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// license:BSD-3-Clause
// copyright-holders:Nigel Barnes
/**********************************************************************
Beeb Speech Synthesiser - Watford Electronics
TODO:
- verify clock and low/high intonation
- add reset button
**********************************************************************/
#include "emu.h"
#include "beebspch.h"
#include "speaker.h"
//**************************************************************************
// DEVICE DEFINITIONS
//**************************************************************************
DEFINE_DEVICE_TYPE(BBC_BEEBSPCH, bbc_beebspch_device, "bbc_beebspch", "Beeb Speech Synthesiser")
ROM_START(beebspch)
ROM_REGION(0x4000, "exp_rom", 0)
ROM_LOAD("watford_speech.rom", 0x0000, 0x2000, CRC(731642a8) SHA1(1bd31345af6043f394bc9d8e65180c93b2356905))
ROM_RELOAD(0x2000, 0x2000)
ROM_REGION(0x10000, "sp0256", 0)
ROM_LOAD("sp0256a-al2.bin", 0x1000, 0x0800, CRC(b504ac15) SHA1(e60fcb5fa16ff3f3b69d36c7a6e955744d3feafc))
ROM_END
//-------------------------------------------------
// rom_region - device-specific ROM region
//-------------------------------------------------
const tiny_rom_entry *bbc_beebspch_device::device_rom_region() const
{
return ROM_NAME(beebspch);
}
//-------------------------------------------------
// device_add_mconfig - add device configuration
//-------------------------------------------------
void bbc_beebspch_device::device_add_mconfig(machine_config &config)
{
SPEAKER(config, "mono").front_center();
SP0256(config, m_nsp, 3120000); // TODO: generated by a LS269
m_nsp->data_request_callback().set(FUNC(bbc_beebspch_device::cb1_w));
m_nsp->standby_callback().set(FUNC(bbc_beebspch_device::cb2_w));
m_nsp->add_route(ALL_OUTPUTS, "mono", 1.0);
}
//**************************************************************************
// LIVE DEVICE
//**************************************************************************
//-------------------------------------------------
// bbc_beebspch_device - constructor
//-------------------------------------------------
bbc_beebspch_device::bbc_beebspch_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
: device_t(mconfig, BBC_BEEBSPCH, tag, owner, clock)
, device_bbc_userport_interface(mconfig, *this)
, m_nsp(*this, "sp0256")
{
}
//-------------------------------------------------
// device_start - device-specific startup
//-------------------------------------------------
void bbc_beebspch_device::device_start()
{
}
//**************************************************************************
// IMPLEMENTATION
//**************************************************************************
WRITE8_MEMBER(bbc_beebspch_device::pb_w)
{
switch (data & 0xc0)
{
case 0x40:
// intonation high
m_nsp->set_clock(3800000); // TODO: the exact frequency is unknown
break;
case 0x80:
// intonation low
m_nsp->set_clock(3500000); // CK / 4 ??
break;
}
// allophone
m_nsp->ald_w(data & 0x3f);
}
WRITE_LINE_MEMBER(bbc_beebspch_device::cb1_w)
{
m_slot->cb1_w(state);
}
WRITE_LINE_MEMBER(bbc_beebspch_device::cb2_w)
{
m_slot->cb2_w(state);
}
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