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https://github.com/holub/mame
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vis: add sound [Carl]
This commit is contained in:
cracyc
parent
d17b3c56b5
commit
7bd02aca23
@ -4,20 +4,207 @@
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#include "emu.h"
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#include "cpu/i86/i286.h"
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#include "machine/at.h"
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#include "sound/dac.h"
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#include "sound/262intf.h"
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#include "bus/isa/isa_cards.h"
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class vis_audio_device : public device_t,
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public device_isa16_card_interface
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{
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public:
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vis_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
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DECLARE_READ8_MEMBER(pcm_r);
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DECLARE_WRITE8_MEMBER(pcm_w);
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protected:
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virtual void device_start() override;
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virtual void device_reset() override;
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virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
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virtual void dack16_w(int line, UINT16 data) override { m_sample[m_samples++] = data; if(m_samples == 2) m_isa->drq7_w(CLEAR_LINE); }
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virtual machine_config_constructor device_mconfig_additions() const override;
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private:
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required_device<dac_device> m_dacr;
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required_device<dac_device> m_dacl;
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UINT16 m_count;
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UINT16 m_sample[2];
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UINT8 m_index[2]; // unknown indexed registers, volume?
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UINT8 m_data[2][16];
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UINT8 m_mode;
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UINT8 m_stat;
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int m_sample_byte;
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int m_samples;
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emu_timer *m_pcm;
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};
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const device_type VIS_AUDIO = &device_creator<vis_audio_device>;
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vis_audio_device::vis_audio_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock)
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: device_t(mconfig, VIS_AUDIO, "vis_pcm", tag, owner, clock, "vis_pcm", __FILE__),
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device_isa16_card_interface(mconfig, *this),
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m_dacr(*this, "dacr"),
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m_dacl(*this, "dacl")
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{
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}
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void vis_audio_device::device_start()
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{
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set_isa_device();
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m_isa->set_dma_channel(7, this, FALSE);
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m_isa->install_device(0x0220, 0x022f, read8_delegate(FUNC(vis_audio_device::pcm_r), this), write8_delegate(FUNC(vis_audio_device::pcm_w), this));
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m_isa->install_device(0x0388, 0x038b, read8_delegate(FUNC(ymf262_device::read), subdevice<ymf262_device>("ymf262")), write8_delegate(FUNC(ymf262_device::write), subdevice<ymf262_device>("ymf262")));
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m_pcm = timer_alloc();
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m_pcm->adjust(attotime::never);
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}
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void vis_audio_device::device_reset()
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{
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m_count = 0;
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m_sample_byte = 0;
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m_samples = 0;
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m_mode = 0;
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m_index[0] = m_index[1] = 0;
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m_stat = 0;
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}
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void vis_audio_device::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr)
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{
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switch(m_mode & 0x88)
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{
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case 0x80: // 8bit mono
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{
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UINT8 sample = m_sample[m_sample_byte >> 1] >> ((m_sample_byte & 1) * 8);
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m_dacl->write_unsigned8(sample);
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m_dacr->write_unsigned8(sample);
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m_sample_byte++;
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break;
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}
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case 0x00: // 8bit stereo
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m_dacl->write_unsigned8(m_sample[m_sample_byte >> 1] & 0xff);
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m_dacr->write_unsigned8(m_sample[m_sample_byte >> 1] >> 8);
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m_sample_byte += 2;
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break;
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case 0x88: // 16bit mono
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m_dacl->write((INT16)m_sample[m_sample_byte >> 1]);
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m_dacr->write((INT16)m_sample[m_sample_byte >> 1]);
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m_sample_byte += 2;
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break;
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case 0x08: // 16bit stereo
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m_dacl->write((INT16)m_sample[0]);
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m_dacr->write((INT16)m_sample[1]);
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m_sample_byte += 4;
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break;
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}
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if(m_sample_byte >= 4)
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{
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m_sample_byte = 0;
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m_samples = 0;
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if(m_count)
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m_isa->drq7_w(ASSERT_LINE);
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else
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{
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m_dacl->write(0);
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m_dacr->write(0);
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m_stat = 4;
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m_pcm->adjust(attotime::never);
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m_isa->irq7_w(ASSERT_LINE);
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}
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m_count--;
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}
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}
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static MACHINE_CONFIG_FRAGMENT( vis_pcm_config )
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MCFG_SPEAKER_STANDARD_STEREO("lspeaker", "rspeaker")
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MCFG_SOUND_ADD("ymf262", YMF262, XTAL_14_31818MHz)
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MCFG_SOUND_ROUTE(0, "lspeaker", 1.00)
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MCFG_SOUND_ROUTE(1, "rspeaker", 1.00)
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MCFG_SOUND_ROUTE(2, "lspeaker", 1.00)
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MCFG_SOUND_ROUTE(3, "rspeaker", 1.00)
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MCFG_SOUND_ADD("dacl", DAC, 0)
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MCFG_SOUND_ROUTE(ALL_OUTPUTS, "lspeaker", 1.00)
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MCFG_SOUND_ADD("dacr", DAC, 0)
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MCFG_SOUND_ROUTE(ALL_OUTPUTS, "rspeaker", 1.00)
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MACHINE_CONFIG_END
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machine_config_constructor vis_audio_device::device_mconfig_additions() const
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{
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return MACHINE_CONFIG_NAME( vis_pcm_config );
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}
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READ8_MEMBER(vis_audio_device::pcm_r)
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{
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switch(offset)
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{
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case 0x00:
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return m_mode;
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case 0x02:
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return m_data[0][m_index[0]];
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case 0x04:
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return m_data[1][m_index[1]];
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case 0x09:
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m_isa->irq7_w(CLEAR_LINE);
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return m_stat;
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case 0x0c:
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return m_count & 0xff;
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case 0x0e:
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return m_count >> 8;
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default:
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logerror("unknown pcm read %04x\n", offset);
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break;
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}
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return 0;
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}
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WRITE8_MEMBER(vis_audio_device::pcm_w)
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{
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switch(offset)
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{
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case 0x00:
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m_mode = data;
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break;
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case 0x02:
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m_data[0][m_index[0]] = data;
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break;
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case 0x03:
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m_index[0] = data;
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break;
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case 0x04:
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m_data[1][m_index[1]] = data;
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break;
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case 0x05:
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m_index[1] = data;
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break;
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case 0x0c:
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m_count = (m_count & 0xff00) | data;
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break;
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case 0x0e:
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m_count = (m_count & 0xff) | (data << 8);
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break;
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default:
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logerror("unknown pcm write %04x %02x\n", offset, data);
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break;
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}
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if((m_mode & 0x10) && m_count)
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{
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const int rates[] = {44100, 22050, 11025, 5512};
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m_samples = 0;
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m_sample_byte = 0;
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m_stat = 0;
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m_isa->drq7_w(ASSERT_LINE);
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attotime rate = attotime::from_hz(rates[(m_mode >> 5) & 3]);
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m_pcm->adjust(rate, 0, rate);
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}
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}
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class vis_state : public driver_device
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{
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public:
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vis_state(const machine_config &mconfig, device_type type, const char *tag)
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: driver_device(mconfig, type, tag),
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m_maincpu(*this, "maincpu"),
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m_mb(*this, "mb"),
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m_pic1(*this, "mb:pic8259_slave"),
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m_vga(*this, "vga")
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{ }
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required_device<cpu_device> m_maincpu;
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required_device<at_mb_device> m_mb;
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required_device<pic8259_device> m_pic1;
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required_device<vga_device> m_vga;
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@ -167,6 +354,10 @@ static ADDRESS_MAP_START( at16_io, AS_IO, 16, vis_state )
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AM_RANGE(0x03b0, 0x03df) AM_READWRITE8(vga_r, vga_w, 0xffff)
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ADDRESS_MAP_END
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static SLOT_INTERFACE_START(vis_cards)
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SLOT_INTERFACE("visaudio", VIS_AUDIO)
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SLOT_INTERFACE_END
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static MACHINE_CONFIG_START( vis, vis_state )
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/* basic machine hardware */
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MCFG_CPU_ADD("maincpu", I80286, XTAL_12MHz )
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@ -177,7 +368,8 @@ static MACHINE_CONFIG_START( vis, vis_state )
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MCFG_DEVICE_ADD("mb", AT_MB, 0)
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MCFG_ISA16_SLOT_ADD("mb:isabus","mcd", pc_isa16_cards, "mcd", true)
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MCFG_ISA16_SLOT_ADD("mb:isabus", "mcd", pc_isa16_cards, "mcd", true)
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MCFG_ISA16_SLOT_ADD("mb:isabus", "visaudio", vis_cards, "visaudio", true)
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MCFG_FRAGMENT_ADD(pcvideo_vga)
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MACHINE_CONFIG_END
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