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Update speedatk.cpp

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fixed clock frequency of Z80 and AY-3-8910 based on video footage of real PCB.

https://twitter.com/BEEP_SHOP/status/1385425741236432897
This commit is contained in:
wd40yasu 2023-09-16 20:57:12 +09:00
parent 1ea6071031
commit 1d4fa8ebd0
1 changed files with 2 additions and 2 deletions
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4
src/mame/seta/speedatk.cpp
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@ -456,7 +456,7 @@ void speedatk_state::output_w(uint8_t data)
void speedatk_state::speedatk(machine_config &config)
{
Z80(config, m_maincpu, MASTER_CLOCK/2); //divider is unknown
Z80(config, m_maincpu, MASTER_CLOCK/4); //divider is unknown
m_maincpu->set_addrmap(AS_PROGRAM, &speedatk_state::speedatk_mem);
m_maincpu->set_addrmap(AS_IO, &speedatk_state::speedatk_io);
m_maincpu->set_vblank_int("screen", FUNC(speedatk_state::irq0_line_hold));
@ -482,7 +482,7 @@ void speedatk_state::speedatk(machine_config &config)
/* sound hardware */
SPEAKER(config, "mono").front_center();
ay8910_device &aysnd(AY8910(config, "aysnd", MASTER_CLOCK/4)); //divider is unknown
ay8910_device &aysnd(AY8910(config, "aysnd", MASTER_CLOCK/8)); //divider is unknown
aysnd.port_b_read_callback().set_ioport("DSW");
aysnd.port_a_write_callback().set(FUNC(speedatk_state::output_w));
aysnd.add_route(ALL_OUTPUTS, "mono", 0.5);