diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/midi_emr.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/midi_emr.cpp | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/midi_emr.cpp b/src/devices/bus/archimedes/podule/midi_emr.cpp new file mode 100644 index 00000000000..27127471c62 --- /dev/null +++ b/src/devices/bus/archimedes/podule/midi_emr.cpp @@ -0,0 +1,208 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + EMR MIDI Interface + + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/EMR_MIDI4.html + +**********************************************************************/ + +#include "emu.h" +#include "midi_emr.h" +#include "machine/input_merger.h" +#include "machine/mc68681.h" +#include "bus/midi/midi.h" + + +namespace { + +// ======================> arc_midi2_emr_device + +class arc_midi2_emr_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_midi2_emr_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device-level overrides + virtual void device_start() override; + virtual void device_reset() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + virtual const tiny_rom_entry *device_rom_region() const override; + + // device_archimedes_podule_interface overrides + virtual void ioc_map(address_map &map) override; + +private: + required_memory_region m_podule_rom; + + u8 m_rom_page; +}; + + +// ======================> arc_midi4_emr_device + +class arc_midi4_emr_device : + public device_t, + public device_archimedes_podule_interface +{ +public: + // construction/destruction + arc_midi4_emr_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // device-level overrides + virtual void device_start() override; + + // optional information overrides + virtual void device_add_mconfig(machine_config &config) override; + + // device_archimedes_podule_interface overrides + virtual void ioc_map(address_map &map) override; +}; + + +void arc_midi2_emr_device::ioc_map(address_map &map) +{ + map(0x0000, 0x1fff).lr8(NAME([this](offs_t offset) { return m_podule_rom->base()[offset | (((m_rom_page << 11) & 0x7800) ^ 0x4000)]; })).umask32(0x000000ff); + map(0x1000, 0x1000).lw8(NAME([this](u8 data) { m_rom_page = data; })); + map(0x2000, 0x203f).rw("uart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0x000000ff); +} + + +void arc_midi4_emr_device::ioc_map(address_map &map) +{ + map(0x2000, 0x203f).rw("uart1", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0x000000ff); + map(0x3000, 0x303f).rw("uart2", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0x000000ff); +} + + +//------------------------------------------------- +// ROM( midi2 ) +//------------------------------------------------- + +ROM_START( midi2 ) + ROM_REGION(0x8000, "podule_rom", 0) + ROM_SYSTEM_BIOS(0, "314", "V3.14/9/8/89") + ROMX_LOAD("emr_midi2_v3.14.bin", 0x0000, 0x8000, CRC(7de739fe) SHA1(d0440e4ef0fa7bbab2ea3d6f9f3f1d4513aec8c0), ROM_BIOS(0)) +ROM_END + +const tiny_rom_entry *arc_midi2_emr_device::device_rom_region() const +{ + return ROM_NAME( midi2 ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_midi2_emr_device::device_add_mconfig(machine_config &config) +{ + scn2681_device &uart(SCN2681(config, "uart", DERIVED_CLOCK(1, 4))); // TODO: confirm device + uart.irq_cb().set([this](int state) { set_pirq(state); }); + uart.a_tx_cb().set("mdout_a", FUNC(midi_port_device::write_txd)); + uart.b_tx_cb().set("mdout_b", FUNC(midi_port_device::write_txd)); + + midi_port_device &mdin1(MIDI_PORT(config, "mdin_a", midiin_slot, "midiin")); + mdin1.rxd_handler().set("uart", FUNC(scn2681_device::rx_a_w)); + midi_port_device &mdin2(MIDI_PORT(config, "mdin_b", midiin_slot, "midiin")); + mdin2.rxd_handler().set("uart", FUNC(scn2681_device::rx_b_w)); + + MIDI_PORT(config, "mdout_a", midiout_slot, "midiout"); + MIDI_PORT(config, "mdout_b", midiout_slot, "midiout"); +} + +void arc_midi4_emr_device::device_add_mconfig(machine_config &config) +{ + INPUT_MERGER_ANY_HIGH(config, "irqs").output_handler().set([this](int state) { set_pirq(state); }); + + scn2681_device &uart1(SCN2681(config, "uart1", 3.6864_MHz_XTAL)); + uart1.irq_cb().set("irqs", FUNC(input_merger_device::in_w<0>)); + uart1.a_tx_cb().set("mdout_a", FUNC(midi_port_device::write_txd)); + uart1.b_tx_cb().set("mdout_b", FUNC(midi_port_device::write_txd)); + + midi_port_device &mdin1(MIDI_PORT(config, "mdin_a", midiin_slot, "midiin")); + mdin1.rxd_handler().set("uart1", FUNC(scn2681_device::rx_a_w)); + midi_port_device &mdin2(MIDI_PORT(config, "mdin_b", midiin_slot, "midiin")); + mdin2.rxd_handler().set("uart1", FUNC(scn2681_device::rx_b_w)); + + MIDI_PORT(config, "mdout_a", midiout_slot, "midiout"); + MIDI_PORT(config, "mdout_b", midiout_slot, "midiout"); + + scn2681_device &uart2(SCN2681(config, "uart2", 3.6864_MHz_XTAL)); + uart2.irq_cb().set("irqs", FUNC(input_merger_device::in_w<1>)); + uart2.a_tx_cb().set("mdout_c", FUNC(midi_port_device::write_txd)); + uart2.b_tx_cb().set("mdout_d", FUNC(midi_port_device::write_txd)); + + midi_port_device &mdin3(MIDI_PORT(config, "mdin_c", midiin_slot, "midiin")); + mdin3.rxd_handler().set("uart2", FUNC(scn2681_device::rx_a_w)); + midi_port_device &mdin4(MIDI_PORT(config, "mdin_d", midiin_slot, "midiin")); + mdin4.rxd_handler().set("uart2", FUNC(scn2681_device::rx_b_w)); + + MIDI_PORT(config, "mdout_c", midiout_slot, "midiout"); + MIDI_PORT(config, "mdout_d", midiout_slot, "midiout"); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_midi_emr_device - constructor +//------------------------------------------------- + +arc_midi2_emr_device::arc_midi2_emr_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_MIDI2_EMR, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) + , m_podule_rom(*this, "podule_rom") + , m_rom_page(0) +{ +} + +arc_midi4_emr_device::arc_midi4_emr_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, ARC_MIDI4_EMR, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void arc_midi2_emr_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + +void arc_midi4_emr_device::device_start() +{ +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_midi2_emr_device::device_reset() +{ + m_rom_page = 0x00; +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_MIDI2_EMR, device_archimedes_podule_interface, arc_midi2_emr_device, "arc_midi2", "EMR MIDI 2 Interface") +DEFINE_DEVICE_TYPE_PRIVATE(ARC_MIDI4_EMR, device_archimedes_podule_interface, arc_midi4_emr_device, "arc_midi4", "EMR MIDI 4 Interface") |