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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Didaktik Melodik
**********************************************************************/
#include "emu.h"
#include "melodik.h"
#include "speaker.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(SPECTRUM_MELODIK, spectrum_melodik_device, "spectrum_melodik", "Didaktik Melodik")
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void spectrum_melodik_device::device_add_mconfig(machine_config &config)
{
/* sound hardware */
SPEAKER(config, "mono").front_center();
AY8912(config, m_psg, 3.579545_MHz_XTAL / 2);
m_psg->add_route(ALL_OUTPUTS, "mono", 0.25);
/* passthru */
SPECTRUM_EXPANSION_SLOT(config, m_exp, spectrum_expansion_devices, nullptr);
m_exp->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w));
m_exp->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// spectrum_melodik_device - constructor
//-------------------------------------------------
spectrum_melodik_device::spectrum_melodik_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, SPECTRUM_MELODIK, tag, owner, clock)
, device_spectrum_expansion_interface(mconfig, *this)
, m_exp(*this, "exp")
, m_psg(*this, "ay8912")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void spectrum_melodik_device::device_start()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
READ_LINE_MEMBER(spectrum_melodik_device::romcs)
{
return m_exp->romcs();
}
void spectrum_melodik_device::opcode_fetch(offs_t offset)
{
m_exp->opcode_fetch(offset);
}
uint8_t spectrum_melodik_device::mreq_r(offs_t offset)
{
uint8_t data = 0xff;
if (m_exp->romcs())
data &= m_exp->mreq_r(offset);
return data;
}
void spectrum_melodik_device::mreq_w(offs_t offset, uint8_t data)
{
if (m_exp->romcs())
m_exp->mreq_w(offset, data);
}
uint8_t spectrum_melodik_device::iorq_r(offs_t offset)
{
uint8_t data = m_exp->iorq_r(offset);
switch (offset & 0xc002)
{
case 0xc000:
data &= m_psg->data_r();
break;
}
return data;
}
void spectrum_melodik_device::iorq_w(offs_t offset, uint8_t data)
{
switch (offset & 0xc002)
{
case 0x8000:
m_psg->address_w(data);
break;
case 0xc000:
m_psg->data_w(data);
break;
}
m_exp->iorq_w(offset, data);
}
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