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Namco custom fix (#6598)

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* namco06: clarify timer delay is zero.

* galaga: fix bootlegs

For both, set sub & sub2 reset lines

Wire up 51xx cs and rw lines for galaga bootlegs.
This commit is contained in:
Mike 2020-04-26 14:37:32 -07:00 committed by Vas Crabb
parent 6c3c2044c0
commit e1fb6087cd
2 changed files with 14 additions and 4 deletions
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13
src/mame/drivers/galaga.cpp
View File

@ -1753,11 +1753,17 @@ void galaga_state::galagab(machine_config &config)
config.device_remove("06xx");
config.device_remove("54xx");
ls259_device* misclatch = reinterpret_cast<ls259_device*>(config.device("misclatch"));
misclatch->q_out_cb<3>().set_nop(); // 54xx reset line
// galaga has the custom chips on this line, so just set the resets this
// board has
misclatch->q_out_cb<3>().set_inputline("sub", INPUT_LINE_RESET).invert();
misclatch->q_out_cb<3>().append_inputline("sub2", INPUT_LINE_RESET).invert();
misclatch->q_out_cb<3>().append_inputline("sub3", INPUT_LINE_RESET).invert();
/* FIXME: bootlegs should not have any Namco custom chip. However, this workaround is needed atm */
namco_06xx_device &n06xx(NAMCO_06XX(config, "06xx", MASTER_CLOCK/6/64));
n06xx.set_maincpu(m_maincpu);
n06xx.chip_select_callback<0>().set("51xx", FUNC(namco_51xx_device::chip_select));
n06xx.rw_callback<0>().set("51xx", FUNC(namco_51xx_device::rw));
n06xx.read_callback<0>().set("51xx", FUNC(namco_51xx_device::read));
n06xx.write_callback<0>().set("51xx", FUNC(namco_51xx_device::write));
@ -1860,7 +1866,10 @@ void battles_state::battles(machine_config &config)
config.device_remove("54xx");
config.device_remove("06xx");
ls259_device* misclatch = reinterpret_cast<ls259_device*>(config.device("misclatch"));
misclatch->q_out_cb<3>().set_nop(); // 54xx reset line
// xevious has the custom chips on this line, so just set the resets
// this board has
misclatch->q_out_cb<3>().set_inputline("sub", INPUT_LINE_RESET).invert();
misclatch->q_out_cb<3>().append_inputline("sub2", INPUT_LINE_RESET).invert();
/* FIXME: bootlegs should not have any Namco custom chip. However, this workaround is needed atm */
namco_06xx_device &n06xx(NAMCO_06XX(config, "06xx", MASTER_CLOCK/6/64));

5
src/mame/machine/namco06.cpp
View File

@ -206,8 +206,9 @@ void namco_06xx_device::ctrl_w(uint8_t data)
uint8_t num_shifts = (m_control & 0xe0) >> 5;
uint8_t divisor = 1 << num_shifts;
// The next change happens on the next clock falling edge.
m_nmi_timer->adjust(attotime::from_ticks(0, clock()), 0, attotime::from_hz(clock() / divisor) / 2);
// The next change should happen on the next clock falling edge.
// Xevious' race causes this to bootloopsif it isn't 0.
m_nmi_timer->adjust(attotime::zero, 0, attotime::from_hz(clock() / divisor) / 2);
}
}