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Diffstat (limited to 'src/devices/sound/c6280.cpp')
-rw-r--r--src/devices/sound/c6280.cpp20
1 files changed, 8 insertions, 12 deletions
diff --git a/src/devices/sound/c6280.cpp b/src/devices/sound/c6280.cpp
index c0a91f36651..1b3665d40f8 100644
--- a/src/devices/sound/c6280.cpp
+++ b/src/devices/sound/c6280.cpp
@@ -1,7 +1,7 @@
// license:BSD-3-Clause
// copyright-holders:Charles MacDonald
/*
- HuC6280 sound chip emulator
+ Hudson PSG emulator
by Charles MacDonald
E-mail: cgfm2@hotmail.com
WWW: http://cgfm2.emuviews.com
@@ -36,6 +36,10 @@
- http://www.hudsonsoft.net/ww/about/about.html
- http://www.hudson.co.jp/corp/eng/coinfo/history.html
+ Integrated on:
+ HuC6280 CPU (PC Engine/TurboGrafx 16)
+ HuC6230 Sound Chip (PC-FX, with OKI ADPCM)
+
*/
#include "emu.h"
@@ -167,15 +171,8 @@ void c6280_device::sound_stream_update(sound_stream &stream, stream_sample_t **i
/* MAME specific code */
/*--------------------------------------------------------------------------*/
-READ8_MEMBER( c6280_device::c6280_r )
-{
- return m_cpudevice->io_get_buffer();
-}
-
WRITE8_MEMBER( c6280_device::c6280_w )
{
- m_cpudevice->io_set_buffer(data);
-
channel *chan = &m_channel[m_select];
/* Update stream */
@@ -256,12 +253,11 @@ WRITE8_MEMBER( c6280_device::c6280_w )
}
}
-DEFINE_DEVICE_TYPE(C6280, c6280_device, "c6280", "Hudson HuC6280")
+DEFINE_DEVICE_TYPE(C6280, c6280_device, "c6280", "Hudson Soft HuC6280 PSG")
c6280_device::c6280_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, C6280, tag, owner, clock)
, device_sound_interface(mconfig, *this)
- , m_cpudevice(*this, finder_base::DUMMY_TAG)
{
}
@@ -277,14 +273,14 @@ void c6280_device::calculate_clocks()
/* Make waveform frequency table */
for (int i = 0; i < 4096; i += 1)
{
- double step = ((clock() / rate) * 4096) / (i + 1);
+ double step = (16 * 4096) / (i + 1);
m_wave_freq_tab[(1 + i) & 0xFFF] = (uint32_t)step;
}
/* Make noise frequency table */
for (int i = 0; i < 32; i += 1)
{
- double step = ((clock() / rate) * 32) / (i+1);
+ double step = (16 * 32) / (i+1);
m_noise_freq_tab[i] = (uint32_t)step;
}