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|
// 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);
}
static ASCII_KEYBOARD_INTERFACE( keyboard_intf )
{
DEVCB_DRIVER_MEMBER(abc80_state, kbd_w)
};
//**************************************************************************
// 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_ABC80_KEYBOARD_ADD(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_ASCII_KEYBOARD_ADD(KEYBOARD_TAG, keyboard_intf)
// 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 )
|