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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Namesoft MIDI Interface cartridge emulation
**********************************************************************/
#include "emu.h"
#include "midi_namesoft.h"
#include "machine/clock.h"
#include "bus/midi/midi.h"
//**************************************************************************
// MACROS/CONSTANTS
//**************************************************************************
#define MC6850_TAG "mc6850"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(C64_MIDI_NAMESOFT, c64_namesoft_midi_cartridge_device, "c64_midins", "C64 Namesoft MIDI")
WRITE_LINE_MEMBER( c64_namesoft_midi_cartridge_device::acia_irq_w )
{
m_slot->nmi_w(state);
}
WRITE_LINE_MEMBER( c64_namesoft_midi_cartridge_device::write_acia_clock )
{
m_acia->write_txc(state);
m_acia->write_rxc(state);
}
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void c64_namesoft_midi_cartridge_device::device_add_mconfig(machine_config &config)
{
ACIA6850(config, m_acia, 0);
m_acia->txd_handler().set("mdout", FUNC(midi_port_device::write_txd));
m_acia->irq_handler().set(FUNC(c64_namesoft_midi_cartridge_device::acia_irq_w));
MIDI_PORT(config, "mdin", midiin_slot, "midiin").rxd_handler().set(m_acia, FUNC(acia6850_device::write_rxd));
MIDI_PORT(config, "mdout", midiout_slot, "midiout");
clock_device &acia_clock(CLOCK(config, "acia_clock", 31250*16));
acia_clock.signal_handler().set(FUNC(c64_namesoft_midi_cartridge_device::write_acia_clock));
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// c64_namesoft_midi_cartridge_device - constructor
//-------------------------------------------------
c64_namesoft_midi_cartridge_device::c64_namesoft_midi_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
device_t(mconfig, C64_MIDI_NAMESOFT, tag, owner, clock),
device_c64_expansion_card_interface(mconfig, *this),
m_acia(*this, MC6850_TAG)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void c64_namesoft_midi_cartridge_device::device_start()
{
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void c64_namesoft_midi_cartridge_device::device_reset()
{
m_acia->reset();
}
//-------------------------------------------------
// c64_cd_r - cartridge data read
//-------------------------------------------------
uint8_t c64_namesoft_midi_cartridge_device::c64_cd_r(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!io1)
{
switch (offset & 0xff)
{
case 2:
case 3:
data = m_acia->read(offset & 1);
break;
}
}
return data;
}
//-------------------------------------------------
// c64_cd_w - cartridge data write
//-------------------------------------------------
void c64_namesoft_midi_cartridge_device::c64_cd_w(offs_t offset, uint8_t data, int sphi2, int ba, int roml, int romh, int io1, int io2)
{
if (!io1)
{
switch (offset & 0xff)
{
case 0:
case 1:
m_acia->write(offset & 1, data);
break;
}
}
}
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