diff options
Diffstat (limited to 'src/devices/sound/upd7752.c')
-rw-r--r-- | src/devices/sound/upd7752.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/src/devices/sound/upd7752.c b/src/devices/sound/upd7752.c new file mode 100644 index 00000000000..bebe180f722 --- /dev/null +++ b/src/devices/sound/upd7752.c @@ -0,0 +1,195 @@ +// license:BSD-3-Clause +// copyright-holders:Angelo Salese +/*************************************************************************** + +NEC uPD7752 Voice Synthesizing LSI + +skeleton device + +***************************************************************************/ + +#include "emu.h" +#include "sound/upd7752.h" + + + +//************************************************************************** +// GLOBAL VARIABLES +//************************************************************************** + +// device type definition +const device_type UPD7752 = &device_creator<upd7752_device>; + +/* TODO: unknown exact size */ +static ADDRESS_MAP_START( upd7752_ram, AS_0, 8, upd7752_device ) +// AM_RANGE(0x0000, 0x7fff) AM_ROM + AM_RANGE(0x0000, 0xffff) AM_RAM +ADDRESS_MAP_END + +//************************************************************************** +// LIVE DEVICE +//************************************************************************** + +//------------------------------------------------- +// upd7752_device - constructor +//------------------------------------------------- + +upd7752_device::upd7752_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) + : device_t(mconfig, UPD7752, "uPD7752", tag, owner, clock, "upd7752", __FILE__), + device_sound_interface(mconfig, *this), + device_memory_interface(mconfig, *this), + m_space_config("ram", ENDIANNESS_LITTLE, 8, 16, 0, NULL, *ADDRESS_MAP_NAME(upd7752_ram)) +{ +} + + +//------------------------------------------------- +// memory_space_config - return a description of +// any address spaces owned by this device +//------------------------------------------------- + +const address_space_config *upd7752_device::memory_space_config(address_spacenum spacenum) const +{ + return (spacenum == AS_0) ? &m_space_config : NULL; +} + + +//------------------------------------------------- +// device_start - device-specific startup +//------------------------------------------------- + +void upd7752_device::device_start() +{ + /* TODO: clock */ + m_stream = stream_alloc(0, 1, clock() / 64); + + m_status = 0; +} + + +//------------------------------------------------- +// device_reset - device-specific reset +//------------------------------------------------- + +void upd7752_device::device_reset() +{ +} + + +//------------------------------------------------- +// device_stop - device-specific stop +//------------------------------------------------- + +void upd7752_device::device_stop() +{ +} + +//------------------------------------------------- +// sound_stream_update - handle a stream update +//------------------------------------------------- + +void upd7752_device::sound_stream_update(sound_stream &stream, stream_sample_t **inputs, stream_sample_t **outputs, int samples) +{ +} + +//************************************************************************** +// INLINE HELPERS +//************************************************************************** + +inline UINT8 upd7752_device::readbyte(offs_t address) +{ + return space().read_byte(address); +} + +//------------------------------------------------- +// writebyte - write a byte at the given address +//------------------------------------------------- + +inline void upd7752_device::writebyte(offs_t address, UINT8 data) +{ + space().write_byte(address, data); +} + +//************************************************************************** +// READ/WRITE HANDLERS +//************************************************************************** + +void upd7752_device::status_change(UINT8 flag,bool type) +{ + if(type == true) + m_status |= flag; + else + m_status &= ~flag; +} + +READ8_MEMBER( upd7752_device::read ) +{ + switch(offset & 3) + { + //[0x00]: status register + //x--- ---- BSY busy status (1) processing (0) stopped + //-x-- ---- REQ audio parameter (1) input request (0) prohibited (???) + //--x- ---- ~INT / EXT message data (1) Outside (0) Inside + //---x ---- ERR error flag + case 0x00: return m_status; + //[0x02]: port 0xe2 latch? + case 0x02: return 0xff; + //[0x03]: port 0xe3 latch? + case 0x03: return 0xff; + } + return 0xff; +} + +WRITE8_MEMBER( upd7752_device::write ) +{ + switch(offset & 3) + { + // [0x00]: audio parameter transfer + case 0x00: + if(m_status & EXT) + { + /* + [0] xxxx x--- number of frames (times) to apply next table (N1) + ---- -x-- Quantized Magnification Data (QMAG) + ---- --x- Selective Interpolation Data (SI) + ---- ---x Voicing/Unvoicing Data (VU) + [1] xxxx ---- amp Voice source amplitude + ---- x--- Fricative Voice data + ---- -xxx Pitch + (repeat for N1 times) + if [0] & 0xf8 == 0 then command stop + */ + writebyte(m_ram_addr++,data); + } + //else + // ... + + break; + + // [0x02]: mode set + // ---- -x-- Frame periodic analysis (0) 10 ms / frame (1) 20 ms / frame + // ---- --xx Utterance (tempo?) speed + // 00 : NORMAL SPEED + // 01 : SLOW SPEED + // 10 : FAST SPEED + // 11 : Setting prohibited + + case 0x02: + m_mode = data & 7; + break; + + case 0x03: //command set + switch(data) + { + case 0xfe: // external message select cmd + status_change(EXT,true); + status_change(REQ,true); + //TODO: BSY flag too + m_ram_addr = 0; + break; + } + + break; + + } +} |