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cbus/pc9801_86.cpp: basic DAC logging

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This commit is contained in:
angelosa 2025-04-25 13:28:10 +02:00
parent cb26772f0f
commit 0f6cfc337a
1 changed files with 28 additions and 0 deletions
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28
src/devices/bus/cbus/pc9801_86.cpp
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@ -38,6 +38,14 @@ TODO:
#define QUEUE_SIZE 32768
#define LOG_DAC (1U << 1)
#define VERBOSE (LOG_GENERAL)
//#define LOG_OUTPUT_FUNC osd_printf_info
#include "logmacro.h"
#define LOGDAC(...) LOGMASKED(LOG_DAC, __VA_ARGS__)
DEFINE_DEVICE_TYPE(PC9801_86, pc9801_86_device, "pc9801_86", "NEC PC-9801-86")
DEFINE_DEVICE_TYPE(PC9801_SPEAKBOARD, pc9801_speakboard_device, "pc9801_spb", "NEC PC-9801 SpeakBoard")
@ -293,12 +301,20 @@ void pc9801_86_device::pcm_control_w(u8 data)
const u32 rate = (25.4_MHz_XTAL).value() / 16;
const int divs[8] = {36, 48, 72, 96, 144, 192, 288, 384};
LOGDAC("$a468 FIFO Control %02x\n", data);
if(((data & 7) != (m_pcm_ctrl & 7)) || !m_init)
{
LOGDAC("\tclk rate %01x (%d)\n", data, divs[data & 7]);
m_dac_timer->adjust(attotime::from_ticks(divs[data & 7], rate), 0, attotime::from_ticks(divs[data & 7], rate));
}
if(data & 8)
{
LOGDAC("\tFIFO reset\n");
m_head = m_tail = m_count = 0;
}
if(!(data & 0x10))
{
LOGDAC("\tIRQ clear\n");
//m_bus->int_w<5>(m_fmirq ? ASSERT_LINE : CLEAR_LINE);
if(!(queue_count() < m_irq_rate) || !(data & 0x80))
{
@ -350,9 +366,20 @@ void pc9801_86_device::io_map(address_map &map)
if (data == 0xff)
popmessage("pc9801_86: $a46a irq_rate == 0xff");
m_irq_rate = (data + 1) * 128;
LOGDAC("$a468 irq_rate %d (%02x)\n", m_irq_rate, data);
}
else
{
m_pcm_mode = data;
LOGDAC("$a468 pcm_mode %02x\n", data);
LOGDAC("\tclock %d quantization %d-bit output %d mode %d\n"
, BIT(data, 7)
, BIT(data, 6) ? 16 : 8
// 3 = stereo, 2 Left only, 1 Right only, 0 = No PCM output
, (data >> 4) & 3
, data & 3
);
}
})
);
map(0x0c, 0x0c).lrw8(
@ -474,6 +501,7 @@ TIMER_CALLBACK_MEMBER(pc9801_86_device::dac_tick)
dac_transfer();
if((queue_count() < m_irq_rate) && (m_pcm_ctrl & 0x20))
{
//LOGDAC("\tIRQ set\n");
m_pcmirq = true;
//m_bus->int_w<5>(ASSERT_LINE);
m_irqs->in_w<1>(ASSERT_LINE);