// 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 )