w) AM_RANGE(0x02, 0x02) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c1_w) AM_RANGE(0x03, 0x03) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c2_w) AM_RANGE(0x04, 0x04) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c3_w) AM_RANGE(0x05, 0x05) AM_DEVWRITE(ABCBUS_TAG, abcbus_slot_device, c4_w) AM_RANGE(0x06, 0x06) AM_WRITE_PORT("SN76477") AM_RANGE(0x07, 0x07) AM_DEVREAD(ABCBUS_TAG, abcbus_slot_device, rst_r) AM_RANGE(0x10, 0x13) AM_MIRROR(0x04) AM_DEVREADWRITE(Z80PIO_TAG, z80pio_device, read_alt, write_alt) ADDRESS_MAP_END //************************************************************************** // INPUT PORTS //************************************************************************** //------------------------------------------------- // INPUT_PORTS( abc80 ) //------------------------------------------------- static INPUT_PORTS_START( abc80 ) PORT_START("SW1") PORT_DIPUNKNOWN_DIPLOC( 0x01, IP_ACTIVE_LOW, "SW1:1" ) PORT_DIPUNKNOWN_DIPLOC( 0x02, IP_ACTIVE_LOW, "SW1:2" ) PORT_DIPUNKNOWN_DIPLOC( 0x04, IP_ACTIVE_LOW, "SW1:3" ) PORT_DIPUNKNOWN_DIPLOC( 0x08, IP_ACTIVE_LOW, "SW1:4" ) PORT_DIPUNKNOWN_DIPLOC( 0x10, IP_ACTIVE_LOW, "SW1:5" ) PORT_DIPUNKNOWN_DIPLOC( 0x20, IP_ACTIVE_LOW, "SW1:6" ) PORT_DIPUNKNOWN_DIPLOC( 0x40, IP_ACTIVE_LOW, "SW1:7" ) PORT_DIPUNKNOWN_DIPLOC( 0x80, IP_ACTIVE_LOW, "SW1:8" ) PORT_START("SW2") PORT_DIPUNKNOWN_DIPLOC( 0x01, IP_ACTIVE_LOW, "SW2:1" ) PORT_DIPUNKNOWN_DIPLOC( 0x02, IP_ACTIVE_LOW, "SW2:2" ) PORT_DIPUNKNOWN_DIPLOC( 0x04, IP_ACTIVE_LOW, "SW2:3" ) PORT_DIPUNKNOWN_DIPLOC( 0x08, IP_ACTIVE_LOW, "SW2:4" ) PORT_DIPUNKNOWN_DIPLOC( 0x10, IP_ACTIVE_LOW, "SW2:5" ) PORT_DIPUNKNOWN_DIPLOC( 0x20, IP_ACTIVE_LOW, "SW2:6" ) PORT_DIPUNKNOWN_DIPLOC( 0x40, IP_ACTIVE_LOW, "SW2:7" ) PORT_DIPUNKNOWN_DIPLOC( 0x80, IP_ACTIVE_LOW, "SW2:8" ) PORT_START("SN76477") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, enable_w) PORT_BIT(0x02, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, abc80_state, vco_voltage_w) PORT_BIT(0x04, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, vco_w) PORT_BIT(0x08, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, mixer_b_w) PORT_BIT(0x10, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, mixer_a_w) PORT_BIT(0x20, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, mixer_c_w) PORT_BIT(0x40, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, envelope_2_w) PORT_BIT(0x80, IP_ACTIVE_HIGH, IPT_SPECIAL) PORT_WRITE_LINE_DEVICE_MEMBER(SN76477_TAG, sn76477_device, envelope_1_w) INPUT_PORTS_END //************************************************************************** // DEVICE CONFIGURATION //************************************************************************** //------------------------------------------------- // sn76477_interface csg_intf //------------------------------------------------- static const sn76477_interface csg_intf = { RES_K(47), // 4 noise_res R26 47k RES_K(330), // 5 filter_res R24 330k CAP_P(390), // 6 filter_cap C52 390p RES_K(47), // 7 decay_res R23 47k CAP_U(10), // 8 attack_decay_cap C50 10u/35V RES_K(2.2), // 10 attack_res R21 2.2k RES_K(33), // 11 amplitude_res R19 33k RES_K(10), // 12 feedback_res R18 10k 0, // 16 vco_voltage 0V or 2.5V CAP_N(10) , // 17 vco_cap C48 10n RES_K(100), // 18 vco_res R20 100k 0, // 19 pitch_voltage N/C RES_K(220), // 20 slf_res R22 220k CAP_U(1), // 21 slf_cap C51 1u/35V CAP_U(0.1), // 23 oneshot_cap C53 0.1u RES_K(330) // 24 oneshot_res R25 330k }; //------------------------------------------------- // Z80PIO_INTERFACE( pio_intf ) //------------------------------------------------- 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 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 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; //logerror("read tape latch %u\n", 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)) { m_cassette->change_state(CASSETTE_MOTOR_ENABLED, CASSETTE_MASK_MOTOR); m_cassette_timer->enable(true); } else { m_cassette->change_state(CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR); m_cassette_timer->enable(false); } // cassette data m_cassette->output(BIT(data, 6) ? -1.0 : +1.0); // cassette input latch if (BIT(data, 6)) { //logerror("clear tape in latch\n"); m_tape_in_latch = 1; m_pio->port_b_write(m_tape_in_latch << 7); } }; static Z80PIO_INTERFACE( pio_intf ) { DEVCB_CPU_INPUT_LINE(Z80_TAG, INPUT_LINE_IRQ0), /* callback when change interrupt status */ DEVCB_DRIVER_MEMBER(abc80_state, pio_pa_r), /* port A read callback */ DEVCB_NULL, /* port A write callback */ DEVCB_NULL, /* portA ready active callback */ DEVCB_DRIVER_MEMBER(abc80_state, pio_pb_r), /* port B read callback */ DEVCB_DRIVER_MEMBER(abc80_state, pio_pb_w), /* port B write callback */ DEVCB_NULL /* portB ready active callback */ }; //------------------------------------------------- // Z80PIO_INTERFACE( pio_intf ) //------------------------------------------------- static const z80_daisy_config abc80_daisy_chain[] = { { Z80PIO_TAG }, { NULL } }; //------------------------------------------------- // cassette_interface abc80_cassette_interface //------------------------------------------------- static const cassette_interface abc80_cassette_interface = { cassette_default_formats, NULL, (cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_DISABLED | CASSETTE_SPEAKER_MUTED), NULL, NULL }; //------------------------------------------------- // ABC80_KEYBOARD_INTERFACE( kb_intf ) //------------------------------------------------- WRITE_LINE_MEMBER( abc80_state::keydown_w ) { m_key_strobe = state; m_pio->port_a_write(m_key_strobe << 7); } WRITE8_MEMBER( abc80_state::kbd_w ) { m_key_data = data; m_key_strobe = 1; UINT8 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_PIO: m_pio_astb = !m_pio_astb; m_pio->strobe_a(m_pio_astb); break; case TIMER_ID_CASSETTE: { int tape_in = m_cassette->input() > 0; //logerror("tape bit %u\n", tape_in); if (m_tape_in_latch && !m_tape_in && tape_in) { //logerror("-------- set tape in latch\n"); 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: m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); break; case TIMER_ID_VSYNC_OFF: 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)); m_cassette_timer->enable(false); // 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_tape_in)); save_item(NAME(m_tape_in_latch)); } //************************************************************************** // MACHINE DRIVERS //************************************************************************** DEVICE_INPUT_DEFAULTS_START( abc830_slow ) DEVICE_INPUT_DEFAULTS("SW1", 0x0f, 0x03) DEVICE_INPUT_DEFAULTS("S1", 0x01, 0x01) DEVICE_INPUT_DEFAULTS_END //------------------------------------------------- // MACHINE_CONFIG( abc80 ) //------------------------------------------------- static MACHINE_CONFIG_START( abc80, abc80_state ) // basic machine hardware MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_11_9808MHz/2/2) // 2.9952 MHz MCFG_CPU_PROGRAM_MAP(abc80_mem) MCFG_CPU_IO_MAP(abc80_io) MCFG_CPU_CONFIG(abc80_daisy_chain) // video hardware MCFG_FRAGMENT_ADD(abc80_video) // sound hardware MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_ADD(SN76477_TAG, SN76477, 0) MCFG_SOUND_CONFIG(csg_intf) MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.25) // devices MCFG_Z80PIO_ADD(Z80PIO_TAG, XTAL_11_9808MHz/2/2, pio_intf) MCFG_CASSETTE_ADD("cassette", abc80_cassette_interface) MCFG_DEVICE_ADD(ABC80_KEYBOARD_TAG, ABC80_KEYBOARD, 0) MCFG_ABC80_KEYBOARD_KEYDOWN_CALLBACK(WRITELINE(abc80_state, keydown_w)) MCFG_ABCBUS_SLOT_ADD(ABCBUS_TAG, abcbus_cards, "slow") MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("slow", abc830_slow) MCFG_RS232_PORT_ADD(RS232_TAG, default_rs232_devices, NULL) MCFG_DEVICE_ADD(KEYBOARD_TAG, GENERIC_KEYBOARD, 0) MCFG_GENERIC_KEYBOARD_CB(WRITE8(abc80_state, kbd_w)) // internal ram MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("16K") // software list MCFG_SOFTWARE_LIST_ADD("flop_list", "abc80") MACHINE_CONFIG_END //************************************************************************** // ROMS //************************************************************************** //------------------------------------------------- // ROM( abc80 ) //------------------------------------------------- ROM_START( abc80 ) ROM_REGION( 0x4000, Z80_TAG, 0 ) ROM_DEFAULT_BIOS("v2") ROM_SYSTEM_BIOS( 0, "v1", "V1" ) ROMX_LOAD( "3506_3.a5", 0x0000, 0x1000, CRC(7c004fb6) SHA1(9aee1d085122f4537c3e6ecdab9d799bd429ef52), ROM_BIOS(1) ) ROMX_LOAD( "3507_3.a3", 0x1000, 0x1000, CRC(d1850a84) SHA1(f7719f3af9173601a2aa23ae38ae00de1a387ad8), ROM_BIOS(1) ) ROMX_LOAD( "3508_3.a4", 0x2000, 0x1000, CRC(b55528e9) SHA1(3e5017e8cacad1f13215242f1bbd89d1d3eee131), ROM_BIOS(1) ) ROMX_LOAD( "3509_3.a2", 0x3000, 0x1000, CRC(659cab1e) SHA1(181db748cef22cdcccd311a60aa6189c85343db7), ROM_BIOS(1) ) ROM_SYSTEM_BIOS( 1, "v2", "V2" ) ROMX_LOAD( "3506_3_v2.a5", 0x0000, 0x1000, CRC(e2afbf48) SHA1(9883396edd334835a844dcaa792d29599a8c67b9), ROM_BIOS(2) ) ROMX_LOAD( "3507_3_v2.a3", 0x1000, 0x1000, CRC(d224412a) SHA1(30968054bba7c2aecb4d54864b75a446c1b8fdb1), ROM_BIOS(2) ) ROMX_LOAD( "3508_3_v2.a4", 0x2000, 0x1000, CRC(1502ba5b) SHA1(5df45909c2c4296e5701c6c99dfaa9b10b3a729b), ROM_BIOS(2) ) ROMX_LOAD( "3509_3_v2.a2", 0x3000, 0x1000, CRC(bc8860b7) SHA1(28b6cf7f5a4f81e017c2af091c3719657f981710), ROM_BIOS(2) ) 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 INIT COMPANY FULLNAME FLAGS COMP( 1978, abc80, 0, 0, abc80, abc80, driver_device, 0, "Luxor Datorer AB", "ABC 80", GAME_SUPPORTS_SAVE | GAME_IMPERFECT_KEYBOARD )