diff options
author | 2020-03-14 12:05:49 +0100 | |
---|---|---|
committer | 2020-03-14 12:05:59 +0100 | |
commit | e4e91bd6bda031c2b2ebedb0bdf2759305688f73 (patch) | |
tree | 684dac3c0ebff6d1f136a1394b0732354aa9683f /src/devices/sound/ks0164.cpp | |
parent | b24e7a81e880057630cd92b6ff9d8305327c155b (diff) |
ks0164: Turn it into a device (nw)
Diffstat (limited to 'src/devices/sound/ks0164.cpp')
-rw-r--r-- | src/devices/sound/ks0164.cpp | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/src/devices/sound/ks0164.cpp b/src/devices/sound/ks0164.cpp new file mode 100644 index 00000000000..fdc3cebaf9b --- /dev/null +++ b/src/devices/sound/ks0164.cpp @@ -0,0 +1,132 @@ +// license:BSD-3-Clause +// copyright-holders:Olivier Galibert + +// Yamaha KS0164/30B, rompler/dsp combo + +#include "emu.h" +#include "ks0164.h" + + +DEFINE_DEVICE_TYPE(KS0164, ks0164_device, "ks0164", "Samsung KS0164 wavetable chip") + +ks0164_device::ks0164_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) + : device_t(mconfig, KS0164, tag, owner, clock), + device_sound_interface(mconfig, *this), + device_memory_interface(mconfig, *this), + m_mem_region(*this, DEVICE_SELF), + m_cpu(*this, "cpu"), + m_mem_config("mem", ENDIANNESS_BIG, 16, 23) +{ +} + +device_memory_interface::space_config_vector ks0164_device::memory_space_config() const +{ + return space_config_vector { + std::make_pair(0, &m_mem_config) + }; +} + +void ks0164_device::device_add_mconfig(machine_config &config) +{ + KS0164CPU(config, m_cpu, DERIVED_CLOCK(1, 6)); + m_cpu->set_addrmap(AS_PROGRAM, &ks0164_device::cpu_map); +} + +void ks0164_device::device_start() +{ + if(!has_configured_map(0) && m_mem_region) { + u32 size = m_mem_region->bytes(); + u32 rend = size-1; + + // Round up to the nearest power-of-two-minus-one + u32 rmask = rend; + rmask |= rmask >> 1; + rmask |= rmask >> 2; + rmask |= rmask >> 4; + rmask |= rmask >> 8; + rmask |= rmask >> 16; + // Mirror over the high bits. rmask is a + // power-of-two-minus-one, so the xor works + space().install_rom(0, rend, ((1 << 23) - 1) ^ rmask, m_mem_region->base()); + } + + m_stream = stream_alloc(0, 2, 44100); + m_mem_cache = space().cache<1, 0, ENDIANNESS_BIG>(); +} + +void ks0164_device::device_reset() +{ + m_bank1_select = 0; + m_bank1_base = 0; + m_bank2_select = 0; + m_bank2_base = 0; +} + +u16 ks0164_device::vec_r(offs_t offset, u16 mem_mask) +{ + return m_mem_cache->read_word(offset << 1, mem_mask); +} + +u16 ks0164_device::rom_r(offs_t offset, u16 mem_mask) +{ + return m_mem_cache->read_word((offset << 1) + 0x80, mem_mask); +} + +u16 ks0164_device::bank1_r(offs_t offset, u16 mem_mask) +{ + return m_mem_cache->read_word(((offset << 1) & 0x3fff) | m_bank1_base, mem_mask); +} + +void ks0164_device::bank1_w(offs_t offset, u16 data, u16 mem_mask) +{ + m_mem_cache->write_word(((offset << 1) & 0x3fff) | m_bank1_base, data, mem_mask); +} + +u16 ks0164_device::bank2_r(offs_t offset, u16 mem_mask) +{ + return m_mem_cache->read_word(((offset << 1) & 0x3fff) | m_bank2_base, mem_mask); +} + +void ks0164_device::bank2_w(offs_t offset, u16 data, u16 mem_mask) +{ + m_mem_cache->write_word(((offset << 1) & 0x3fff) | m_bank2_base, data, mem_mask); +} + +u16 ks0164_device::bank1_select_r() +{ + return m_bank1_select; +} + +void ks0164_device::bank1_select_w(offs_t, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_bank1_select); + m_bank1_base = m_bank1_select << 14; +} + +u16 ks0164_device::bank2_select_r() +{ + return m_bank2_select; +} + +void ks0164_device::bank2_select_w(offs_t, u16 data, u16 mem_mask) +{ + COMBINE_DATA(&m_bank2_select); + m_bank2_base = m_bank2_select << 14; +} + +void ks0164_device::cpu_map(address_map &map) +{ + map(0x0000, 0x001f).r(FUNC(ks0164_device::vec_r)); + + map(0x0062, 0x0063).rw(FUNC(ks0164_device::bank1_select_r), FUNC(ks0164_device::bank1_select_w)); + map(0x0064, 0x0065).rw(FUNC(ks0164_device::bank2_select_r), FUNC(ks0164_device::bank2_select_w)); + + map(0x0080, 0x3fff).r(FUNC(ks0164_device::rom_r)); + map(0x4000, 0x7fff).rw(FUNC(ks0164_device::bank1_r), FUNC(ks0164_device::bank1_w)); + map(0x8000, 0xbfff).rw(FUNC(ks0164_device::bank2_r), FUNC(ks0164_device::bank2_w)); + map(0xe000, 0xffff).ram(); +} + +void ks0164_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) +{ +} |