diff options
Diffstat (limited to 'src/devices/bus/archimedes/podule/io.cpp')
-rw-r--r-- | src/devices/bus/archimedes/podule/io.cpp | 446 |
1 files changed, 446 insertions, 0 deletions
diff --git a/src/devices/bus/archimedes/podule/io.cpp b/src/devices/bus/archimedes/podule/io.cpp new file mode 100644 index 00000000000..1636079dc7e --- /dev/null +++ b/src/devices/bus/archimedes/podule/io.cpp @@ -0,0 +1,446 @@ +// license:BSD-3-Clause +// copyright-holders:Nigel Barnes +/********************************************************************** + + Acorn AKA10 BBC I/O Podule + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Acorn_AKA10_IO.html + + Acorn AKA12 User Port/Midi Upgrade + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Acorn_AKA12_MIDI.html + + Acorn AKA15 Midi and BBC I/O Podule + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Acorn_AKA15_MIDI.html + + Acorn AKA16 Midi Podule + http://chrisacorns.computinghistory.org.uk/32bit_UpgradesA2G/Acorn_AKA16_MIDI.html + + TODO: + - interrupts are optional, and are enabled with links. + +**********************************************************************/ + +#include "emu.h" +#include "io.h" +#include "machine/6522via.h" +#include "machine/6850acia.h" +#include "machine/clock.h" +#include "machine/input_merger.h" +#include "machine/mc68681.h" +#include "machine/upd7002.h" +#include "bus/bbc/1mhzbus/1mhzbus.h" +#include "bus/bbc/analogue/analogue.h" +#include "bus/bbc/userport/userport.h" +#include "bus/midi/midi.h" + + +namespace { + +// ======================> arc_io_aka_device + +class arc_io_aka_device : + public device_t, + public device_archimedes_podule_interface +{ +protected: + arc_io_aka_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock); + + // device-level overrides + virtual void device_start() override; + virtual void device_reset() override; + + void add_1mhzbus(machine_config &config); + void add_analogue(machine_config &config); + void add_midi_6850(machine_config &config); + void add_midi_2691(machine_config &config); + void add_userport(machine_config &config); + + required_memory_region m_podule_rom; + required_device<input_merger_device> m_irqs; + optional_device<bbc_analogue_slot_device> m_analog; + + u8 m_rom_page; + + u8 pa_r(); + int get_analogue_input(int channel_number); + void upd7002_eoc(int state); + + int m_irq_en; +}; + + +// ======================> arc_bbcio_aka10_device + +class arc_bbcio_aka10_device : public arc_io_aka_device +{ +public: + // construction/destruction + arc_bbcio_aka10_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // 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; + virtual void memc_map(address_map &map) override; +}; + + +// ======================> arc_upmidi_aka12_device + +class arc_upmidi_aka12_device : public arc_io_aka_device +{ +public: + // construction/destruction + arc_upmidi_aka12_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // 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; +}; + + +// ======================> arc_iomidi_aka15_device + +class arc_iomidi_aka15_device : public arc_io_aka_device +{ +public: + // construction/destruction + arc_iomidi_aka15_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // 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; + virtual void memc_map(address_map &map) override; +}; + + +// ======================> arc_midi_aka16_device + +class arc_midi_aka16_device : public arc_io_aka_device +{ +public: + // construction/destruction + arc_midi_aka16_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); + +protected: + // 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; +}; + + +void arc_bbcio_aka10_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) & 0x3800)]; })).umask32(0x000000ff); + map(0x2000, 0x203f).rw("via", FUNC(via6522_device::read), FUNC(via6522_device::write)).umask32(0x000000ff); +} + +void arc_bbcio_aka10_device::memc_map(address_map &map) +{ + map(0x0000, 0x03ff).rw("1mhzbus", FUNC(bbc_1mhzbus_slot_device::fred_r), FUNC(bbc_1mhzbus_slot_device::fred_w)).umask32(0x000000ff); + map(0x0800, 0x0bff).rw("1mhzbus", FUNC(bbc_1mhzbus_slot_device::jim_r), FUNC(bbc_1mhzbus_slot_device::jim_w)).umask32(0x000000ff); + map(0x1000, 0x100f).rw("upd7002", FUNC(upd7002_device::read), FUNC(upd7002_device::write)).umask32(0x000000ff); +} + + +void arc_upmidi_aka12_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) & 0x3800)]; })).umask32(0x000000ff); + map(0x2000, 0x203f).rw("via", FUNC(via6522_device::read), FUNC(via6522_device::write)).umask32(0x000000ff); + map(0x3000, 0x301f).rw("uart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0x000000ff); +} + + +void arc_iomidi_aka15_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) & 0x3800)]; })).umask32(0x000000ff); + map(0x2000, 0x203f).rw("via", FUNC(via6522_device::read), FUNC(via6522_device::write)).umask32(0x000000ff); +} + +void arc_iomidi_aka15_device::memc_map(address_map &map) +{ + map(0x0000, 0x03ff).rw("1mhzbus", FUNC(bbc_1mhzbus_slot_device::fred_r), FUNC(bbc_1mhzbus_slot_device::fred_w)).umask32(0x000000ff); + map(0x0800, 0x0bff).rw("1mhzbus", FUNC(bbc_1mhzbus_slot_device::jim_r), FUNC(bbc_1mhzbus_slot_device::jim_w)).umask32(0x000000ff); + map(0x1000, 0x100f).rw("upd7002", FUNC(upd7002_device::read), FUNC(upd7002_device::write)).umask32(0x000000ff); + map(0x1800, 0x1807).rw("acia", FUNC(acia6850_device::read), FUNC(acia6850_device::write)).umask32(0x000000ff); +} + + +void arc_midi_aka16_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) & 0x3800)]; })).umask32(0x000000ff); + map(0x2000, 0x2000).lw8(NAME([this](u8 data) { m_rom_page = data; })); + map(0x3000, 0x301f).rw("uart", FUNC(scn2681_device::read), FUNC(scn2681_device::write)).umask32(0x000000ff); +} + + +//------------------------------------------------- +// ROM( aka10 ) +//------------------------------------------------- + +ROM_START( aka10 ) + ROM_REGION(0x4000, "podule_rom", 0) + ROM_SYSTEM_BIOS(0, "3", "Third release 22-Sep-89") + ROMX_LOAD("0276,202-03_io.bin", 0x0000, 0x4000, CRC(f4df6587) SHA1(2c0402cd754ebeb1e1fe750dc8a88a2acc1ea06d), ROM_BIOS(0)) + ROM_SYSTEM_BIOS(1, "2", "Second release 18-Dec-87") + ROMX_LOAD("0276,202-02_io.bin", 0x0000, 0x4000, CRC(d548b4dc) SHA1(22e1f1a0adf896f08b1e1d487aa24141296aa127), ROM_BIOS(1)) + ROM_SYSTEM_BIOS(2, "1", "Release 1.04 07-Aug-87") + ROMX_LOAD("0276,202-01_io.bin", 0x0000, 0x4000, CRC(fc1d61d0) SHA1(4c3de606de594c8f6ed236ffa19374c76e307226), ROM_BIOS(2)) +ROM_END + +ROM_START( aka12 ) + ROM_REGION(0x4000, "podule_rom", 0) + ROM_SYSTEM_BIOS(0, "2", "Second release 31-Aug-89") + ROMX_LOAD("0280,320-02_a3000_upm.bin", 0x0000, 0x4000, CRC(3f0f5794) SHA1(4e0e2cf2586c8f2fc1431458f677a45164749ab2), ROM_BIOS(0)) +ROM_END + +ROM_START( aka15 ) + ROM_REGION(0x4000, "podule_rom", 0) + ROM_SYSTEM_BIOS(0, "1", "Initial release 18-Dec-87") + ROMX_LOAD("0276,211-01_iomidi.bin", 0x0000, 0x4000, CRC(e85a77c5) SHA1(32e990c435b439d4a169e85a009fc6a864121c3f), ROM_BIOS(0)) +ROM_END + +ROM_START( aka16 ) + ROM_REGION(0x4000, "podule_rom", 0) + ROM_SYSTEM_BIOS(0, "2", "Second release 31-Aug-89") + ROMX_LOAD("0276,281-02_midi-pod_v3.03.rom", 0x0000, 0x4000, CRC(1833afdd) SHA1(beb86b74bf6a9c9caf10f57e326cc539ffe9624b), ROM_BIOS(0)) + ROM_SYSTEM_BIOS(1, "1", "Test version 11-Jan-88") + ROMX_LOAD("0276,281-01_midi-pod.rom", 0x0000, 0x4000, CRC(c09ae053) SHA1(e0e63e0b44d3eba805aea9d2103ab35ea93e8c1c), ROM_BIOS(1)) + ROM_SYSTEM_BIOS(2, "m", "Millipede Mod 8/1/98") // modified by Millipede to fix clash with their cards + ROMX_LOAD("millipede_mod_8-1-98.rom", 0x0000, 0x4000, CRC(729b9d61) SHA1(f6ad28d3cf9a14af3c103f9fae74795f539f24e8), ROM_BIOS(2)) +ROM_END + +const tiny_rom_entry *arc_bbcio_aka10_device::device_rom_region() const +{ + return ROM_NAME( aka10 ); +} + +const tiny_rom_entry *arc_upmidi_aka12_device::device_rom_region() const +{ + return ROM_NAME( aka12 ); +} + +const tiny_rom_entry *arc_iomidi_aka15_device::device_rom_region() const +{ + return ROM_NAME( aka15 ); +} + +const tiny_rom_entry *arc_midi_aka16_device::device_rom_region() const +{ + return ROM_NAME( aka16 ); +} + + +//------------------------------------------------- +// device_add_mconfig - add device configuration +//------------------------------------------------- + +void arc_io_aka_device::add_userport(machine_config &config) +{ + via6522_device &via(MOS6522(config, "via", DERIVED_CLOCK(1, 4))); + via.irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<0>)); + via.readpa_handler().set(FUNC(arc_io_aka_device::pa_r)); + via.writepa_handler().set([this](u8 data) { m_rom_page = data; }); + via.readpb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_r)); + via.writepb_handler().set("userport", FUNC(bbc_userport_slot_device::pb_w)); + via.ca2_handler().set([this](int state) { m_irq_en = !state; }); // AKA10/15 only + via.cb1_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb1)); + via.cb2_handler().set("userport", FUNC(bbc_userport_slot_device::write_cb2)); + + bbc_userport_slot_device &userport(BBC_USERPORT_SLOT(config, "userport", bbc_userport_devices, nullptr)); + userport.cb1_handler().set("via", FUNC(via6522_device::write_cb1)); + userport.cb2_handler().set("via", FUNC(via6522_device::write_cb2)); +} + +void arc_io_aka_device::add_analogue(machine_config &config) +{ + upd7002_device &upd7002(UPD7002(config, "upd7002", DERIVED_CLOCK(1, 4))); + upd7002.set_get_analogue_callback(FUNC(arc_io_aka_device::get_analogue_input)); + upd7002.set_eoc_callback(FUNC(arc_io_aka_device::upd7002_eoc)); + + BBC_ANALOGUE_SLOT(config, m_analog, bbc_analogue_devices, nullptr); + m_analog->lpstb_handler().set("via", FUNC(via6522_device::write_ca1)); +} + +void arc_io_aka_device::add_1mhzbus(machine_config &config) +{ + bbc_1mhzbus_slot_device &bus(BBC_1MHZBUS_SLOT(config, "1mhzbus", DERIVED_CLOCK(1, 8), bbcm_1mhzbus_devices, nullptr)); + bus.irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<2>)); + bus.nmi_handler().set([this](int state) { set_pfiq(state); }); +} + +void arc_io_aka_device::add_midi_6850(machine_config &config) +{ + acia6850_device &acia(ACIA6850(config, "acia", 0)); + acia.irq_handler().set(m_irqs, FUNC(input_merger_device::in_w<3>)); + acia.txd_handler().set("mdout", FUNC(midi_port_device::write_txd)); + + clock_device &acia_clock(CLOCK(config, "acia_clock", DERIVED_CLOCK(1, 4))); + acia_clock.signal_handler().set("acia", FUNC(acia6850_device::write_txc)); + acia_clock.signal_handler().append("acia", FUNC(acia6850_device::write_rxc)); + + midiout_slot(MIDI_PORT(config, "mdout")); + + auto &mdin(MIDI_PORT(config, "mdin")); + midiin_slot(mdin); + mdin.rxd_handler().set("acia", FUNC(acia6850_device::write_rxd)); +} + +void arc_io_aka_device::add_midi_2691(machine_config &config) +{ + scn2681_device &uart(SCN2681(config, "uart", DERIVED_CLOCK(1, 4))); // SCC2691 + uart.irq_cb().set(m_irqs, FUNC(input_merger_device::in_w<3>)); + uart.a_tx_cb().set("mdout", FUNC(midi_port_device::write_txd)); + uart.a_tx_cb().append("mdthru", FUNC(midi_port_device::write_txd)); + + auto &mdin(MIDI_PORT(config, "mdin")); + midiin_slot(mdin); + mdin.rxd_handler().set("uart", FUNC(scn2681_device::rx_a_w)); + mdin.rxd_handler().append("mdthru", FUNC(midi_port_device::write_txd)); + + midiout_slot(MIDI_PORT(config, "mdthru")); + midiout_slot(MIDI_PORT(config, "mdout")); +} + + +void arc_bbcio_aka10_device::device_add_mconfig(machine_config &config) +{ + INPUT_MERGER_ANY_HIGH(config, "irqs").output_handler().set([this](int state) { set_pirq(m_irq_en && state); }); + add_userport(config); + add_1mhzbus(config); + add_analogue(config); +} + +void arc_upmidi_aka12_device::device_add_mconfig(machine_config &config) +{ + INPUT_MERGER_ANY_HIGH(config, "irqs").output_handler().set([this](int state) { set_pirq(state); }); + add_userport(config); + add_midi_2691(config); +} + +void arc_iomidi_aka15_device::device_add_mconfig(machine_config &config) +{ + INPUT_MERGER_ANY_HIGH(config, "irqs").output_handler().set([this](int state) { set_pirq(m_irq_en && state); }); + add_userport(config); + add_1mhzbus(config); + add_analogue(config); + add_midi_6850(config); +} + +void arc_midi_aka16_device::device_add_mconfig(machine_config &config) +{ + INPUT_MERGER_ANY_HIGH(config, "irqs").output_handler().set([this](int state) { set_pirq(state); }); + add_midi_2691(config); +} + + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// arc_io_aka_device - constructor +//------------------------------------------------- + +arc_io_aka_device::arc_io_aka_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock) + : device_t(mconfig, type, tag, owner, clock) + , device_archimedes_podule_interface(mconfig, *this) + , m_podule_rom(*this, "podule_rom") + , m_irqs(*this, "irqs") + , m_analog(*this, "analogue") + , m_rom_page(0) + , m_irq_en(0) +{ +} + +arc_bbcio_aka10_device::arc_bbcio_aka10_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : arc_io_aka_device(mconfig, ARC_BBCIO_AKA10, tag, owner, clock) +{ +} + +arc_upmidi_aka12_device::arc_upmidi_aka12_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : arc_io_aka_device(mconfig, ARC_UPMIDI_AKA12, tag, owner, clock) +{ +} + +arc_iomidi_aka15_device::arc_iomidi_aka15_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : arc_io_aka_device(mconfig, ARC_IOMIDI_AKA15, tag, owner, clock) +{ +} + +arc_midi_aka16_device::arc_midi_aka16_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) + : arc_io_aka_device(mconfig, ARC_MIDI_AKA16, tag, owner, clock) +{ +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void arc_io_aka_device::device_start() +{ + save_item(NAME(m_rom_page)); +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void arc_io_aka_device::device_reset() +{ + m_rom_page = 0x00; +} + + +//************************************************************************** +// IMPLEMENTATION +//************************************************************************** + +u8 arc_io_aka_device::pa_r() +{ + u8 data = 0xff; + + if (m_analog) + { + data = (m_analog->pb_r() << 2) | 0x3f; + } + + return data; +} + +int arc_io_aka_device::get_analogue_input(int channel_number) +{ + return (0xff - m_analog->ch_r(channel_number)) << 8; +} + +void arc_io_aka_device::upd7002_eoc(int state) +{ + m_irqs->in_w<1>(!state); +} + +} // anonymous namespace + + +//************************************************************************** +// DEVICE DEFINITIONS +//************************************************************************** + +DEFINE_DEVICE_TYPE_PRIVATE(ARC_BBCIO_AKA10, device_archimedes_podule_interface, arc_bbcio_aka10_device, "arc_bbcio_aka10", "Acorn AKA10 BBC I/O Podule") +DEFINE_DEVICE_TYPE_PRIVATE(ARC_UPMIDI_AKA12, device_archimedes_podule_interface, arc_upmidi_aka12_device, "arc_upmidi_aka12", "Acorn AKA12 User Port/MIDI Podule") +DEFINE_DEVICE_TYPE_PRIVATE(ARC_IOMIDI_AKA15, device_archimedes_podule_interface, arc_iomidi_aka15_device, "arc_iomidi_aka15", "Acorn AKA15 MIDI and BBC I/O Podule") +DEFINE_DEVICE_TYPE_PRIVATE(ARC_MIDI_AKA16, device_archimedes_podule_interface, arc_midi_aka16_device, "arc_midi_aka16", "Acorn AKA16 MIDI Podule") |