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// license:BSD-3-Clause
// copyright-holders: Olivier Galibert
// Microdeal ST Replay
// A 8-bit mono DAC and a 8-bit mono ADC on a cartridge, with a vague
// lowpass filter.
// A peculiarity of the ST cartridge port is that it's readonly. So
// writing to the DAC is done by reading at an appropriate address.
#include "emu.h"
#include "replay.h"
#include "sound/adc.h"
#include "sound/dac.h"
#include "speaker.h"
namespace {
class st_replay_device : public device_t, public device_stcart_interface
{
public:
st_replay_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
virtual ~st_replay_device();
virtual void map(address_space_installer &space) override;
protected:
virtual void device_start() override ATTR_COLD;
virtual void device_reset() override ATTR_COLD;
virtual void device_add_mconfig(machine_config &config) override ATTR_COLD;
private:
required_device<zn449_device> m_adc;
required_device<zn429e_device> m_dac;
required_device<microphone_device> m_mic;
required_device<speaker_device> m_speaker;
void cartmap(address_map &map) ATTR_COLD;
u16 dac_w(offs_t data);
u8 adc_r();
};
st_replay_device::st_replay_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, ST_REPLAY, tag, owner, clock),
device_stcart_interface(mconfig, *this),
m_adc(*this, "adc"),
m_dac(*this, "dac"),
m_mic(*this, "mic"),
m_speaker(*this, "speaker")
{
}
st_replay_device::~st_replay_device()
{
}
u16 st_replay_device::dac_w(offs_t data)
{
m_dac->write(data);
return 0xffff;
}
u8 st_replay_device::adc_r()
{
double tm = machine().time().as_double();
s8 level = 127 * sin(tm*440*2*M_PI);
return level + 0x80;
}
void st_replay_device::map(address_space_installer &space)
{
space.install_device(0xfa0000, 0xfbffff, *this, &st_replay_device::cartmap);
}
void st_replay_device::cartmap(address_map &map)
{
map(0x00000, 0x001ff).r(FUNC(st_replay_device::dac_w)).mirror(0xfe00);
map(0x10001, 0x10001).r(m_adc, FUNC(zn449_device::read)).mirror(0xfffe);
}
void st_replay_device::device_add_mconfig(machine_config &config)
{
MICROPHONE(config, m_mic, 1).front_center();
m_mic->add_route(0, m_adc, 1.0, 0);
ZN449(config, m_adc);
// ZN429D the schematics say, not sure if any significant difference
ZN429E(config, m_dac);
m_dac->add_route(0, m_speaker, 1.0, 0);
SPEAKER(config, m_speaker, 1).front_center();
}
void st_replay_device::device_start()
{
}
void st_replay_device::device_reset()
{
}
} // anonymous namespace
DEFINE_DEVICE_TYPE_PRIVATE(ST_REPLAY, device_stcart_interface, st_replay_device, "st_replay", "Microdeal ST Replay")
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