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cchess2: fix sound (nw)

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This commit is contained in:
hap 2020-03-26 10:27:18 +01:00
parent efe4b7995b
commit ee3207cb2e
1 changed files with 19 additions and 12 deletions
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31
src/mame/drivers/conic_cchess2.cpp
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@ -21,11 +21,6 @@ Hardware notes:
- 4KB ROM(AMI), 1KB RAM(2*Synertek 1024x4)
- beeper, 8*8 leds, plug board
TODO:
- beeper is more complex than currently emulated, it can do a dual-tone siren
when there is an error(leds blink), and it's supposed to turn off when Clear
is pressed during boot(leds off). It is connected to one of the 75492 chips.
BTANB:
- Learn button still works when in modify-mode
@ -35,7 +30,8 @@ BTANB:
#include "cpu/m6502/m6504.h"
#include "machine/6821pia.h"
#include "machine/sensorboard.h"
#include "sound/beep.h"
#include "sound/dac.h"
#include "sound/volt_reg.h"
#include "video/pwm.h"
#include "speaker.h"
@ -54,7 +50,7 @@ public:
m_pia(*this, "pia%u", 0),
m_board(*this, "board"),
m_display(*this, "display"),
m_beeper(*this, "beeper"),
m_dac(*this, "dac"),
m_inputs(*this, "IN.%u", 0)
{ }
@ -73,7 +69,7 @@ private:
required_device_array<pia6821_device, 2> m_pia;
required_device<sensorboard_device> m_board;
required_device<pwm_display_device> m_display;
required_device<beep_device> m_beeper;
required_device<dac_bit_interface> m_dac;
required_ioport_array<8> m_inputs;
// address maps
@ -81,6 +77,7 @@ private:
// I/O handlers
void update_display();
void update_dac();
DECLARE_WRITE8_MEMBER(pia0_pa_w);
DECLARE_WRITE8_MEMBER(pia0_pb_w);
DECLARE_READ8_MEMBER(pia1_pa_r);
@ -89,12 +86,14 @@ private:
u8 m_inp_mux = 0;
u8 m_led_data = 0;
int m_dac_on = 0;
};
void cchess2_state::machine_start()
{
save_item(NAME(m_inp_mux));
save_item(NAME(m_led_data));
save_item(NAME(m_dac_on));
}
@ -108,11 +107,18 @@ void cchess2_state::update_display()
m_display->matrix(m_inp_mux, m_led_data);
}
void cchess2_state::update_dac()
{
m_dac->write(m_dac_on & BIT(m_inp_mux, 1));
}
WRITE8_MEMBER(cchess2_state::pia0_pa_w)
{
// d0-d7: input mux/led select
// d1: dac data
m_inp_mux = data;
update_display();
update_dac();
}
WRITE8_MEMBER(cchess2_state::pia0_pb_w)
@ -148,8 +154,9 @@ READ8_MEMBER(cchess2_state::pia1_pb_r)
WRITE8_MEMBER(cchess2_state::pia1_pb_w)
{
// d7: beeper on
m_beeper->set_state(BIT(data, 7));
// d7: dac on
m_dac_on = BIT(data, 7);
update_dac();
}
@ -251,8 +258,8 @@ void cchess2_state::cncchess2(machine_config &config)
/* sound hardware */
SPEAKER(config, "speaker").front_center();
BEEP(config, m_beeper, 1000); // wrong, see TODO
m_beeper->add_route(ALL_OUTPUTS, "speaker", 0.25);
DAC_1BIT(config, m_dac).add_route(ALL_OUTPUTS, "speaker", 0.25);
VOLTAGE_REGULATOR(config, "vref").add_route(0, "dac", 1.0, DAC_VREF_POS_INPUT);
}