// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** Maplin MIDI Interface cartridge emulation Copyright MESS Team. Visit http://mamedev.org for licensing and usage restrictions. **********************************************************************/ #include "midi_maplin.h" //************************************************************************** // MACROS/CONSTANTS //************************************************************************** #define MC6850_TAG "mc6850" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** const device_type C64_MIDI_MAPLIN = &device_creator; //------------------------------------------------- // ACIA6850_INTERFACE( acia_intf ) //------------------------------------------------- WRITE_LINE_MEMBER( c64_maplin_midi_cartridge_device::acia_irq_w ) { m_slot->irq_w(state); } static ACIA6850_INTERFACE( acia_intf ) { 500000, 0, // rx clock (we manually clock rx) DEVCB_DEVICE_LINE_MEMBER("mdout", serial_port_device, tx), DEVCB_NULL, DEVCB_DEVICE_LINE_MEMBER(DEVICE_SELF_OWNER, c64_maplin_midi_cartridge_device, acia_irq_w) }; //------------------------------------------------- // SLOT_INTERFACE( midiin_slot ) //------------------------------------------------- static SLOT_INTERFACE_START( midiin_slot ) SLOT_INTERFACE("midiin", MIDIIN_PORT) SLOT_INTERFACE_END WRITE_LINE_MEMBER( c64_maplin_midi_cartridge_device::midi_rx_w ) { m_acia->write_rx(state); for (int i = 0; i < 16; i++) // divider is set to 64 { m_acia->rx_clock_in(); } } //------------------------------------------------- // SLOT_INTERFACE( midiout_slot ) //------------------------------------------------- static SLOT_INTERFACE_START( midiout_slot ) SLOT_INTERFACE("midiout", MIDIOUT_PORT) SLOT_INTERFACE_END //------------------------------------------------- // MACHINE_CONFIG_FRAGMENT( c64_maplin_midi ) //------------------------------------------------- static MACHINE_CONFIG_FRAGMENT( c64_maplin_midi ) MCFG_ACIA6850_ADD(MC6850_TAG, acia_intf) MCFG_SERIAL_PORT_ADD("mdin", midiin_slot, "midiin") MCFG_SERIAL_OUT_RX_HANDLER(DEVWRITELINE(DEVICE_SELF, c64_maplin_midi_cartridge_device, midi_rx_w)) MCFG_SERIAL_PORT_ADD("mdout", midiout_slot, "midiout") MACHINE_CONFIG_END //------------------------------------------------- // machine_config_additions - device-specific // machine configurations //------------------------------------------------- machine_config_constructor c64_maplin_midi_cartridge_device::device_mconfig_additions() const { return MACHINE_CONFIG_NAME( c64_maplin_midi ); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // c64_maplin_midi_cartridge_device - constructor //------------------------------------------------- c64_maplin_midi_cartridge_device::c64_maplin_midi_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, C64_MIDI_MAPLIN, "C64 Maplin MIDI", tag, owner, clock, "c64_midimap", __FILE__), device_c64_expansion_card_interface(mconfig, *this), m_acia(*this, MC6850_TAG) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void c64_maplin_midi_cartridge_device::device_start() { // state saving } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void c64_maplin_midi_cartridge_device::device_reset() { m_acia->reset(); } //------------------------------------------------- // c64_cd_r - cartridge data read //------------------------------------------------- UINT8 c64_maplin_midi_cartridge_device::c64_cd_r(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io2) { switch (offset & 0xff) { case 0: data = m_acia->status_read(space, 0); break; case 1: data = m_acia->data_read(space, 0); break; } } return data; } //------------------------------------------------- // c64_cd_w - cartridge data write //------------------------------------------------- void c64_maplin_midi_cartridge_device::c64_cd_w(address_space &space, offs_t offset, UINT8 data, int sphi2, int ba, int roml, int romh, int io1, int io2) { if (!io2) { switch (offset & 0xff) { case 0: m_acia->control_write(space, 0, data); break; case 1: m_acia->data_write(space, 0, data); break; } } }