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witchcdg: More accurate, less hacky interface between PIA and PSG (nw)

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This commit is contained in:
AJR 2019-07-12 10:52:20 -04:00
parent 22a22af7e3
commit 5581efe84a
1 changed files with 31 additions and 15 deletions
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46
src/mame/drivers/goldnpkr.cpp
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@ -1374,7 +1374,9 @@ protected:
private:
DECLARE_READ8_MEMBER(goldnpkr_mux_port_r);
DECLARE_WRITE8_MEMBER(mux_port_w);
DECLARE_WRITE8_MEMBER(wcfalcon_snd_w);
uint8_t ay8910_data_r();
void ay8910_data_w(uint8_t data);
void ay8910_control_w(uint8_t data);
DECLARE_WRITE8_MEMBER(pia0_a_w);
DECLARE_WRITE8_MEMBER(pia0_b_w);
DECLARE_WRITE8_MEMBER(pia1_a_w);
@ -1413,6 +1415,8 @@ private:
tilemap_t *m_bg_tilemap;
uint8_t m_mux_data;
uint8_t m_pia0_PA_data;
uint8_t m_ay8910_data;
uint8_t m_ay8910_control;
};
class blitz_state : public goldnpkr_state
@ -1693,20 +1697,28 @@ WRITE8_MEMBER(goldnpkr_state::mux_port_w)
/* Demuxing ay8910 data/address from Falcon board, PIA portA out */
uint8_t wcfalcon_flag = 0;
WRITE8_MEMBER(goldnpkr_state::wcfalcon_snd_w)
uint8_t goldnpkr_state::ay8910_data_r()
{
if (wcfalcon_flag == 0)
{
m_ay8910->data_address_w(0, data);
}
else
{
m_ay8910->data_address_w(1, data);
}
return (m_ay8910_control & 0xc0) == 0x40 ? m_ay8910->data_r() : 0xff;
}
wcfalcon_flag = wcfalcon_flag ^ 1;
void goldnpkr_state::ay8910_data_w(uint8_t data)
{
m_ay8910_data = data;
}
void goldnpkr_state::ay8910_control_w(uint8_t data)
{
if (BIT(data, 7))
m_ay8910->data_address_w(BIT(data, 6), m_ay8910_data);
m_ay8910_control = data;
m_lamps[0] = !BIT(data, 0);
m_lamps[1] = !BIT(data, 1);
m_lamps[2] = !BIT(data, 2);
m_lamps[3] = !BIT(data, 3);
m_lamps[4] = !BIT(data, 4);
}
@ -4447,7 +4459,9 @@ void goldnpkr_state::wcfalcon(machine_config &config)
m_maincpu->set_addrmap(AS_PROGRAM, &goldnpkr_state::witchcrd_falcon_map);
m_pia[0]->writepa_handler().set(FUNC(goldnpkr_state::mux_port_w));
m_pia[1]->writepa_handler().set(FUNC(goldnpkr_state::wcfalcon_snd_w)); /* port A out, custom handler due to address + data are muxed */
m_pia[0]->writepb_handler().set(FUNC(goldnpkr_state::ay8910_control_w));
m_pia[1]->readpa_handler().set(FUNC(goldnpkr_state::ay8910_data_r));
m_pia[1]->writepa_handler().set(FUNC(goldnpkr_state::ay8910_data_w));
/* video hardware */
m_palette->set_init(FUNC(goldnpkr_state::witchcrd_palette));
@ -4509,7 +4523,9 @@ void goldnpkr_state::wildcrdb(machine_config &config)
mcu.set_addrmap(AS_IO, &goldnpkr_state::wildcrdb_mcu_io_map);
m_pia[0]->writepa_handler().set(FUNC(goldnpkr_state::mux_port_w));
m_pia[1]->writepa_handler().set(FUNC(goldnpkr_state::wcfalcon_snd_w));
m_pia[0]->writepb_handler().set(FUNC(goldnpkr_state::ay8910_control_w));
m_pia[1]->readpa_handler().set(FUNC(goldnpkr_state::ay8910_data_r));
m_pia[1]->writepa_handler().set(FUNC(goldnpkr_state::ay8910_data_w));
/* video hardware */
// m_gfxdecode->set_info(gfx_wildcard);