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segac2.cpp : Revert, Add notes for sound output

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cam900 2019-08-25 20:32:36 +09:00 committed by GitHub
parent 68a49f2c7e
commit ca51b0470c
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1 changed files with 8 additions and 3 deletions
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11
src/mame/drivers/segac2.cpp
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@ -1541,7 +1541,12 @@ WRITE_LINE_MEMBER(segac2_state::vdp_lv4irqline_callback_c2)
m_maincpu->set_input_line(4, CLEAR_LINE);
}
/*
sound output balance (tfrceac)
reference : https://youtu.be/AOmeWp9qe5E
reference 2 : https://youtu.be/Tq8VkJYmij8
reference 3: https://youtu.be/VId_HWdNuyA
*/
void segac2_state::segac(machine_config &config)
{
/* basic machine hardware */
@ -1572,7 +1577,7 @@ void segac2_state::segac(machine_config &config)
m_vdp->lv4_irq().set(FUNC(segac2_state::vdp_lv4irqline_callback_c2));
m_vdp->set_alt_timing(1);
m_vdp->set_screen("megadriv");
m_vdp->add_route(ALL_OUTPUTS, "mono", 0.80);
m_vdp->add_route(ALL_OUTPUTS, "mono", 0.50);
TIMER(config, "scantimer").configure_scanline("gen_vdp", FUNC(sega315_5313_device::megadriv_scanline_timer_callback_alt_timing), "megadriv", 0, 1);
@ -1593,7 +1598,7 @@ void segac2_state::segac(machine_config &config)
ym3438_device &ymsnd(YM3438(config, "ymsnd", XL2_CLOCK/7));
ymsnd.irq_handler().set(FUNC(segac2_state::segac2_irq2_interrupt));
ymsnd.add_route(0, "mono", 1.00);
ymsnd.add_route(0, "mono", 0.50);
/* right channel not connected */
}