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|
/***************************************************************************
drivers/mc1502.c
Driver file for Electronika MC 1502
***************************************************************************/
#include "emu.h"
#include "includes/mc1502.h"
#include "cpu/i86/i86.h"
#include "imagedev/serial.h"
#include "machine/kb_7007_3.h"
#include "sound/speaker.h"
#include "sound/wave.h"
#include "video/pc_cga.h"
#define VERBOSE_DBG 0
#define DBG_LOG(N,M,A) \
do { \
if(VERBOSE_DBG>=N) \
{ \
if( M ) \
logerror("%11.6f: %-24s",machine().time().as_double(),(char*)M ); \
logerror A; \
} \
} while (0)
/*
* onboard devices:
*/
static const cassette_interface mc1502_cassette_interface =
{
cassette_default_formats,
NULL,
(cassette_state)(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED),
NULL,
NULL
};
static const serial_image_interface mc1502_serial =
{
9600, 8, 1, device_serial_interface::PARITY_NONE, 1, "upd8251"
};
// Timer
static const isa8bus_interface mc1502_isabus_intf =
{
// interrupts
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir2_w),
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir3_w),
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir4_w),
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir5_w),
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir6_w),
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir7_w),
// dma request
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
};
/* check if any keys are pressed, raise IRQ1 if so */
TIMER_CALLBACK_MEMBER(mc1502_state::keyb_signal_callback)
{
UINT8 key = 0;
key |= ioport("Y1")->read();
key |= ioport("Y2")->read();
key |= ioport("Y3")->read();
key |= ioport("Y4")->read();
key |= ioport("Y5")->read();
key |= ioport("Y6")->read();
key |= ioport("Y7")->read();
key |= ioport("Y8")->read();
key |= ioport("Y9")->read();
key |= ioport("Y10")->read();
key |= ioport("Y11")->read();
key |= ioport("Y12")->read();
// DBG_LOG(1,"mc1502_k_s_c",("= %02X (%d) %s\n", key, m_kbd.pulsing,
// (key || m_kbd.pulsing) ? " will IRQ" : ""));
/*
If a key is pressed and we're not pulsing yet, start pulsing the IRQ1;
keep pulsing while any key is pressed, and pulse one time after all keys
are released.
*/
if (key) {
if (m_kbd.pulsing < 2) {
m_kbd.pulsing += 2;
}
}
if (m_kbd.pulsing) {
m_pic8259->ir1_w(m_kbd.pulsing & 1);
m_kbd.pulsing--;
}
}
WRITE8_MEMBER(mc1502_state::mc1502_ppi_porta_w)
{
m_centronics->write(space, 0, data);
}
WRITE8_MEMBER(mc1502_state::mc1502_ppi_portb_w)
{
// DBG_LOG(2,"mc1502_ppi_portb_w",("( %02X )\n", data));
m_ppi_portb = data;
machine().device<pit8253_device>("pit8253")->gate2_w(BIT(data, 0));
// mc1502_speaker_set_spkrdata(BIT(data, 1));
m_centronics->strobe_w(BIT(data, 2));
m_centronics->autofeed_w(BIT(data, 3));
m_centronics->init_prime_w(BIT(data, 4));
}
// bit 0: parallel port data transfer direction (default = 0 = out)
// bits 1-2: CGA_FONT (default = 01)
// bit 3: i8251 SYNDET pin triggers NMI (default = 1 = no)
WRITE8_MEMBER(mc1502_state::mc1502_ppi_portc_w)
{
// DBG_LOG(2,"mc1502_ppi_portc_w",("( %02X )\n", data));
m_ppi_portc = data & 15;
}
READ8_MEMBER(mc1502_state::mc1502_kppi_portc_r)
{
UINT8 data = 0;
data |= m_centronics->fault_r() << 4;
data |= m_centronics->pe_r() << 5;
data |= m_centronics->ack_r() << 6;
data |= m_centronics->busy_r() << 7;
return data;
}
// 0x80 -- serial RxD
// 0x40 -- CASS IN, also loops back T2OUT (gated by CASWR)
// 0x20 -- T2OUT
// 0x10 -- SNDOUT
READ8_MEMBER(mc1502_state::mc1502_ppi_portc_r)
{
int timer2_output = machine().device<pit8253_device>("pit8253")->get_output(2);
int data = 0xff;
double tap_val = m_cassette->input();
data = ( data & ~0x40 ) | ( tap_val < 0 ? 0x40 : 0x00 ) | ( (BIT(m_ppi_portb, 7) && timer2_output) ? 0x40 : 0x00 );
data = ( data & ~0x20 ) | ( timer2_output ? 0x20 : 0x00 );
data = ( data & ~0x10 ) | ( (BIT(m_ppi_portb, 1) && timer2_output) ? 0x10 : 0x00 );
// DBG_LOG(2,"mc1502_ppi_portc_r",("= %02X (tap_val %f t2out %d) at %s\n",
// data, tap_val, timer2_output, machine().describe_context()));
return data;
}
READ8_MEMBER(mc1502_state::mc1502_kppi_porta_r)
{
UINT8 key = 0;
if (m_kbd.mask & 0x0001) { key |= ioport("Y1")->read(); }
if (m_kbd.mask & 0x0002) { key |= ioport("Y2")->read(); }
if (m_kbd.mask & 0x0004) { key |= ioport("Y3")->read(); }
if (m_kbd.mask & 0x0008) { key |= ioport("Y4")->read(); }
if (m_kbd.mask & 0x0010) { key |= ioport("Y5")->read(); }
if (m_kbd.mask & 0x0020) { key |= ioport("Y6")->read(); }
if (m_kbd.mask & 0x0040) { key |= ioport("Y7")->read(); }
if (m_kbd.mask & 0x0080) { key |= ioport("Y8")->read(); }
if (m_kbd.mask & 0x0100) { key |= ioport("Y9")->read(); }
if (m_kbd.mask & 0x0200) { key |= ioport("Y10")->read(); }
if (m_kbd.mask & 0x0400) { key |= ioport("Y11")->read(); }
if (m_kbd.mask & 0x0800) { key |= ioport("Y12")->read(); }
key ^= 0xff;
// DBG_LOG(2,"mc1502_kppi_porta_r",("= %02X\n", key));
return key;
}
WRITE8_MEMBER(mc1502_state::mc1502_kppi_portb_w)
{
m_kbd.mask &= ~255;
m_kbd.mask |= data ^ 255;
if (!BIT(data, 0))
m_kbd.mask |= 1 << 11;
else
m_kbd.mask &= ~(1 << 11);
// DBG_LOG(2,"mc1502_kppi_portb_w",("( %02X -> %04X )\n", data, m_kbd.mask));
}
WRITE8_MEMBER(mc1502_state::mc1502_kppi_portc_w)
{
m_kbd.mask &= ~(7 << 8);
m_kbd.mask |= ((data ^ 7) & 7) << 8;
// DBG_LOG(2,"mc1502_kppi_portc_w",("( %02X -> %04X )\n", data, m_kbd.mask));
}
I8255_INTERFACE( mc1502_ppi8255_interface_1 )
{
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_ppi_porta_w),
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_ppi_portb_w),
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_ppi_portc_r),
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_ppi_portc_w)
};
I8255_INTERFACE( mc1502_ppi8255_interface_2 )
{
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_kppi_porta_r),
DEVCB_NULL,
DEVCB_NULL,
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_kppi_portb_w),
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_kppi_portc_r),
DEVCB_DRIVER_MEMBER(mc1502_state,mc1502_kppi_portc_w)
};
const i8251_interface mc1502_i8251_interface =
{
/* XXX RxD data are accessible via PPI port C, bit 7 */
DEVCB_NULL,
DEVCB_NULL,
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir7_w), /* default handler does nothing */
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir7_w),
DEVCB_NULL,
DEVCB_DRIVER_LINE_MEMBER(mc1502_state, mc1502_i8251_syndet)
};
WRITE_LINE_MEMBER(mc1502_state::mc1502_i8251_syndet)
{
if (!BIT(m_ppi_portc,3))
machine().firstcpu->set_input_line(INPUT_LINE_NMI, state ? ASSERT_LINE : CLEAR_LINE);
}
WRITE_LINE_MEMBER(mc1502_state::mc1502_pit8253_out1_changed)
{
machine().device<i8251_device>("upd8251")->txc_w(state);
machine().device<i8251_device>("upd8251")->rxc_w(state);
}
WRITE_LINE_MEMBER(mc1502_state::mc1502_pit8253_out2_changed)
{
// mc1502_speaker_set_input( state );
m_cassette->output(state ? 1 : -1);
}
const struct pit8253_interface mc1502_pit8253_config =
{
{
{
XTAL_15MHz/12, /* heartbeat IRQ */
DEVCB_NULL,
DEVCB_DEVICE_LINE_MEMBER("pic8259", pic8259_device, ir0_w)
}, {
XTAL_16MHz/12, /* serial port */
DEVCB_NULL,
DEVCB_DRIVER_LINE_MEMBER(mc1502_state,mc1502_pit8253_out1_changed)
}, {
XTAL_16MHz/12, /* pio port c pin 4, and speaker polling enough */
DEVCB_NULL,
DEVCB_DRIVER_LINE_MEMBER(mc1502_state,mc1502_pit8253_out2_changed)
}
}
};
IRQ_CALLBACK_MEMBER( mc1502_state::mc1502_irq_callback )
{
return m_pic8259->acknowledge();
}
DRIVER_INIT_MEMBER( mc1502_state, mc1502 )
{
address_space &program = m_maincpu->space(AS_PROGRAM);
DBG_LOG(0,"init",("driver_init()\n"));
program.unmap_readwrite(0, 0x7ffff);
program.install_readwrite_bank(0, m_ram->size()-1, "bank10");
membank( "bank10" )->set_base( m_ram->pointer() );
}
MACHINE_START_MEMBER( mc1502_state, mc1502 )
{
DBG_LOG(0,"init",("machine_start()\n"));
m_maincpu->set_irq_acknowledge_callback(device_irq_acknowledge_delegate(FUNC(mc1502_state::mc1502_irq_callback),this));
/*
Keyboard polling circuit holds IRQ1 high until a key is
pressed, then it starts a timer that pulses IRQ1 low each
40ms (check) for 20ms (check) until all keys are released.
Last pulse causes BIOS to write a 'break' scancode into port 60h.
*/
m_pic8259->ir1_w(1);
memset(&m_kbd, 0, sizeof(m_kbd));
m_kbd.keyb_signal_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(mc1502_state::keyb_signal_callback),this));
m_kbd.keyb_signal_timer->adjust( attotime::from_msec(20), 0, attotime::from_msec(20) );
}
MACHINE_RESET_MEMBER( mc1502_state, mc1502 )
{
DBG_LOG(0,"init",("machine_reset()\n"));
}
/*
* macros
*/
static ADDRESS_MAP_START( mc1502_map, AS_PROGRAM, 8, mc1502_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00000, 0x97fff) AM_RAM /* 96K on mainboard + 512K on extension card */
AM_RANGE(0xc0000, 0xfbfff) AM_NOP
// AM_RANGE(0xe8000, 0xeffff) AM_ROM /* BASIC */
AM_RANGE(0xfc000, 0xfffff) AM_ROM
ADDRESS_MAP_END
static ADDRESS_MAP_START( pk88_map, AS_PROGRAM, 8, mc1502_state )
ADDRESS_MAP_UNMAP_HIGH
AM_RANGE(0x00000, 0x1ffff) AM_RAMBANK("bank10") /* 96K on mainboard */
AM_RANGE(0xf0000, 0xf7fff) AM_ROM /* BASIC */
AM_RANGE(0xfc000, 0xfffff) AM_ROM
ADDRESS_MAP_END
static ADDRESS_MAP_START(mc1502_io, AS_IO, 8, mc1502_state )
AM_RANGE(0x0020, 0x0021) AM_DEVREADWRITE("pic8259", pic8259_device, read, write)
AM_RANGE(0x0028, 0x0028) AM_DEVREADWRITE("upd8251", i8251_device, data_r, data_w) // not working yet
AM_RANGE(0x0029, 0x0029) AM_DEVREADWRITE("upd8251", i8251_device, status_r, control_w)
AM_RANGE(0x0040, 0x0043) AM_DEVREADWRITE("pit8253", pit8253_device, read, write)
AM_RANGE(0x0060, 0x0063) AM_DEVREADWRITE("ppi8255n1", i8255_device, read, write)
AM_RANGE(0x0068, 0x006B) AM_DEVREADWRITE("ppi8255n2", i8255_device, read, write) // keyboard poll
ADDRESS_MAP_END
static INPUT_PORTS_START( mc1502 )
PORT_START("IN0") /* IN0 */
PORT_BIT ( 0xf0, 0xf0, IPT_UNUSED )
PORT_BIT ( 0x08, 0x08, IPT_CUSTOM ) PORT_VBLANK("screen")
PORT_BIT ( 0x07, 0x07, IPT_UNUSED )
PORT_INCLUDE( mc7007_3_keyboard )
PORT_INCLUDE( pcvideo_mc1502 )
INPUT_PORTS_END
static MACHINE_CONFIG_START( mc1502, mc1502_state )
/* basic machine hardware */
MCFG_CPU_ADD("maincpu", I8088, XTAL_16MHz/3)
MCFG_CPU_PROGRAM_MAP(mc1502_map)
MCFG_CPU_IO_MAP(mc1502_io)
MCFG_MACHINE_START_OVERRIDE( mc1502_state, mc1502 )
MCFG_MACHINE_RESET_OVERRIDE( mc1502_state, mc1502 )
MCFG_PIT8253_ADD( "pit8253", mc1502_pit8253_config )
MCFG_PIC8259_ADD( "pic8259", INPUTLINE("maincpu", 0), VCC, NULL )
MCFG_I8255_ADD( "ppi8255n1", mc1502_ppi8255_interface_1 )
MCFG_I8255_ADD( "ppi8255n2", mc1502_ppi8255_interface_2 )
MCFG_I8251_ADD( "upd8251", mc1502_i8251_interface )
MCFG_SERIAL_ADD( "irps", mc1502_serial )
MCFG_ISA8_BUS_ADD("isa", ":maincpu", mc1502_isabus_intf)
MCFG_ISA8_SLOT_ADD("isa", "isa1", mc1502_isa8_cards, "fdc", false)
MCFG_ISA8_SLOT_ADD("isa", "isa2", mc1502_isa8_cards, "rom", false)
/* video hardware (only 1 chargen in ROM; CGA_FONT dip always 1 */
MCFG_FRAGMENT_ADD( pcvideo_mc1502 )
/* sound hardware */
MCFG_SPEAKER_STANDARD_MONO("mono")
MCFG_SOUND_WAVE_ADD(WAVE_TAG, "cassette")
MCFG_SOUND_ADD("speaker", SPEAKER_SOUND, 0)
MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 0.80)
MCFG_CENTRONICS_PRINTER_ADD( "centronics", standard_centronics )
MCFG_CASSETTE_ADD( "cassette", mc1502_cassette_interface )
MCFG_SOFTWARE_LIST_ADD("flop_list","mc1502_flop")
// MCFG_SOFTWARE_LIST_ADD("cass_list","mc1502_cass")
/* internal ram */
MCFG_RAM_ADD(RAM_TAG)
MCFG_RAM_DEFAULT_SIZE("608K") /* 96 base + 512 on expansion card */
MCFG_RAM_EXTRA_OPTIONS("96K")
MACHINE_CONFIG_END
static MACHINE_CONFIG_DERIVED( pk88, mc1502 )
MCFG_CPU_REPLACE("maincpu", I8088, XTAL_16MHz/3)
MCFG_CPU_PROGRAM_MAP(pk88_map)
MCFG_CPU_IO_MAP(mc1502_io)
MACHINE_CONFIG_END
ROM_START( mc1502 )
ROM_REGION16_LE(0x100000,"maincpu", 0)
ROM_DEFAULT_BIOS("v52")
ROM_SYSTEM_BIOS(0, "v50", "v5.0")
ROMX_LOAD( "monitor_5_0.rom", 0xfc000, 0x4000, CRC(9e97c6a0) SHA1(16a304e8de69ec4d8b92acda6bf28454c361a24f),ROM_BIOS(1))
ROM_SYSTEM_BIOS(1, "v52", "v5.2")
ROMX_LOAD( "monitor_5_2.rom", 0xfc000, 0x4000, CRC(0e65491e) SHA1(8a4d556473b5e0e59b05fab77c79c29f4d562412),ROM_BIOS(2))
ROM_SYSTEM_BIOS(2, "v531", "v5.31")
ROMX_LOAD( "monitor_5_31.rom", 0xfc000, 0x4000, CRC(a48295d5) SHA1(6f38977c22f9cc6c2bc6f6e53edc4048ca6b6721),ROM_BIOS(3))
ROM_SYSTEM_BIOS(3, "v533", "v5.33")
ROMX_LOAD( "0_(cbc0).bin", 0xfc000, 0x2000, CRC(9a55bc4f) SHA1(81da44eec2e52cf04b1fc7053502270f51270590),ROM_BIOS(4))
ROMX_LOAD( "1_(dfe2).bin", 0xfe000, 0x2000, CRC(8dec077a) SHA1(d6f6d7cc2183abc77fbd9cd59132de5766f7c458),ROM_BIOS(4))
ROM_REGION(0x2000,"gfx1", ROMREGION_ERASE00)
ROM_LOAD( "symgen.rom", 0x0000, 0x2000, CRC(b2747a52) SHA1(6766d275467672436e91ac2997ac6b77700eba1e))
ROM_END
ROM_START( pk88 )
ROM_REGION16_LE(0x100000,"maincpu", 0)
ROM_LOAD( "b0.064", 0xf0000, 0x2000, CRC(80d3cf5d) SHA1(64769b7a8b60ffeefa04e4afbec778069a2840c9))
ROM_LOAD( "b1.064", 0xf2000, 0x2000, CRC(673a4acc) SHA1(082ae803994048e225150f771794ca305f73d731))
ROM_LOAD( "b2.064", 0xf4000, 0x2000, CRC(1ee66152) SHA1(7ed8c4c6c582487e802beabeca5b86702e5083e8))
ROM_LOAD( "b3.064", 0xf6000, 0x2000, CRC(3062b3fc) SHA1(5134dd64721cbf093d059ee5d3fd09c7f86604c7))
ROM_LOAD( "pk88-0.064", 0xfc000, 0x2000, CRC(1e4666cf) SHA1(6364c5241f2792909ff318194161eb2c29737546))
ROM_LOAD( "pk88-1.064", 0xfe000, 0x2000, CRC(6fa7e7ef) SHA1(d68bc273baa46ba733ac6ad4df7569dd70cf60dd))
ROM_REGION(0x2000,"gfx1", ROMREGION_ERASE00)
// taken from mc1502
ROM_LOAD( "symgen.rom", 0x0000, 0x2000, CRC(b2747a52) SHA1(6766d275467672436e91ac2997ac6b77700eba1e))
ROM_END
/***************************************************************************
Game driver(s)
***************************************************************************/
/* YEAR NAME PARENT COMPAT MACHINE INPUT INIT COMPANY FULLNAME */
COMP ( 1989, mc1502, ibm5150, 0, mc1502, mc1502, mc1502_state, mc1502, "NPO Microprocessor", "Elektronika MC-1502", 0)
COMP ( 1990, pk88, ibm5150, 0, pk88, mc1502, mc1502_state, mc1502, "NPO Microprocessor", "Elektronika PK-88", GAME_NOT_WORKING | GAME_NO_SOUND)
|