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vis: fix dc offset (nw)

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This commit is contained in:
cracyc 2016-09-23 09:27:42 -05:00
parent 2888da6778
commit d6136ccced
1 changed files with 7 additions and 5 deletions
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12
src/mame/drivers/vis.cpp
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@ -72,14 +72,14 @@ void vis_audio_device::device_timer(emu_timer &timer, device_timer_id id, int pa
case 0x80: // 8bit mono
{
UINT8 sample = m_sample[m_sample_byte >> 1] >> ((m_sample_byte & 1) * 8);
m_dacl->write_unsigned8(sample);
m_dacr->write_unsigned8(sample);
m_dacl->write_signed8(sample);
m_dacr->write_signed8(sample);
m_sample_byte++;
break;
}
case 0x00: // 8bit stereo
m_dacl->write_unsigned8(m_sample[m_sample_byte >> 1] & 0xff);
m_dacr->write_unsigned8(m_sample[m_sample_byte >> 1] >> 8);
m_dacl->write_signed8(m_sample[m_sample_byte >> 1] & 0xff);
m_dacr->write_signed8(m_sample[m_sample_byte >> 1] >> 8);
m_sample_byte += 2;
break;
case 0x88: // 16bit mono
@ -99,7 +99,10 @@ void vis_audio_device::device_timer(emu_timer &timer, device_timer_id id, int pa
m_sample_byte = 0;
m_samples = 0;
if(m_count)
{
m_count--;
m_isa->drq7_w(ASSERT_LINE);
}
else
{
m_dacl->write(0);
@ -108,7 +111,6 @@ void vis_audio_device::device_timer(emu_timer &timer, device_timer_id id, int pa
m_pcm->adjust(attotime::never);
m_isa->irq7_w(ASSERT_LINE);
}
m_count--;
}
}