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author | 2019-03-30 10:32:00 +0100 | |
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committer | 2019-04-09 08:53:40 +0200 | |
commit | adc473b74dac2cee67b65014e0099b1918b2ee1c (patch) | |
tree | 5c33b3068b8117671cac187c2e1458004d2ea8e6 /src/devices/sound/swp20.cpp | |
parent | 31ff9e8cea38027c00f807b91974c30a5fe57286 (diff) |
swp20, dspv: Skeletons [O. Galibert]
Diffstat (limited to 'src/devices/sound/swp20.cpp')
-rw-r--r-- | src/devices/sound/swp20.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/devices/sound/swp20.cpp b/src/devices/sound/swp20.cpp new file mode 100644 index 00000000000..aa4bddaad7d --- /dev/null +++ b/src/devices/sound/swp20.cpp @@ -0,0 +1,75 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert + +// Yamaha SWP20, rompler + +#include "emu.h" +#include "swp20.h" + +DEFINE_DEVICE_TYPE(SWP20, swp20_device, "swp20", "Yamaha SWP20 sound chip") + +swp20_device::swp20_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, SWP20, tag, owner, clock), + device_sound_interface(mconfig, *this), + device_rom_interface(mconfig, *this, 23+2, ENDIANNESS_LITTLE, 16) +{ +} + +void swp20_device::device_start() +{ +} + +void swp20_device::device_reset() +{ + m_p3c_port = 0x00; + m_p3c_address = true; +} + +void swp20_device::rom_bank_updated() +{ +} + +void swp20_device::map(address_map &map) +{ + map(0x00, 0x3f).rw(FUNC(swp20_device::snd_r), FUNC(swp20_device::snd_w)); + + map(0x3c, 0x3c).w(FUNC(swp20_device::p3c_w)); +} + +// init mu80: +// 48394: <- 47aea +// write 04.7f 00.14 01.90 to +3c +// write 01.90 80-ff, 473ea++ +// write 01.94 80-ff, 4746a++ +// write 01.98 80-ff, 474ea++ +// write 01.9c 80-ff, 4756a++ + +// write 01.a0 +// write 40-5f.data +// etc + +void swp20_device::p3c_w(u8 data) +{ + if(m_p3c_address) + m_p3c_port = data; + else + logerror("p3c %02x = %02x\n", m_p3c_port, data); + + m_p3c_address = !m_p3c_address; +} + +u8 swp20_device::snd_r(offs_t offset) +{ + logerror("r %02x %s\n", offset, machine().describe_context()); + return 0; +} + +void swp20_device::snd_w(offs_t offset, u8 data) +{ + logerror("w %02x, %02x %s\n", offset, data, machine().describe_context()); +} + +void swp20_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) +{ +} + |