// 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; /* 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_stream(nullptr), m_space_config("ram", ENDIANNESS_LITTLE, 8, 16, 0, nullptr, *ADDRESS_MAP_NAME(upd7752_ram)), m_status(0), m_ram_addr(0), m_mode(0) { } //------------------------------------------------- // 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 : nullptr; } //------------------------------------------------- // 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; } }