// license:BSD-3-Clause // copyright-holders:Robbbert /*************************************************************************** ET-3400 2009-05-12 Skeleton driver. 2016-04-29 Added Accessory. ETA-3400 Memory I/O Accessory - Provides Tiny Basic, a Terminal, a Serial Interface, a Cassette interface, and 1k to 4k of expansion RAM. All parts are working. - The roms are U105 (Monitor), U106 (Tiny Basic), both type NMOS2316E, and U108 (address decoder PROM). - Navigating: LED to Monitor: D1400 Monitor to Basic: G 1C00 Monitor to LED: G FC00 Basic to Monitor: BYE - All commands in Basic and Monitor are UPPERCASE only. - Terminal is defaulted to 9600 baud, 7 bits, 2 stop bits. ****************************************************************************/ #include "emu.h" #include "cpu/m6800/m6800.h" #include "machine/6821pia.h" #include "bus/rs232/rs232.h" #include "imagedev/cassette.h" #include "sound/wave.h" #include "et3400.lh" class et3400_state : public driver_device { public: et3400_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_pia(*this, "pia") , m_rs232(*this, "rs232") , m_cass(*this, "cassette") { } DECLARE_READ8_MEMBER(keypad_r); DECLARE_WRITE8_MEMBER(display_w); DECLARE_READ8_MEMBER(pia_ar); DECLARE_WRITE8_MEMBER(pia_aw); DECLARE_READ8_MEMBER(pia_br); DECLARE_WRITE8_MEMBER(pia_bw); private: required_device m_maincpu; required_device m_pia; required_device m_rs232; required_device m_cass; }; READ8_MEMBER( et3400_state::keypad_r ) { UINT8 data = 0xff; if (~offset & 4) data &= ioport("X2")->read(); if (~offset & 2) data &= ioport("X1")->read(); if (~offset & 1) data &= ioport("X0")->read(); return data; } WRITE8_MEMBER( et3400_state::display_w ) { /* This computer sets each segment, one at a time. */ static const UINT8 segments[8]={0x40,0x20,0x10,0x08,0x04,0x02,0x01,0x80}; UINT8 digit = (offset >> 4) & 7; UINT8 segment = segments[offset & 7]; UINT8 segdata = output().get_digit_value(digit); if (data & 1) segdata |= segment; else segdata &= ~segment; output().set_digit_value(digit, segdata); } // d1,2,3 = Baud rate // d4 = gnd // d7 = rs232 in READ8_MEMBER( et3400_state::pia_ar ) { return ioport("BAUD")->read() | (m_rs232->rxd_r() << 7); } // d0 = rs232 out WRITE8_MEMBER( et3400_state::pia_aw ) { m_rs232->write_txd(BIT(data, 0)); } // d7 = cass in READ8_MEMBER( et3400_state::pia_br ) { return (m_cass->input() > +0.0) << 7; } // d0 = cass out WRITE8_MEMBER( et3400_state::pia_bw ) { m_cass->output(BIT(data, 0) ? -1.0 : +1.0); } static ADDRESS_MAP_START(et3400_mem, AS_PROGRAM, 8, et3400_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE( 0x0000, 0x0fff ) AM_RAM AM_RANGE( 0x1000, 0x1003 ) AM_MIRROR(0x03fc) AM_DEVREADWRITE("pia", pia6821_device, read, write) AM_RANGE( 0x1400, 0x23ff ) AM_ROM AM_REGION("roms", 0) AM_RANGE( 0xc000, 0xc0ff ) AM_READ(keypad_r) AM_RANGE( 0xc100, 0xc1ff ) AM_WRITE(display_w) AM_RANGE( 0xfc00, 0xffff ) AM_ROM AM_REGION("roms", 0x1000) ADDRESS_MAP_END /* Input ports */ static INPUT_PORTS_START( et3400 ) PORT_START("X0") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("D DO") PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("A AUTO") PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("7 RTI") PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("4 INDEX") PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("1 ACCA") PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("0") PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT( 0xc0, 0xc0, IPT_UNUSED ) PORT_START("X1") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("E EXAM") PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("B BACK") PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("8 SS") PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("5 CC") PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("2 ACCB") PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_BIT( 0x20, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME(".") PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_BIT( 0xc0, 0xc0, IPT_UNUSED ) PORT_START("X2") PORT_BIT( 0x01, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("F FWD") PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_BIT( 0x02, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("C CHAN") PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_BIT( 0x04, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("9 BR") PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT( 0x08, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("6 SP") PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_BIT( 0x10, IP_ACTIVE_LOW, IPT_KEYBOARD ) PORT_NAME("3 PC") PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_BIT( 0xe0, 0xe0, IPT_UNUSED ) PORT_START("BAUD") PORT_DIPNAME( 0x0E, 0x02, "Baud Rate" ) PORT_DIPSETTING( 0x0E, "110" ) PORT_DIPSETTING( 0x00, "300" ) PORT_DIPSETTING( 0x0A, "600" ) PORT_DIPSETTING( 0x08, "1200" ) PORT_DIPSETTING( 0x06, "2400" ) PORT_DIPSETTING( 0x04, "4800" ) PORT_DIPSETTING( 0x02, "9600" ) INPUT_PORTS_END static DEVICE_INPUT_DEFAULTS_START( terminal ) DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 ) DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 ) DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 ) DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_7 ) DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE ) DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_2 ) DEVICE_INPUT_DEFAULTS_END static MACHINE_CONFIG_START( et3400, et3400_state ) /* basic machine hardware */ MCFG_CPU_ADD("maincpu", M6800, XTAL_4MHz / 4 ) // 1MHz with memory i/o accessory, or 500khz without it MCFG_CPU_PROGRAM_MAP(et3400_mem) /* video hardware */ MCFG_DEFAULT_LAYOUT(layout_et3400) // Devices MCFG_DEVICE_ADD("pia", PIA6821, 0) MCFG_PIA_WRITEPA_HANDLER(WRITE8(et3400_state, pia_aw)) MCFG_PIA_WRITEPB_HANDLER(WRITE8(et3400_state, pia_bw)) MCFG_PIA_READPA_HANDLER(READ8(et3400_state, pia_ar)) MCFG_PIA_READPB_HANDLER(READ8(et3400_state, pia_br)) MCFG_RS232_PORT_ADD("rs232", default_rs232_devices, "terminal") MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("terminal", terminal) MCFG_CASSETTE_ADD("cassette") MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED) MCFG_SPEAKER_STANDARD_MONO("mono") MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette") MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.05) MACHINE_CONFIG_END /* ROM definition */ ROM_START( et3400 ) ROM_REGION( 0x1420, "roms", 0 ) ROM_LOAD( "monitor.u105", 0x0000, 0x0800, CRC(e4142682) SHA1(785966018dd6eb097ed9bd5c7def2354ab4347db) ) ROM_LOAD( "basic.u106", 0x0800, 0x0800, CRC(bbd6a801) SHA1(088da24bd4d923d4f196b993154c538835d10605) ) ROM_LOAD( "et3400.ic12", 0x1000, 0x0400, CRC(2eff1f58) SHA1(38b655de7393d7a92b08276f7c14a99eaa2a4a9f) ) ROM_LOAD_OPTIONAL("prom.u108", 0x1400, 0x0020, CRC(273025c3) SHA1(136c1cdce2a4a796c1c46e8ea4f798cdee4b549b) ) // not used ROM_END /* Driver */ /* YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS */ COMP( 1976, et3400, 0, 0, et3400, et3400, driver_device, 0, "Heath Inc", "Heathkit ET-3400", 0 )