// license:BSD-3-Clause // copyright-holders:Curt Coder /* NewBrain Grundy Business Systems Ltd. 32K RAM 28K ROM Z80 @ 2MHz COP420 @ 2MHz Z80 @ 4MHz (416): INT/NMI=+5V, WAIT=EXTBUSRQ|BUSAKD, RESET=_FDC RESET, NEC 765AC @ 4 MHz (418) MC6850 ACIA (459) Z80CTC (458) ADC0809 (427) DAC0808 (461) Models according to the Software Technical Manual: Model M: 'Page Register', Expansion Port onto Z80 bus, Video, ACIA/CTC, User Port Model A: Expansion Port, Video, no User Port but has software driver serial port - s/w Printer, s/w V24 Model V: ACIA/CTC, User Port */ /* TODO: - keyboard - only key 7 is recognized - escape key mapping - VFD - reset/powerup time constants - bitmapped video - accurate video timing - cassette - EIM - floppy - CP/M 2.2 ROMs - localized ROM sets - Micropage ROM/RAM card - Z80 PIO board - peripheral (PI) box - sound card */ #include "includes/newbrain.h" //************************************************************************** // MACROS / CONSTANTS //************************************************************************** #define LOG 0 #define LOG_COP 0 #define LOG_VFD 0 //************************************************************************** // IMPLEMENTATION //************************************************************************** //------------------------------------------------- // check_interrupt - //------------------------------------------------- void newbrain_state::check_interrupt() { int level = (!m_clkint || !m_copint) ? ASSERT_LINE : CLEAR_LINE; m_maincpu->set_input_line(INPUT_LINE_IRQ0, level); } //------------------------------------------------- // mreq_r - memory request read //------------------------------------------------- READ8_MEMBER( newbrain_state::mreq_r ) { bool romov = 1, raminh = 0; int exrm = 0; UINT8 data = m_exp->mreq_r(space, offset, 0xff, romov, exrm, raminh); int rom0 = 1, rom1 = 1, rom2 = 1; int a15_14_13 = romov ? (offset >> 13) : exrm; if (!m_pwrup) a15_14_13 = 7; int a15g = BIT(a15_14_13, 2); switch (a15_14_13) { case 5: rom0 = 0; break; case 6: rom1 = 0; break; case 7: rom2 = 0; break; } if (!a15g && !raminh) { data = m_ram->pointer()[offset]; } if (!rom0) { data = m_rom->base()[0x0000 + (offset & 0x1fff)]; } if (!rom1) { data = m_rom->base()[0x2000 + (offset & 0x1fff)]; } if (!rom2) { data = m_rom->base()[0x4000 + (offset & 0x1fff)]; } return data; } //------------------------------------------------- // mreq_w - memory request write //------------------------------------------------- WRITE8_MEMBER( newbrain_state::mreq_w ) { bool romov = 1, raminh = 0; int exrm = 0; m_exp->mreq_w(space, offset, data, romov, exrm, raminh); int a15_14_13 = romov ? (offset >> 13) : exrm; if (!m_pwrup) a15_14_13 = 7; int a15g = BIT(a15_14_13, 2); if (!a15g && !raminh) { m_ram->pointer()[offset] = data; } } //------------------------------------------------- // iorq_r - I/O request read //------------------------------------------------- READ8_MEMBER( newbrain_state::iorq_r ) { bool prtov = 0; UINT8 data = m_exp->iorq_r(space, offset, 0xff, prtov); if (!prtov) { switch ((offset >> 2) & 0x07) { case 1: // EXP1 switch (offset & 0x03) { case 0: // CLCLK clclk(); break; case 2: // COP data = m_cop->microbus_rd(space, 0); break; } break; case 5: // UST if (BIT(offset, 1)) { data = ust_b_r(space, offset, data); } else { data = ust_a_r(space, offset, data); } break; } } return data; } //------------------------------------------------- // iorq_w - I/O request write //------------------------------------------------- WRITE8_MEMBER( newbrain_state::iorq_w ) { bool prtov = 0; m_exp->iorq_w(space, offset, 0xff, prtov); if (!prtov) { switch ((offset >> 2) & 0x07) { case 1: // EXP1 switch (offset & 0x03) { case 0: // CLCLK clclk(); break; case 2: // COP m_cop->microbus_wr(space, offset, data); break; case 3: // ENRG1 enrg1_w(space, offset, data); break; } break; case 2: // TVL tvl(data, BIT(offset, 6)); break; case 3: // TVTL tvtl_w(space, offset, data); break; } } } //------------------------------------------------- // clclk - clear clock interrupt //------------------------------------------------- void newbrain_state::clclk() { if (LOG) logerror("%s %s CLCLK\n", machine().time().as_string(), machine().describe_context()); m_clkint = 1; check_interrupt(); } //------------------------------------------------- // enrg1_w - //------------------------------------------------- WRITE8_MEMBER( newbrain_state::enrg1_w ) { /* bit signal 0 _CLK 1 2 TVP 3 4 _RTSD 5 DO 6 7 PO */ if (LOG) logerror("%s %s ENRG1 %02x\n", machine().time().as_string(), machine().describe_context(), data); // clock enable m_clk = BIT(data, 0); // TV enable m_tvp = BIT(data, 2); // V24 m_rs232_v24->write_rts(BIT(data, 4)); m_rs232_v24->write_txd(BIT(data, 5)); // printer m_rs232_prn->write_txd(BIT(data, 7)); } //------------------------------------------------- // ust_r - //------------------------------------------------- READ8_MEMBER( newbrain_state::ust_a_r ) { /* bit signal 0 +5V 1 PWRUP 2 3 4 5 _CLKINT 6 7 _COPINT */ UINT8 data = 0x5d; // powered up data |= m_pwrup << 1; // interrupts data |= m_clkint << 5; data |= m_copint << 7; return data; } //------------------------------------------------- // user_r - //------------------------------------------------- READ8_MEMBER( newbrain_state::ust_b_r ) { /* bit signal 0 RDDK 1 _CTSD 2 3 4 5 TPIN 6 7 _CTSP */ UINT8 data = 0x5c; // V24 data |= m_rs232_v24->rxd_r(); data |= m_rs232_v24->cts_r() << 1; // tape data |= tpin() << 5; // printer data |= m_rs232_prn->cts_r() << 7; return data; } //------------------------------------------------- // cop_in_r - //------------------------------------------------- READ8_MEMBER( newbrain_state::cop_in_r ) { /* bit description IN0 K8 (CD4076 Q2) IN1 _RD IN2 _COP IN3 _WR */ UINT8 data = 0xe; // keyboard data |= BIT(m_keydata, 2); if (LOG_COP) logerror("%s %s IN %01x\n", machine().time().as_string(), machine().describe_context(), data); return data; } //------------------------------------------------- // cop_g_r - //------------------------------------------------- READ8_MEMBER( newbrain_state::cop_g_r ) { /* bit description G0 +5V G1 K9 (CD4076 Q1) G2 K7 (CD4076 Q0) G3 K3 (CD4076 Q3) */ UINT8 data = 0x1; // keyboard data |= BIT(m_keydata, 1) << 1; data |= BIT(m_keydata, 0) << 2; data |= BIT(m_keydata, 3) << 3; if (LOG_COP) logerror("%s %s G %01x\n", machine().time().as_string(), machine().describe_context(), data); return data; } //------------------------------------------------- // cop_g_w - //------------------------------------------------- void newbrain_state::tm() { cassette_state tm1 = (!m_cop_g3 && !m_cop_k6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED; cassette_state tm2 = (!m_cop_g1 && !m_cop_k6) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED; m_cassette1->change_state(tm1, CASSETTE_MASK_MOTOR); m_cassette2->change_state(tm2, CASSETTE_MASK_MOTOR); } WRITE8_MEMBER( newbrain_state::cop_g_w ) { /* bit description G0 _COPINT G1 _TM1 G2 G3 _TM2 */ if (LOG_COP) logerror("%s %s COPINT %u TM1 %u TM2 %u\n", machine().time().as_string(), machine().describe_context(), BIT(data, 0), BIT(data, 1), BIT(data, 3)); m_copint = !BIT(data, 0); check_interrupt(); m_cop_g1 = BIT(data, 1); m_cop_g3 = BIT(data, 3); tm(); } //------------------------------------------------- // cop_d_w - //------------------------------------------------- WRITE8_MEMBER( newbrain_state::cop_d_w ) { /* bit description D0 inverted to K4 -> CD4024 pin 2 (reset) D1 TDO D2 inverted to K6 -> CD4024 pin 1 (clock), CD4076 pin 7 (clock), inverted to DS8881 pin 3 (enable) D3 not connected */ int k4 = !BIT(data, 0); int k6 = !BIT(data, 2); if (LOG_COP) logerror("%s %s K4 %u K6 %u\n", machine().time().as_string(), machine().describe_context(), k4, k6); m_cop_tdo = BIT(data, 1); m_cassette1->output(m_cop_tdo ? -1.0 : +1.0); m_cassette2->output(m_cop_tdo ? -1.0 : +1.0); if (k4) { // CD4024 RST m_keylatch = 0; if (LOG_COP) logerror("%s %s keylatch reset\n", machine().time().as_string(), machine().describe_context()); } else if (m_cop_k6 && !k6) { // CD4024 CLK m_keylatch++; m_keylatch &= 0x0f; if (LOG_COP) logerror("%s %s keylatch %u\n", machine().time().as_string(), machine().describe_context(), m_keylatch); } if (!m_cop_k6 && k6) { //CD4076 CLK switch (m_keylatch) { case 0: m_keydata = m_y0->read(); break; case 1: m_keydata = m_y1->read(); break; case 2: m_keydata = m_y2->read(); break; case 3: m_keydata = m_y3->read(); break; case 4: m_keydata = m_y4->read(); break; case 5: m_keydata = m_y5->read(); break; case 6: m_keydata = m_y6->read(); break; case 7: m_keydata = m_y7->read(); break; case 8: m_keydata = m_y8->read(); break; case 9: m_keydata = m_y9->read(); break; case 10: m_keydata = m_y10->read(); break; case 11: m_keydata = m_y11->read(); break; case 12: m_keydata = m_y12->read(); break; case 13: m_keydata = m_y13->read(); break; case 14: m_keydata = m_y14->read(); break; case 15: m_keydata = m_y15->read(); break; } if (LOG_COP) logerror("%s %s keydata %01x\n", machine().time().as_string(), machine().describe_context(), m_keydata); } else if (m_cop_k6 && k6) { m_keydata = 0; } else if (!k6) { m_keydata = 0x0f; if (LOG_COP) logerror("%s %s keydata disabled\n", machine().time().as_string(), machine().describe_context()); output().set_digit_value(m_keylatch, m_segment_data); } else { } m_cop_k6 = k6; tm(); } //------------------------------------------------- // k1_w - //------------------------------------------------- WRITE_LINE_MEMBER( newbrain_state::k1_w ) { if (LOG_VFD) logerror("%s %s SO %u\n", machine().time().as_string(), machine().describe_context(), state); m_cop_so = state; } //------------------------------------------------- // k2_w - //------------------------------------------------- WRITE_LINE_MEMBER( newbrain_state::k2_w ) { if (LOG_VFD) logerror("%s %s SK %u\n", machine().time().as_string(), machine().describe_context(), state); if (state) { m_segment_data >>= 1; m_segment_data = (m_cop_so << 15) | (m_segment_data & 0x7fff); if (LOG_VFD) logerror("%s %s SEGMENT %04x\n", machine().time().as_string(), machine().describe_context(), m_segment_data); } } //------------------------------------------------- // tdi_r - //------------------------------------------------- int newbrain_state::tpin() { return (m_cassette1->input() > +1.0) || (m_cassette2->input() > +1.0); } READ_LINE_MEMBER( newbrain_state::tdi_r ) { return tpin() ^ m_cop_tdo; } //************************************************************************** // ADDRESS MAPS //************************************************************************** //------------------------------------------------- // ADDRESS_MAP( newbrain_mreq ) //------------------------------------------------- static ADDRESS_MAP_START( newbrain_mreq, AS_PROGRAM, 8, newbrain_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xffff) AM_READWRITE(mreq_r, mreq_w) ADDRESS_MAP_END //------------------------------------------------- // ADDRESS_MAP( newbrain_iorq ) //------------------------------------------------- static ADDRESS_MAP_START( newbrain_iorq, AS_IO, 8, newbrain_state ) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0xffff) AM_READWRITE(iorq_r, iorq_w) ADDRESS_MAP_END //************************************************************************** // INPUT PORTS //************************************************************************** //------------------------------------------------- // INPUT_PORTS( newbrain ) //------------------------------------------------- static INPUT_PORTS_START( newbrain ) PORT_START("Y0") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("STOP") PORT_CODE(KEYCODE_END) PORT_CHAR(UCHAR_MAMEKEY(END)) PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_START("Y1") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME(UTF8_DOWN) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME(UTF8_RIGHT) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME(UTF8_LEFT) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME(UTF8_UP) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_START("Y2") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_U) PORT_CHAR('u') PORT_CHAR('U') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_J) PORT_CHAR('j') PORT_CHAR('J') PORT_START("Y3") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_I) PORT_CHAR('i') PORT_CHAR('I') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_N) PORT_CHAR('n') PORT_CHAR('N') PORT_START("Y4") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Y) PORT_CHAR('y') PORT_CHAR('Y') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_M) PORT_CHAR('m') PORT_CHAR('M') PORT_START("Y5") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_O) PORT_CHAR('o') PORT_CHAR('O') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('(') PORT_CHAR('[') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_START("Y6") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_L) PORT_CHAR('l') PORT_CHAR('L') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR(')') PORT_CHAR(']') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR('#') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_START("Y7") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR(':') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("* \xC2\xA3") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR('*') PORT_CHAR(0x00A3) PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('"') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_B) PORT_CHAR('b') PORT_CHAR('B') PORT_START("Y8") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_H) PORT_CHAR('h') PORT_CHAR('H') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("VIDEO TEXT") PORT_CODE(KEYCODE_RALT) PORT_CHAR(UCHAR_MAMEKEY(RALT)) // Vd PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_V) PORT_CHAR('v') PORT_CHAR('V') PORT_START("Y9") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_G) PORT_CHAR('g') PORT_CHAR('G') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_P) PORT_CHAR('p') PORT_CHAR('P') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_T) PORT_CHAR('t') PORT_CHAR('T') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_C) PORT_CHAR('c') PORT_CHAR('C') PORT_START("Y10") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_F) PORT_CHAR('f') PORT_CHAR('F') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('=') PORT_CHAR('@') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_R) PORT_CHAR('r') PORT_CHAR('R') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_X) PORT_CHAR('x') PORT_CHAR('X') PORT_START("Y11") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_D) PORT_CHAR('d') PORT_CHAR('D') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('-') PORT_CHAR('\\') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_E) PORT_CHAR('e') PORT_CHAR('E') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Z) PORT_CHAR('z') PORT_CHAR('Z') PORT_START("Y12") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_S) PORT_CHAR('s') PORT_CHAR('S') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR('+') PORT_CHAR('^') PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_W) PORT_CHAR('w') PORT_CHAR('W') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("INSERT") PORT_CODE(KEYCODE_INSERT) PORT_CHAR(UCHAR_MAMEKEY(INSERT)) PORT_START("Y13") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_A) PORT_CHAR('a') PORT_CHAR('A') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("NEW LINE") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) // NL PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_Q) PORT_CHAR('q') PORT_CHAR('Q') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_K) PORT_CHAR('k') PORT_CHAR('K') PORT_START("Y14") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_UNUSED ) PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("SPACE") PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("HOME") PORT_CODE(KEYCODE_HOME) PORT_CHAR(UCHAR_MAMEKEY(HOME)) // CH PORT_START("Y15") PORT_BIT( 0x01, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("SHIFT") PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) // SH PORT_BIT( 0x02, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("GRAPHICS") PORT_CODE(KEYCODE_LALT) PORT_CHAR(UCHAR_MAMEKEY(LALT)) // GR PORT_BIT( 0x04, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("REPEAT") // RPT PORT_BIT( 0x08, IP_ACTIVE_HIGH, IPT_KEYBOARD ) PORT_NAME("CONTROL") PORT_CODE(KEYCODE_LCONTROL) PORT_CHAR(UCHAR_MAMEKEY(LCONTROL)) // GL INPUT_PORTS_END //************************************************************************** // MACHINE INITIALIZATION //************************************************************************** int newbrain_state::get_reset_t() { return RES_K(220) * CAP_U(10) * 1000; // t = R128 * C125 = 2.2s } int newbrain_state::get_pwrup_t() { return RES_K(560) * CAP_U(10) * 1000; // t = R129 * C127 = 5.6s } INTERRUPT_GEN_MEMBER(newbrain_state::newbrain_interrupt) { if (!m_clk) { m_clkint = 0; check_interrupt(); } } //------------------------------------------------- // machine_start - //------------------------------------------------- void newbrain_state::machine_start() { // set power up timer timer_set(attotime::from_usec(get_pwrup_t()), TIMER_ID_PWRUP); // state saving save_item(NAME(m_clk)); save_item(NAME(m_tvp)); save_item(NAME(m_pwrup)); save_item(NAME(m_clkint)); save_item(NAME(m_copint)); save_item(NAME(m_cop_so)); save_item(NAME(m_cop_tdo)); save_item(NAME(m_cop_g1)); save_item(NAME(m_cop_g3)); save_item(NAME(m_cop_k6)); save_item(NAME(m_keylatch)); save_item(NAME(m_keydata)); save_item(NAME(m_segment_data)); } //------------------------------------------------- // machine_reset - //------------------------------------------------- void newbrain_state::machine_reset() { m_maincpu->set_input_line(INPUT_LINE_RESET, ASSERT_LINE); m_cop->set_input_line(INPUT_LINE_RESET, ASSERT_LINE); timer_set(attotime::from_usec(get_reset_t()), TIMER_ID_RESET); } //------------------------------------------------- // device_timer - handler timer events //------------------------------------------------- void newbrain_state::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) { switch (id) { case TIMER_ID_RESET: if (LOG) logerror("%s %s RESET 1\n", machine().time().as_string(), machine().describe_context()); m_maincpu->set_input_line(INPUT_LINE_RESET, CLEAR_LINE); m_cop->set_input_line(INPUT_LINE_RESET, CLEAR_LINE); break; case TIMER_ID_PWRUP: if (LOG) logerror("%s %s PWRUP 1\n", machine().time().as_string(), machine().describe_context()); m_pwrup = 1; break; } } //************************************************************************** // MACHINE DRIVERS //************************************************************************** //------------------------------------------------- // MACHINE_CONFIG( newbrain ) //------------------------------------------------- static MACHINE_CONFIG_START( newbrain, newbrain_state ) // basic system hardware MCFG_CPU_ADD(Z80_TAG, Z80, XTAL_16MHz/8) MCFG_CPU_PROGRAM_MAP(newbrain_mreq) MCFG_CPU_IO_MAP(newbrain_iorq) MCFG_CPU_VBLANK_INT_DRIVER(SCREEN_TAG, newbrain_state, newbrain_interrupt) // TODO remove me MCFG_CPU_ADD(COP420_TAG, COP420, XTAL_16MHz/8) // COP420-GUW/N MCFG_COP400_CONFIG(COP400_CKI_DIVISOR_16, COP400_CKO_OSCILLATOR_OUTPUT, true) MCFG_COP400_READ_G_CB(READ8(newbrain_state, cop_g_r)) MCFG_COP400_WRITE_G_CB(WRITE8(newbrain_state, cop_g_w)) MCFG_COP400_WRITE_D_CB(WRITE8(newbrain_state, cop_d_w)) MCFG_COP400_READ_IN_CB(READ8(newbrain_state, cop_in_r)) MCFG_COP400_WRITE_SO_CB(WRITELINE(newbrain_state, k1_w)) MCFG_COP400_WRITE_SK_CB(WRITELINE(newbrain_state, k2_w)) MCFG_COP400_READ_SI_CB(READLINE(newbrain_state, tdi_r)) // video hardware MCFG_FRAGMENT_ADD(newbrain_video) // devices MCFG_NEWBRAIN_EXPANSION_SLOT_ADD(NEWBRAIN_EXPANSION_SLOT_TAG, XTAL_16MHz/8, newbrain_expansion_cards, "eim") MCFG_CASSETTE_ADD(CASSETTE_TAG) MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_MUTED) MCFG_CASSETTE_ADD(CASSETTE2_TAG) MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_MUTED) MCFG_RS232_PORT_ADD(RS232_V24_TAG, default_rs232_devices, nullptr) MCFG_RS232_PORT_ADD(RS232_PRN_TAG, default_rs232_devices, nullptr) // internal ram MCFG_RAM_ADD(RAM_TAG) MCFG_RAM_DEFAULT_SIZE("32K") MACHINE_CONFIG_END //************************************************************************** // ROMS //************************************************************************** //------------------------------------------------- // ROM( newbrain ) //------------------------------------------------- ROM_START( newbrain ) ROM_REGION( 0x6000, Z80_TAG, 0 ) ROM_DEFAULT_BIOS( "rom20" ) ROM_SYSTEM_BIOS( 0, "issue1", "Issue 1 (v?)" ) ROMX_LOAD( "aben.ic6", 0x0000, 0x2000, CRC(308f1f72) SHA1(a6fd9945a3dca47636887da2125fde3f9b1d4e25), ROM_BIOS(1) ) ROMX_LOAD( "cd iss 1.ic7", 0x2000, 0x2000, CRC(6b4d9429) SHA1(ef688be4e75aced61f487c928258c8932a0ae00a), ROM_BIOS(1) ) ROMX_LOAD( "ef iss 1.ic8", 0x4000, 0x2000, CRC(20dd0b49) SHA1(74b517ca223cefb588e9f49e72ff2d4f1627efc6), ROM_BIOS(1) ) ROM_SYSTEM_BIOS( 1, "issue2", "Issue 2 (v1.9)" ) ROMX_LOAD( "aben19.ic6", 0x0000, 0x2000, CRC(d0283eb1) SHA1(351d248e69a77fa552c2584049006911fb381ff0), ROM_BIOS(2) ) ROMX_LOAD( "cdi2.ic7", 0x2000, 0x2000, CRC(6b4d9429) SHA1(ef688be4e75aced61f487c928258c8932a0ae00a), ROM_BIOS(2) ) ROMX_LOAD( "ef iss 1.ic8", 0x4000, 0x2000, CRC(20dd0b49) SHA1(74b517ca223cefb588e9f49e72ff2d4f1627efc6), ROM_BIOS(2) ) ROM_SYSTEM_BIOS( 2, "issue3", "Issue 3 (v1.91)" ) ROMX_LOAD( "aben191.ic6", 0x0000, 0x2000, CRC(b7be8d89) SHA1(cce8d0ae7aa40245907ea38b7956c62d039d45b7), ROM_BIOS(3) ) ROMX_LOAD( "cdi3.ic7", 0x2000, 0x2000, CRC(6b4d9429) SHA1(ef688be4e75aced61f487c928258c8932a0ae00a), ROM_BIOS(3) ) ROMX_LOAD( "ef iss 1.ic8", 0x4000, 0x2000, CRC(20dd0b49) SHA1(74b517ca223cefb588e9f49e72ff2d4f1627efc6), ROM_BIOS(3) ) ROM_SYSTEM_BIOS( 3, "series2", "Series 2 (v?)" ) ROMX_LOAD( "abs2.ic6", 0x0000, 0x2000, CRC(9a042acb) SHA1(80d83a2ea3089504aa68b6cf978d80d296cd9bda), ROM_BIOS(4) ) ROMX_LOAD( "cds2.ic7", 0x2000, 0x2000, CRC(6b4d9429) SHA1(ef688be4e75aced61f487c928258c8932a0ae00a), ROM_BIOS(4) ) ROMX_LOAD( "efs2.ic8", 0x4000, 0x2000, CRC(b222d798) SHA1(c0c816b4d4135b762f2c5f1b24209d0096f22e56), ROM_BIOS(4) ) ROM_SYSTEM_BIOS( 4, "rom20", "? (v2.0)" ) ROMX_LOAD( "aben20.rom", 0x0000, 0x2000, CRC(3d76d0c8) SHA1(753b4530a518ad832e4b81c4e5430355ba3f62e0), ROM_BIOS(5) ) ROMX_LOAD( "cd20tci.rom", 0x2000, 0x4000, CRC(f65b2350) SHA1(1ada7fbf207809537ec1ffb69808524300622ada), ROM_BIOS(5) ) ROM_REGION( 0x400, COP420_TAG, 0 ) ROM_LOAD( "cop420.419", 0x000, 0x400, CRC(a1388ee7) SHA1(5822e16aa794545600bf7a9dbee2ef467ca2a3e0) ) ROM_REGION( 0x1000, "chargen", ROMREGION_ERASE00 ) ROM_LOAD( "char eprom iss 1.ic453", 0x0000, 0x0a01, CRC(46ecbc65) SHA1(3fe064d49a4de5e3b7383752e98ad35a674e26dd) ) // 8248R7 bad dump! ROM_END //------------------------------------------------- // ROM( newbraina ) //------------------------------------------------- #define rom_newbraina rom_newbrain //------------------------------------------------- // ROM( newbrainmd ) //------------------------------------------------- ROM_START( newbrainmd ) ROM_REGION( 0x10000, Z80_TAG, 0 ) ROM_LOAD( "cdmd.rom", 0x2000, 0x2000, CRC(6b4d9429) SHA1(ef688be4e75aced61f487c928258c8932a0ae00a) ) ROM_LOAD( "efmd.rom", 0x4000, 0x2000, CRC(20dd0b49) SHA1(74b517ca223cefb588e9f49e72ff2d4f1627efc6) ) ROM_REGION( 0x400, COP420_TAG, 0 ) ROM_LOAD( "cop420.419", 0x000, 0x400, CRC(a1388ee7) SHA1(5822e16aa794545600bf7a9dbee2ef467ca2a3e0) ) ROM_REGION( 0x1000, "chargen", 0 ) ROM_LOAD( "char eprom iss 1.ic453", 0x0000, 0x0a01, BAD_DUMP CRC(46ecbc65) SHA1(3fe064d49a4de5e3b7383752e98ad35a674e26dd) ) // 8248R7 ROM_END //************************************************************************** // SYSTEM DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME FLAGS COMP( 1981, newbrain, 0, 0, newbrain, newbrain, driver_device, 0, "Grundy Business Systems Ltd", "NewBrain AD", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND ) COMP( 1981, newbraina, newbrain, 0, newbrain, newbrain, driver_device, 0, "Grundy Business Systems Ltd", "NewBrain A", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND ) COMP( 1981, newbrainmd, newbrain, 0, newbrain, newbrain, driver_device, 0, "Grundy Business Systems Ltd", "NewBrain MD", MACHINE_NOT_WORKING | MACHINE_SUPPORTS_SAVE | MACHINE_NO_SOUND )