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dfjail: better balance, don't mute DAC when NMI disabled, speed up Z80 so it doesn't bog down [R. Belmont]

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This commit is contained in:
arbee 2021-07-06 21:00:24 -04:00
parent 633349ca06
commit b0bc45a6a4
1 changed files with 3 additions and 8 deletions
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11
src/mame/drivers/segas16b.cpp
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@ -1918,13 +1918,8 @@ void dfjail_state::sound_control_w(uint8_t data)
{
int size = memregion("soundcpu")->bytes() - 0x10000;
// NMI and presumably DAC output clear
// TODO: identify which is which
// NMI enable in bit 6
m_nmi_enable = ((data & 0xc0) == 0);
if (m_nmi_enable == false)
m_dac->write(0);
//m_upd7759->start_w(BIT(data, 7));
//m_upd7759->reset_w(BIT(data, 6));
int bankoffs = 0;
bankoffs = ((data & 0x08) >> 3) * 0x20000;
@ -4277,7 +4272,7 @@ void dfjail_state::dfjail(machine_config &config)
m_maincpu->set_addrmap(AS_PROGRAM, &dfjail_state::dfjail_map);
m_maincpu->set_vblank_int("screen", FUNC(dfjail_state::irq4_line_hold));
Z80(config.replace(), m_soundcpu, XTAL(16'000'000)/4); // ?
Z80(config.replace(), m_soundcpu, XTAL(16'000'000)/2); // ?
m_soundcpu->set_addrmap(AS_PROGRAM, &dfjail_state::bootleg_sound_map);
m_soundcpu->set_addrmap(AS_IO, &dfjail_state::dfjail_sound_iomap);
// connected to a 74ls74 clock source
@ -4286,7 +4281,7 @@ void dfjail_state::dfjail(machine_config &config)
//config.device_remove("ym2151");
config.device_remove("upd");
AD7533(config, m_dac, 0).add_route(ALL_OUTPUTS, "mono", 0.75); // AD7533KN
AD7533(config, m_dac, 0).add_route(ALL_OUTPUTS, "mono", 0.5); // AD7533KN
}