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bus/spectrum: Added The Music Machine (MIDI I/O expansion). (#12842)
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,114 @@ | ||
| // license:BSD-3-Clause | ||
| // copyright-holders:Andrei I. Holub | ||
| /* | ||
| * The Music Machine - MIDI and sampling expansion | ||
| * by Ram Electronics Ltd | ||
| */ | ||
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| #include "emu.h" | ||
| #include "musicmachine.h" | ||
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| #include "bus/midi/midi.h" | ||
| #include "machine/clock.h" | ||
| #include "speaker.h" | ||
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| //************************************************************************** | ||
| // DEVICE DEFINITIONS | ||
| //************************************************************************** | ||
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| DEFINE_DEVICE_TYPE(SPECTRUM_MUSICMACHINE, spectrum_musicmachine_device, "spectrummusic", "The Music Machine (ZX)") | ||
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| void spectrum_musicmachine_device::device_add_mconfig(machine_config &config) | ||
| { | ||
| ACIA6850(config, m_acia).txd_handler().set("mdout", FUNC(midi_port_device::write_txd)); | ||
| m_acia->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_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(spectrum_musicmachine_device::write_acia_clock)); | ||
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| SPEAKER(config, "speaker").front_center(); | ||
| ZN429E(config, m_dac, 0).add_route(ALL_OUTPUTS, "speaker", 0.2); | ||
| } | ||
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| //************************************************************************** | ||
| // LIVE DEVICE | ||
| //************************************************************************** | ||
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| spectrum_musicmachine_device::spectrum_musicmachine_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : | ||
| device_t(mconfig, SPECTRUM_MUSICMACHINE, tag, owner, clock) | ||
| , device_spectrum_expansion_interface(mconfig, *this) | ||
| , m_acia(*this,"acia") | ||
| , m_dac(*this,"dac") | ||
| { | ||
| } | ||
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| //------------------------------------------------- | ||
| // device_start - device-specific startup | ||
| //------------------------------------------------- | ||
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| void spectrum_musicmachine_device::device_start() | ||
| { | ||
| } | ||
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| //------------------------------------------------- | ||
| // device_reset - device-specific reset | ||
| //------------------------------------------------- | ||
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| void spectrum_musicmachine_device::device_reset() | ||
| { | ||
| m_irq_select = false; | ||
| } | ||
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| void spectrum_musicmachine_device::write_acia_clock(u8 data) | ||
| { | ||
| m_acia->write_txc(data); | ||
| m_acia->write_rxc(data); | ||
| } | ||
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| u8 spectrum_musicmachine_device::iorq_r(offs_t offset) | ||
| { | ||
| u8 data = offset & 1 ? m_slot->fb_r() : 0xff; | ||
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| switch (offset & 0xff) | ||
| { | ||
| case 0x7f: | ||
| if (offset == 0xfc7f) | ||
| data = m_acia->status_r(); | ||
| else | ||
| data = m_acia->data_r(); | ||
| break; | ||
| case 0xbf: | ||
| // TODO ADC_READ | ||
| break; | ||
| case 0xdf: | ||
| // TODO Strobe: ADC_START | ||
| break; | ||
| } | ||
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| return data; | ||
| } | ||
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| void spectrum_musicmachine_device::iorq_w(offs_t offset, u8 data) | ||
| { | ||
| switch (offset & 0xff) | ||
| { | ||
| case 0x5f: | ||
| m_irq_select = data & 1; | ||
| break; | ||
| case 0x7f: | ||
| if (offset == 0xfc7f) | ||
| m_acia->control_w(data); | ||
| else | ||
| m_acia->data_w(data); | ||
| break; | ||
| case 0x9f: | ||
| m_dac->write(data); | ||
| break; | ||
| case 0xdf: | ||
| // TODO Strobe: ADC_START | ||
| break; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| // license:BSD-3-Clause | ||
| // copyright-holders:Barry Rodewald | ||
| /* | ||
| * The Music Machine - MIDI and sampling expansion | ||
| * by Ram Electronics | ||
| * | ||
| * Contains a 6850 AICA, Ferranti ZN429E8 DAC and ZN449 ADC | ||
| */ | ||
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| #ifndef MAME_BUS_SPECTRUM_MUSICMACHINE_H | ||
| #define MAME_BUS_SPECTRUM_MUSICMACHINE_H | ||
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| #pragma once | ||
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| #include "exp.h" | ||
| #include "machine/6850acia.h" | ||
| #include "sound/dac.h" | ||
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| class spectrum_musicmachine_device : public device_t | ||
| , public device_spectrum_expansion_interface | ||
| { | ||
| public: | ||
| // construction/destruction | ||
| spectrum_musicmachine_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock); | ||
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| void write_acia_clock(u8 data); | ||
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| protected: | ||
| // device-level overrides | ||
| virtual void device_start() override ATTR_COLD; | ||
| virtual void device_reset() override ATTR_COLD; | ||
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| // optional information overrides | ||
| virtual void device_add_mconfig(machine_config &config) override ATTR_COLD; | ||
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| virtual u8 iorq_r(offs_t offset) override; | ||
| virtual void iorq_w(offs_t offset, u8 data) override; | ||
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| private: | ||
| required_device<acia6850_device> m_acia; | ||
| required_device<dac_byte_interface> m_dac; | ||
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| bool m_irq_select; | ||
| }; | ||
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| // device type definition | ||
| DECLARE_DEVICE_TYPE(SPECTRUM_MUSICMACHINE, spectrum_musicmachine_device) | ||
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| #endif // MAME_BUS_SPECTRUM_MUSICMACHINE_H |