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https://github.com/holub/mame
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uPD934G: Preliminary emulation
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Dirk Best
parent
61f1bf7477
commit
3ffd6b839f
@ -1459,3 +1459,15 @@ if (SOUNDS["LC7535"]~=null) then
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MAME_DIR .. "src/devices/sound/lc7535.h",
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}
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end
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---------------------------------------------------
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-- NEC uPD934G
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--@src/devices/sound/upd934g.h,SOUNDS["UPD934G"] = true
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---------------------------------------------------
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if (SOUNDS["UPD934G"]~=null) then
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files {
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MAME_DIR .. "src/devices/sound/upd934g.cpp",
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MAME_DIR .. "src/devices/sound/upd934g.h",
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}
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end
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@ -268,6 +268,7 @@ SOUNDS["TA7630"] = true
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SOUNDS["MM5837"] = true
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--SOUNDS["DAVE"] = true
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SOUNDS["LC7535"] = true
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--SOUNDS["UPD934G"] = true
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--------------------------------------------------
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-- specify available video cores
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@ -270,6 +270,7 @@ SOUNDS["MEA8000"] = true
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--SOUNDS["MM5837"] = true
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SOUNDS["DAVE"] = true
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--SOUNDS["LC7535"] = true
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SOUNDS["UPD934G"] = true
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--------------------------------------------------
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-- specify available video cores
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161
src/devices/sound/upd934g.cpp
Normal file
161
src/devices/sound/upd934g.cpp
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@ -0,0 +1,161 @@
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// license: BSD-3-Clause
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// copyright-holders: Dirk Best
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/***************************************************************************
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NEC μPD934G
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Percussion Generator
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TODO:
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- Play MUTED and ACCENTED
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- T1 input
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- 8 channels?
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***************************************************************************/
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#include "emu.h"
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#include "upd934g.h"
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//**************************************************************************
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// DEVICE DEFINITIONS
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//**************************************************************************
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DEFINE_DEVICE_TYPE(UPD934G, upd934g_device, "upd934g", "NEC uPD934G")
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// upd934g_device - constructor
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//-------------------------------------------------
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upd934g_device::upd934g_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) :
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device_t(mconfig, UPD934G, tag, owner, clock),
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device_sound_interface(mconfig, *this),
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m_data_cb(*this),
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m_stream(nullptr),
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m_sample(0),
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m_ready(false)
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void upd934g_device::device_start()
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{
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// create sound stream
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m_stream = machine().sound().stream_alloc(*this, 0, 4, 20000);
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// resolve callbacks
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m_data_cb.resolve_safe(0);
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// register for save states
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save_pointer(NAME(m_addr), 16);
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for (unsigned i = 0; i < 4; i++)
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{
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save_item(NAME(m_channel[i].pos), i);
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save_item(NAME(m_channel[i].playing), i);
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save_item(NAME(m_channel[i].volume), i);
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}
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save_item(NAME(m_sample));
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save_item(NAME(m_ready));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void upd934g_device::device_reset()
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{
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m_ready = false;
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for (unsigned i = 0; i < 4; i++)
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m_channel[i].playing = -1;
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}
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//-------------------------------------------------
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// sound_stream_update - handle update requests for
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// our sound stream
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//-------------------------------------------------
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void upd934g_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples)
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{
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for (unsigned ch = 0; ch < 4; ch++)
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{
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std::fill(&outputs[ch][0], &outputs[ch][samples], 0);
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if (m_ready && m_channel[ch].playing != -1)
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{
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uint16_t end = m_addr[m_channel[ch].playing + 1] - 1;
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for (unsigned i = 0; i < samples; i++)
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{
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int8_t raw = static_cast<int8_t>(m_data_cb(m_channel[ch].pos));
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outputs[ch][i] = raw * (m_channel[ch].volume + 1) * 64;
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if (++m_channel[ch].pos >= end)
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{
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m_channel[ch].playing = -1;
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break;
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}
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}
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}
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}
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}
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//**************************************************************************
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// INTERFACE
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//**************************************************************************
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WRITE8_MEMBER( upd934g_device::write )
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{
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switch (offset)
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{
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case 0:
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// format of data written here is:
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// 76------ command
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// --5432-- sample number
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// ------10 volume?
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m_sample = (data >> 2) & 0x0f;
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switch (data >> 6)
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{
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case 0:
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logerror("CMD STORE ADDRESS sample %x\n", m_sample);
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break;
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case 1:
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logerror("CMD PLAY sample %x (channel %d)\n", m_sample, m_sample >> 1);
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if (m_sample < 8)
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{
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m_channel[m_sample >> 1].pos = m_addr[m_sample];
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m_channel[m_sample >> 1].playing = m_sample;
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m_channel[m_sample >> 1].volume = data & 0x03;
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}
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break;
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case 2:
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logerror("CMD PLAY MUTED sample %x (channel %d)\n", m_sample, m_sample >> 1);
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break;
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case 3:
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logerror("CMD PLAY ACCENTED sample %x (channel %d)\n", m_sample, m_sample >> 1);
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break;
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}
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break;
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case 1:
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m_addr[m_sample] = (m_addr[m_sample] & 0xff00) | (data << 0);
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break;
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case 2:
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m_addr[m_sample] = (m_addr[m_sample] & 0x00ff) | (data << 8);
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logerror(" sample %x address = %04x\n", m_sample, m_addr[m_sample]);
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break;
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case 3:
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m_ready = true;
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break;
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}
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}
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70
src/devices/sound/upd934g.h
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70
src/devices/sound/upd934g.h
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@ -0,0 +1,70 @@
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// license: BSD-3-Clause
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// copyright-holders: Dirk Best
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/***************************************************************************
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NEC μPD934G
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Percussion Generator
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***************************************************************************/
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#ifndef MAME_SOUND_UPD934G_H
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#define MAME_SOUND_UPD934G_H
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#pragma once
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//**************************************************************************
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// INTERFACE CONFIGURATION MACROS
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//**************************************************************************
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#define MCFG_UPD934G_DATA_CB(_devcb) \
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devcb = &downcast<upd934g_device &>(*device).set_data_callback(DEVCB_##_devcb);
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class upd934g_device : public device_t, public device_sound_interface
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{
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public:
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static constexpr feature_type imperfect_features() { return feature::SOUND; }
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// construction/destruction
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upd934g_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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// configuration
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template <class Object> devcb_base &set_data_callback(Object &&cb) { return m_data_cb.set_callback(std::forward<Object>(cb)); }
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DECLARE_WRITE8_MEMBER(write);
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protected:
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) override;
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private:
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devcb_read8 m_data_cb;
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sound_stream *m_stream;
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uint16_t m_addr[16];
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struct
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{
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uint16_t pos;
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int playing;
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int volume;
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}
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m_channel[4];
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int m_sample;
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bool m_ready;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(UPD934G, upd934g_device)
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#endif // MAME_SOUND_UPD934G_H
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