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// license:BSD-3-Clause
// copyright-holders:R. Belmont
/***************************************************************************
awacs.c
AWACS/Singer style 16-bit audio I/O for '040 and PowerPC Macs
Emulation by R. Belmont
***************************************************************************/
#include "emu.h"
#include "awacs.h"
// device type definition
DEFINE_DEVICE_TYPE(AWACS, awacs_device, "awacs", "AWACS")
const u8 awacs_device::divider[4] = { 16, 12, 8, 16 };
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// awacs_device - constructor
//-------------------------------------------------
awacs_device::awacs_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, AWACS, tag, owner, clock)
, device_sound_interface(mconfig, *this)
, m_irq_out_cb(*this)
, m_irq_in_cb(*this)
, m_output_cb(*this)
, m_input_cb(*this)
, m_input_port_cb(*this)
, m_output_port_cb(*this)
, m_stream(nullptr)
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void awacs_device::device_start()
{
// create the stream
m_stream = stream_alloc(0, 2, clock()/64/divider[0], STREAM_SYNCHRONOUS);
m_last_sample = attotime::zero;
m_irq_out_cb.resolve_safe();
m_irq_in_cb.resolve_safe();
m_output_cb.resolve_safe(0);
m_input_cb.resolve_safe();
m_input_port_cb.resolve_safe(0);
m_output_port_cb.resolve_safe();
save_item(NAME(m_extend));
save_item(NAME(m_ext_command));
save_item(NAME(m_ext_address));
save_item(NAME(m_ext_data));
save_item(NAME(m_codec0));
save_item(NAME(m_codec1));
save_item(NAME(m_codec2));
save_item(NAME(m_ctrl0));
save_item(NAME(m_ctrl1));
save_item(NAME(m_out_irq));
save_item(NAME(m_in_irq));
save_item(NAME(m_output_buffer));
save_item(NAME(m_input_buffer));
save_item(NAME(m_phase));
save_item(NAME(m_buffer_size));
}
//-------------------------------------------------
// device_reset - device-specific reset
//-------------------------------------------------
void awacs_device::device_reset()
{
m_extend = false;
m_ext_command = false;
m_ext_address = 0;
m_ext_data = 0;
m_codec0 = 0;
m_codec1 = 0;
m_codec2 = 0;
m_ctrl0 = 0;
m_ctrl1 = 0;
m_out_irq = 0;
m_in_irq = 0;
m_output_buffer = false;
m_input_buffer = false;
m_phase = 0;
m_buffer_size = 0;
m_irq_out_cb(false);
m_irq_in_cb(false);
m_stream->set_sample_rate(clock()/64/divider[(m_ctrl0 >> 1) & 3]);
}
//-------------------------------------------------
// sound_stream_update - handle update requests for
// our sound stream
//-------------------------------------------------
void awacs_device::sound_stream_update(sound_stream &stream, std::vector<read_stream_view> const &inputs, std::vector<write_stream_view> &outputs)
{
m_last_sample = machine().time();
if(m_phase == 0) {
m_active = 0;
if(m_ctrl0 & 1)
m_active |= ACTIVE_OUT;
if(m_ctrl1 & 0x80)
m_active |= ACTIVE_IN;
}
if(m_active & ACTIVE_OUT) {
u32 data = m_output_cb(m_phase | (m_output_buffer ? 0x10000 : 0));
s16 left = data >> 16;
s16 right = data;
outputs[0].put_int(0, left, 32768);
outputs[1].put_int(0, right, 32768);
} else {
m_output_buffer = false;
outputs[0].put_int(0, 0, 32768);
outputs[1].put_int(0, 0, 32768);
}
if(m_active & ACTIVE_IN)
m_input_cb(m_phase | (m_input_buffer ? 0x10000 : 0), 0);
else
m_input_buffer = false;
m_phase = (m_phase + 1) & 0xfff;
if(m_phase >= m_buffer_size) {
m_phase = 0;
if(m_active & ACTIVE_OUT) {
if(m_output_buffer) {
m_output_buffer = false;
if(m_out_irq & 0x40)
m_out_irq |= 0x20;
else
m_out_irq |= 0x40;
} else {
m_output_buffer = true;
if(m_out_irq & 0x80)
m_out_irq |= 0x20;
else
m_out_irq |= 0x80;
}
}
if(m_active & ACTIVE_IN) {
if(m_input_buffer) {
m_input_buffer = false;
if(m_in_irq & 0x40)
m_in_irq |= 0x20;
else
m_in_irq |= 0x40;
} else {
m_input_buffer = true;
if(m_in_irq & 0x80)
m_in_irq |= 0x20;
else
m_in_irq |= 0x80;
}
}
update_irq();
}
}
void awacs_device::update_irq()
{
m_irq_out_cb(((m_out_irq >> 4) & m_out_irq) != 0);
m_irq_in_cb(((m_in_irq >> 4) & m_in_irq) != 0);
}
//-------------------------------------------------
// read - read from the chip's registers
//-------------------------------------------------
uint8_t awacs_device::read(offs_t offset)
{
switch(offset) {
case 0x00:
if(m_extend)
return 0x80 | (m_ext_command ? 0x40 : 0x00) | (m_ext_address >> 4);
else
return m_codec0;
case 0x01:
if(m_extend)
return ((m_ext_address & 0xf) << 4) | ((m_ext_data & 0xf00) >> 8);
else
return m_codec1;
case 0x02:
if(m_extend)
return m_ext_data & 0x0ff;
else
return m_codec2;
case 0x06: return m_input_port_cb() & 0xf;
case 0x0c: {
u64 cycles = (machine().time() - m_last_sample).as_ticks(clock())/divider[(m_ctrl0 >> 1) & 3];
if(cycles > 63)
cycles = 63;
return cycles | ((m_phase & 3) << 6);
}
case 0x0d: return m_phase >> 2;
case 0x0e: return m_phase >> 10;
case 0x10: return m_ctrl0;
case 0x11: return m_ctrl1;
case 0x14: return m_in_irq;
case 0x18: return m_out_irq;
default:
logerror("reg_r %02x\n", offset);
return 0;
}
}
//-------------------------------------------------
// write - write to the chip's registers and internal RAM
//-------------------------------------------------
void awacs_device::write(offs_t offset, uint8_t data)
{
switch (offset) {
case 0x00:
m_extend = data & 0x80;
if(m_extend) {
m_ext_command = data & 0x40;
m_ext_address = (m_ext_address & 0xf) | ((data & 0x1f) << 4);
logerror("extended command=%d adr=%03x data=%03x\n", m_ext_command, m_ext_address, m_ext_data);
} else {
m_codec0 = data & 0x7f;
logerror("codec mute=%s iml=%x imr=%x gain_l=%x\n",
m_codec0 & 0x40 ? "on" : "off",
m_codec0 & 0x20 ? "on" : "off",
m_codec0 & 0x10 ? "on" : "off",
m_codec0 & 0xf);
}
break;
case 0x01:
if(m_extend) {
m_ext_address = (m_ext_address & 0x3f0) | ((data & 0xf0) >> 4);
m_ext_data = (m_ext_data & 0x0ff) | ((data & 0xf) << 8);
logerror("extended command=%d adr=%03x data=%03x\n", m_ext_command, m_ext_address, m_ext_data);
} else {
m_codec1 = data;
logerror("codec gain_r=%x att_l=%x\n",
(m_codec1 & 0xf0) >> 4,
m_codec1 & 0xf);
}
break;
case 0x02:
if(m_extend) {
m_ext_data = (m_ext_data & 0xf00) | data;
logerror("extended command=%d adr=%03x data=%03x\n", m_ext_command, m_ext_address, m_ext_data);
} else {
m_codec2 = data;
m_output_port_cb(data & 0xf);
logerror("codec att_r=%x output_port=%x\n",
(m_codec2 & 0xf0) >> 4,
m_codec2 & 0xf);
}
break;
case 0x08:
m_buffer_size = (m_buffer_size & 0xfc) | ((data & 7) << 8);
logerror("buffer size %03x\n", m_buffer_size);
break;
case 0x09:
m_buffer_size = (m_buffer_size & 0x700) | (data & 0xfc);
logerror("buffer size %03x\n", m_buffer_size);
break;
case 0x10:
m_ctrl0 = data;
m_stream->set_sample_rate(clock()/64/divider[(m_ctrl0 >> 1) & 3]);
logerror("ctr0_w %02x - play=%s rate=%d\n", m_ctrl0, m_ctrl0 & 1 ? "on" : "off", clock()/64/divider[(m_ctrl0 >> 1) & 3]);
break;
case 0x11:
m_ctrl1 = data;
logerror("ctr1_w %02x - record=%s frame_irq=%s sf_out=%x sf_in=%x\n", m_ctrl1,
m_ctrl1 & 0x80 ? "on" : "off",
m_ctrl1 & 0x40 ? "on" : "off",
(m_ctrl1 >> 2) & 0xf,
m_ctrl1 & 3);
break;
case 0x14:
m_in_irq = ((m_in_irq & 0xf0) & (~data)) | (data & 0x0f);
logerror("input irq if1=%d if0=%d cerr=%d ovr=%d ie1=%d ie0=%d oe=%d, ce=%d\n",
BIT(m_in_irq, 7),
BIT(m_in_irq, 6),
BIT(m_in_irq, 5),
BIT(m_in_irq, 4),
BIT(m_in_irq, 3),
BIT(m_in_irq, 2),
BIT(m_in_irq, 1),
BIT(m_in_irq, 0));
update_irq();
break;
case 0x18:
m_out_irq = ((m_out_irq & 0xe0) & (~data)) | (data & 0x0e);
logerror("output irq if1=%d if0=%d und=%d ie1=%d ie0=%d ue=%d\n",
BIT(m_out_irq, 7),
BIT(m_out_irq, 6),
BIT(m_out_irq, 5),
BIT(m_out_irq, 3),
BIT(m_out_irq, 2),
BIT(m_out_irq, 1));
update_irq();
break;
default:
logerror("reg_w %02x, %02x\n", offset, data);
break;
}
}
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