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// license:LGPL-2.1+
// copyright-holders:Michael Zapf
/****************************************************************************
TI-99 Speech synthesizer
We emulate the Speech Synthesizer plugged onto a P-Box adapter. The original
Speech Synthesizer device was provided as a box to be plugged into the
right side of the console. In order to be used with Geneve and SGCPU, the
speech synthesizer must be moved into the Peripheral Box.
The Speech Synthesizer used for the TI was the CD2501E, AKA TMS5200,
(internal name TMC0285), a predecessor of the TMS5220 which was used in
other commercial products.
Note that this adapter also contains the speech roms.
Michael Zapf
February 2012: Rewritten as class
*****************************************************************************/
#include "emu.h"
#include "spchsyn.h"
#include "machine/spchrom.h"
#include "speaker.h"
#define LOG_WARN (1U<<1) // Warnings
#define LOG_CONFIG (1U<<2)
#define LOG_MEM (1U<<3)
#define LOG_ADDR (1U<<4)
#define LOG_READY (1U<<5)
#define VERBOSE ( LOG_CONFIG | LOG_WARN )
#include "logmacro.h"
DEFINE_DEVICE_TYPE(TI99_SPEECH, bus::ti99::peb::ti_speech_synthesizer_device, "ti99_speech", "TI-99 Speech synthesizer (on adapter card)")
namespace bus::ti99::peb {
/****************************************************************************/
ti_speech_synthesizer_device::ti_speech_synthesizer_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) :
device_t(mconfig, TI99_SPEECH, tag, owner, clock),
device_ti99_peribox_card_interface(mconfig, *this),
m_vsp(*this, "vsp"),
m_reading(false),
m_sbe(false),
m_dec_high(false)
{
}
/*
Memory read
*/
void ti_speech_synthesizer_device::readz(offs_t offset, uint8_t *value)
{
if (machine().side_effects_disabled()) return;
if (m_sbe)
{
*value = m_vsp->status_r() & 0xff;
LOGMASKED(LOG_MEM, "read value = %02x\n", *value);
// We should clear the lines at this point. The TI-99/4A clears the
// lines by setting the address bus to a different value, but the
// Geneve may behave differently. This may not 100% reflect the real
// situation, but it ensures a safe processing.
m_vsp->combined_rsq_wsq_w(~0);
}
}
/*
Memory write
*/
void ti_speech_synthesizer_device::write(offs_t offset, uint8_t data)
{
if (machine().side_effects_disabled()) return;
if (m_sbe)
{
LOGMASKED(LOG_MEM, "write value = %02x\n", data);
m_vsp->data_w(data);
// Note that we must NOT clear the lines here. Find the lines in the
// READY callback below.
}
}
void ti_speech_synthesizer_device::setaddress_dbin(offs_t offset, int state)
{
// 1001 00xx xxxx xxx0 DBIN=1
// 1001 01xx xxxx xxx0 DBIN=0
// 1111 1000 0000 0001 mask
m_reading = (state==ASSERT_LINE);
bool valid = (((offset & 0x0400)==0) == m_reading);
if (m_dec_high)
m_sbe = ((offset & 0x7f801)==0x79000) && valid;
else
m_sbe = ((offset & 0x0f801)==0x09000) && valid;
if (m_sbe)
{
LOGMASKED(LOG_ADDR, "set address = %04x, dbin = %d\n", offset, state);
// Caution: In the current tms5220 emulation, care must be taken
// to clear one line before asserting the other line, or otherwise
// both RS* and WS* are active, which is illegal.
// Alternatively, we'll use the combined settings method
m_vsp->combined_rsq_wsq_w(m_reading ? ~tms5220_device::RS : ~tms5220_device::WS);
}
else
// If other address, turn off RS* and WS* (negative logic!)
m_vsp->combined_rsq_wsq_w(~0);
}
/****************************************************************************/
WRITE_LINE_MEMBER( ti_speech_synthesizer_device::speech_ready )
{
// The TMS5200 implementation uses true/false, not ASSERT/CLEAR semantics
// and we have to adapt a /READY to a READY line.
// The real synthesizer board uses a transistor for that purpose.
m_slot->set_ready((state==0)? ASSERT_LINE : CLEAR_LINE);
LOGMASKED(LOG_READY, "READY = %d\n", (state==0));
if ((state==0) && !m_reading)
// Clear the lines only when we are done with writing.
m_vsp->combined_rsq_wsq_w(~0);
}
void ti_speech_synthesizer_device::device_start()
{
save_item(NAME(m_reading));
save_item(NAME(m_sbe));
}
void ti_speech_synthesizer_device::device_reset()
{
m_reading = false;
m_sbe = false;
m_dec_high = (ioport("AMADECODE")->read()!=0);
}
ROM_START( ti99_speech )
ROM_REGION(0x8000, "vsm", 0)
ROM_LOAD("cd2325a.u2a", 0x0000, 0x4000, CRC(1f58b571) SHA1(0ef4f178716b575a1c0c970c56af8a8d97561ffe)) // at location u2, bottom of stack
ROM_LOAD("cd2326a.u2b", 0x4000, 0x4000, CRC(65d00401) SHA1(a367242c2c96cebf0e2bf21862f3f6734b2b3020)) // at location u2, top of stack
ROM_END
void ti_speech_synthesizer_device::device_add_mconfig(machine_config& config)
{
SPEECHROM(config, "vsm").set_reverse_bit_order(true);
SPEAKER(config, "speech_out").front_center();
CD2501E(config, m_vsp, 640000L);
m_vsp->set_speechrom_tag("vsm");
m_vsp->ready_cb().set(FUNC(ti_speech_synthesizer_device::speech_ready));
m_vsp->add_route(ALL_OUTPUTS, "speech_out", 0.50);
/*
// FIXME: Make it work. Guess we need two VSM circuits @16K.
TMS6100(config, "vsm", 640_kHz_XTAL/4);
m_vsp->m0_cb().set("vsm", FUNC(tms6100_device::m0_w));
m_vsp->m1_cb().set("vsm", FUNC(tms6100_device::m1_w));
m_vsp->addr_cb().set("vsm", FUNC(tms6100_device::add_w));
m_vsp->data_cb().set("vsm", FUNC(tms6100_device::data_line_r));
m_vsp->romclk_cb().set("vsm", FUNC(tms6100_device::clk_w));
*/
}
INPUT_PORTS_START( ti99_speech )
PORT_START( "AMADECODE" )
PORT_CONFNAME( 0x01, 0x01, "Decode AMA/AMB/AMC lines" )
PORT_CONFSETTING( 0x00, DEF_STR( Off ))
PORT_CONFSETTING( 0x01, DEF_STR( On ))
INPUT_PORTS_END
ioport_constructor ti_speech_synthesizer_device::device_input_ports() const
{
return INPUT_PORTS_NAME(ti99_speech);
}
const tiny_rom_entry *ti_speech_synthesizer_device::device_rom_region() const
{
return ROM_NAME( ti99_speech );
}
} // end namespace bus::ti99::peb
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