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(nw) gaelco.cpp: Big Karnak clocks - Use OSC based clocks

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Based of picture: https://ibb.co/0XBwxzX

68000 @ 12MHz like all other PCBs in drivers/gaelco.cpp
6809E @ 2MHz (8MHz / 4) - complete guess
YM3812 @ 4MHz (8MHz / 2)
OKI 6295 @ 1MHz (8MHz / 8) - no 1.056MHz resonator on PCB
This commit is contained in:
braintro 2019-10-06 01:39:27 -05:00
parent 8a19731ee1
commit 830cf62af6
1 changed files with 5 additions and 5 deletions
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10
src/mame/drivers/gaelco.cpp
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@ -635,15 +635,15 @@ void gaelco_state::machine_start()
m_okibank->configure_entries(0, 16, memregion("oki")->base(), 0x10000);
}
// TODO: verify all clocks (XTALs are 8867.23 kHz and 24.000 MHz)
// TODO: verify all clocks (XTALs are 8.0MHz & 24.000 MHz) - One PCB reported to have 8867.23 kHz instead of 8MHz
void gaelco_state::bigkarnk(machine_config &config)
{
/* basic machine hardware */
M68000(config, m_maincpu, 10000000); /* MC68000P10, 10 MHz? */
M68000(config, m_maincpu, XTAL(24'000'000)/2); /* MC68000P10, 12 MHz? */
m_maincpu->set_addrmap(AS_PROGRAM, &gaelco_state::bigkarnk_map);
m_maincpu->set_vblank_int("screen", FUNC(gaelco_state::irq6_line_hold));
MC6809E(config, m_audiocpu, 8867000/4); /* 68B09EP, 2.21675 MHz? */
MC6809E(config, m_audiocpu, XTAL(8'000'000)/4); /* 68B09EP, 2 MHz? */
m_audiocpu->set_addrmap(AS_PROGRAM, &gaelco_state::bigkarnk_snd_map);
config.m_minimum_quantum = attotime::from_hz(600);
@ -674,9 +674,9 @@ void gaelco_state::bigkarnk(machine_config &config)
GENERIC_LATCH_8(config, m_soundlatch);
m_soundlatch->data_pending_callback().set_inputline(m_audiocpu, M6809_FIRQ_LINE);
YM3812(config, "ymsnd", 24_MHz_XTAL / 6).add_route(ALL_OUTPUTS, "mono", 1.0); // 4 MHz matches PCB recording
YM3812(config, "ymsnd", XTAL(8'000'000)/2).add_route(ALL_OUTPUTS, "mono", 1.0); // 4 MHz matches PCB recording
OKIM6295(config, "oki", 1056000, okim6295_device::PIN7_HIGH).add_route(ALL_OUTPUTS, "mono", 1.0); // clock frequency & pin 7 not verified
OKIM6295(config, "oki", XTAL(8'000'000)/8, okim6295_device::PIN7_HIGH).add_route(ALL_OUTPUTS, "mono", 1.0); // clock frequency & pin 7 not verified
}
void gaelco_state::maniacsq(machine_config &config)