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8080bw.cpp, mw8080bw.cpp: Use 8080 INTE output to control interrupt generation

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* lrescuem2: Remove MB14241 device (bootleg code patches out all accesses)
This commit is contained in:
AJR 2022-02-21 22:25:06 -05:00
parent 8d9b8e60fb
commit 629ff520bc
5 changed files with 77 additions and 32 deletions
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77
src/mame/drivers/8080bw.cpp
View File

@ -827,11 +827,12 @@ void _8080bw_state::spacecom_io_map(address_map &map)
void _8080bw_state::spacecom(machine_config &config)
{
/* basic machine hardware */
I8080A(config, m_maincpu, XTAL(18'000'000) / 9); // divider guessed
i8080a_cpu_device &maincpu(I8080A(config, m_maincpu, XTAL(18'000'000) / 9)); // divider guessed
// TODO: move irq handling away from mw8080.c, this game runs on custom hardware
m_maincpu->set_addrmap(AS_PROGRAM, &_8080bw_state::spacecom_map);
m_maincpu->set_addrmap(AS_IO, &_8080bw_state::spacecom_io_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
maincpu.set_addrmap(AS_PROGRAM, &_8080bw_state::spacecom_map);
maincpu.set_addrmap(AS_IO, &_8080bw_state::spacecom_io_map);
maincpu.set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(_8080bw_state::int_enable_w));
MCFG_MACHINE_RESET_OVERRIDE(mw8080bw_state, mw8080bw)
@ -1120,6 +1121,18 @@ void _8080bw_state::lrescue_io_map(address_map &map)
map(0x03, 0x03).r(m_mb14241, FUNC(mb14241_device::shift_result_r)).w(FUNC(_8080bw_state::lrescue_sh_port_1_w));
map(0x04, 0x04).w(m_mb14241, FUNC(mb14241_device::shift_data_w));
map(0x05, 0x05).w(FUNC(_8080bw_state::lrescue_sh_port_2_w));
map(0x06, 0x06).nopw(); // noise? LED?
}
void _8080bw_state::lrescuem2_io_map(address_map &map)
{
map(0x00, 0x00).portr("IN0");
map(0x01, 0x01).portr("IN1");
map(0x02, 0x02).portr("IN2");
map(0x03, 0x03).w(FUNC(_8080bw_state::lrescue_sh_port_1_w));
map(0x04, 0x04).nopw(); // one leftover write
map(0x05, 0x05).w(FUNC(_8080bw_state::lrescue_sh_port_2_w));
map(0x06, 0x06).nopw(); // noise? LED?
}
@ -1164,13 +1177,23 @@ void _8080bw_state::lrescue(machine_config &config)
m_speaker->add_route(ALL_OUTPUTS, "mono", 0.25);
}
void _8080bw_state::lrescuem2(machine_config &config)
{
lrescue(config);
// no shifter
m_maincpu->set_addrmap(AS_IO, &_8080bw_state::lrescuem2_io_map);
config.device_remove("mb14241");
}
void _8080bw_state::escmars(machine_config &config)
{
/* basic machine hardware */
I8080(config, m_maincpu, XTAL(18'000'000) / 10); // divider guessed
m_maincpu->set_addrmap(AS_PROGRAM, &_8080bw_state::escmars_map);
m_maincpu->set_addrmap(AS_IO, &_8080bw_state::lrescue_io_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
i8080_cpu_device &maincpu(I8080(config, m_maincpu, XTAL(18'000'000) / 10)); // divider guessed
maincpu.set_addrmap(AS_PROGRAM, &_8080bw_state::escmars_map);
maincpu.set_addrmap(AS_IO, &_8080bw_state::lrescue_io_map);
maincpu.set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(_8080bw_state::int_enable_w));
MCFG_MACHINE_START_OVERRIDE(_8080bw_state, extra_8080bw)
MCFG_MACHINE_RESET_OVERRIDE(_8080bw_state, mw8080bw)
@ -1556,10 +1579,11 @@ void _8080bw_state::schaser(machine_config &config)
mw8080bw_root(config);
/* basic machine hardware */
I8080(config.replace(), m_maincpu, 1996800); /* 19.968MHz / 10 */
m_maincpu->set_addrmap(AS_PROGRAM, &_8080bw_state::schaser_map);
m_maincpu->set_addrmap(AS_IO, &_8080bw_state::schaser_io_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
i8080_cpu_device &maincpu(I8080(config.replace(), m_maincpu, 1996800)); /* 19.968MHz / 10 */
maincpu.set_addrmap(AS_PROGRAM, &_8080bw_state::schaser_map);
maincpu.set_addrmap(AS_IO, &_8080bw_state::schaser_io_map);
maincpu.set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(_8080bw_state::int_enable_w));
WATCHDOG_TIMER(config, m_watchdog).set_vblank_count("screen", 255);
MCFG_MACHINE_START_OVERRIDE(_8080bw_state,schaser)
@ -2775,11 +2799,12 @@ void _8080bw_state::shuttlei_io_map(address_map &map)
void _8080bw_state::shuttlei(machine_config &config)
{
/* basic machine hardware */
I8080(config, m_maincpu, XTAL(18'000'000) / 9);
i8080_cpu_device &maincpu(I8080(config, m_maincpu, XTAL(18'000'000) / 9));
// TODO: move irq handling away from mw8080.cpp, this game runs on custom hardware
m_maincpu->set_addrmap(AS_PROGRAM, &_8080bw_state::shuttlei_map);
m_maincpu->set_addrmap(AS_IO, &_8080bw_state::shuttlei_io_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
maincpu.set_addrmap(AS_PROGRAM, &_8080bw_state::shuttlei_map);
maincpu.set_addrmap(AS_IO, &_8080bw_state::shuttlei_io_map);
maincpu.set_irq_acknowledge_callback(FUNC(_8080bw_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(_8080bw_state::int_enable_w));
MCFG_MACHINE_START_OVERRIDE(_8080bw_state, extra_8080bw)
MCFG_MACHINE_RESET_OVERRIDE(_8080bw_state, mw8080bw)
@ -3862,10 +3887,11 @@ void cane_state::cane(machine_config &config)
mw8080bw_root(config);
// Basic machine hardware
I8080(config.replace(), m_maincpu, 1996800); /* 19.968MHz / 10 */
m_maincpu->set_addrmap(AS_PROGRAM, &cane_state::cane_map);
m_maincpu->set_addrmap(AS_IO, &cane_state::cane_io_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(cane_state::interrupt_vector));
i8080_cpu_device &maincpu(I8080(config.replace(), m_maincpu, 1996800)); /* 19.968MHz / 10 */
maincpu.set_addrmap(AS_PROGRAM, &cane_state::cane_map);
maincpu.set_addrmap(AS_IO, &cane_state::cane_io_map);
maincpu.set_irq_acknowledge_callback(FUNC(cane_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(cane_state::int_enable_w));
WATCHDOG_TIMER(config, m_watchdog).set_vblank_count("screen", 255);
@ -3968,10 +3994,11 @@ void orbite_state::orbite(machine_config &config)
mw8080bw_root(config);
// basic machine hardware
I8080(config.replace(), m_maincpu, 1996800); /* 19.968MHz / 10 */
m_maincpu->set_addrmap(AS_PROGRAM, &orbite_state::orbite_map);
m_maincpu->set_addrmap(AS_IO, &orbite_state::orbite_io_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(orbite_state::interrupt_vector));
i8080_cpu_device &maincpu(I8080(config.replace(), m_maincpu, 1996800)); /* 19.968MHz / 10 */
maincpu.set_addrmap(AS_PROGRAM, &orbite_state::orbite_map);
maincpu.set_addrmap(AS_IO, &orbite_state::orbite_io_map);
maincpu.set_irq_acknowledge_callback(FUNC(orbite_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(orbite_state::int_enable_w));
WATCHDOG_TIMER(config, m_watchdog).set_vblank_count("screen", 255);
@ -5740,7 +5767,7 @@ GAME( 1979, lrescue, 0, lrescue, lrescue, _8080bw_state, empty_i
GAME( 1979, grescue, lrescue, lrescue, lrescue, _8080bw_state, empty_init, ROT270, "Taito (Universal license?)", "Galaxy Rescue", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND )
GAME( 1980, mlander, lrescue, lrescue, lrescue, _8080bw_state, empty_init, ROT270, "bootleg (Leisure Time Electronics)", "Moon Lander (bootleg of Lunar Rescue)", MACHINE_SUPPORTS_SAVE )
GAME( 1979, lrescuem, lrescue, lrescue, lrescue, _8080bw_state, empty_init, ROT270, "bootleg (Model Racing)", "Lunar Rescue (Model Racing bootleg, set 1)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND )
GAME( 1979, lrescuem2, lrescue, lrescue, lrescue, _8080bw_state, empty_init, ROT270, "bootleg (Model Racing)", "Lunar Rescue (Model Racing bootleg, set 2)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND )
GAME( 1979, lrescuem2, lrescue, lrescuem2, lrescue, _8080bw_state, empty_init, ROT270, "bootleg (Model Racing)", "Lunar Rescue (Model Racing bootleg, set 2)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND )
GAME( 1979, desterth, lrescue, lrescue, lrescue, _8080bw_state, empty_init, ROT270, "bootleg", "Destination Earth (bootleg of Lunar Rescue)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND )
GAMEL(1980, escmars, lrescue, escmars, lrescue, _8080bw_state, empty_init, ROT270, "bootleg", "Escape from Mars (bootleg of Lunar Rescue)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND, layout_escmars )
GAMEL(1980, resclunar, lrescue, escmars, lrescue, _8080bw_state, empty_init, ROT270, "bootleg (Niemer S.A.)", "Rescate Lunar (Spanish bootleg of Lunar Rescue)", MACHINE_SUPPORTS_SAVE | MACHINE_IMPERFECT_SOUND, layout_escmars )

7
src/mame/drivers/mw8080bw.cpp
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@ -218,9 +218,10 @@ void mw8080bw_state::main_map(address_map &map)
void mw8080bw_state::mw8080bw_root(machine_config &config)
{
/* basic machine hardware */
I8080(config, m_maincpu, MW8080BW_CPU_CLOCK);
m_maincpu->set_addrmap(AS_PROGRAM, &mw8080bw_state::main_map);
m_maincpu->set_irq_acknowledge_callback(FUNC(mw8080bw_state::interrupt_vector));
i8080_cpu_device &maincpu(I8080(config, m_maincpu, MW8080BW_CPU_CLOCK));
maincpu.set_addrmap(AS_PROGRAM, &mw8080bw_state::main_map);
maincpu.set_irq_acknowledge_callback(FUNC(mw8080bw_state::interrupt_vector));
maincpu.out_inte_func().set(FUNC(mw8080bw_state::int_enable_w));
MCFG_MACHINE_RESET_OVERRIDE(mw8080bw_state,mw8080bw)

2
src/mame/includes/8080bw.h
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@ -53,6 +53,7 @@ public:
void spcewarla(machine_config &config);
void escmars(machine_config &config);
void lrescue(machine_config &config);
void lrescuem2(machine_config &config);
void invmulti(machine_config &config);
void yosakdon(machine_config &config);
void polaris(machine_config &config);
@ -254,6 +255,7 @@ private:
void invrvnge_io_map(address_map &map);
void invrvnge_sound_map(address_map &map);
void lrescue_io_map(address_map &map);
void lrescuem2_io_map(address_map &map);
void lupin3_io_map(address_map &map);
void polaris_io_map(address_map &map);
void rollingc_io_map(address_map &map);

7
src/mame/includes/mw8080bw.h
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@ -51,7 +51,8 @@ public:
m_watchdog(*this, "watchdog"),
m_main_ram(*this, "main_ram"),
m_discrete(*this, "discrete"),
m_screen(*this, "screen")
m_screen(*this, "screen"),
m_int_enable(true)
{ }
void blueshrk(machine_config &config);
@ -88,6 +89,8 @@ public:
protected:
virtual void machine_start() override;
DECLARE_WRITE_LINE_MEMBER(int_enable_w);
u8 mw8080bw_shift_result_rev_r();
int invaders_is_cabinet_cocktail();
@ -117,6 +120,8 @@ private:
attotime m_interrupt_time;
bool m_int_enable;
void tornbase_io_w(offs_t offset, uint8_t data);
void maze_coin_counter_w(uint8_t data);
void maze_io_w(offs_t offset, uint8_t data);

16
src/mame/machine/mw8080bw.cpp
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@ -50,9 +50,13 @@ TIMER_CALLBACK_MEMBER(mw8080bw_state::interrupt_trigger)
int vpos = m_screen->vpos();
uint8_t counter = vpos_to_vysnc_chain_counter(vpos);
m_maincpu->set_input_line(0, ASSERT_LINE);
m_interrupt_time = machine().time();
if (m_int_enable)
{
m_maincpu->set_input_line(0, ASSERT_LINE);
m_interrupt_time = machine().time();
}
else
m_maincpu->set_input_line(0, CLEAR_LINE);
/* set up for next interrupt */
uint8_t next_counter;
@ -73,6 +77,12 @@ TIMER_CALLBACK_MEMBER(mw8080bw_state::interrupt_trigger)
}
WRITE_LINE_MEMBER(mw8080bw_state::int_enable_w)
{
m_int_enable = state;
}
IRQ_CALLBACK_MEMBER(mw8080bw_state::interrupt_vector)
{
int vpos = m_screen->vpos();