bbc: Added Beeb Speech Synthesiser device.

scripts/src/bus.lua

@@ -333,6 +333,8 @@ if (BUSES["BBC_USERPORT"]~=null) then
 	files {
 		MAME_DIR .. "src/devices/bus/bbc/userport/userport.cpp",
 		MAME_DIR .. "src/devices/bus/bbc/userport/userport.h",
+		MAME_DIR .. "src/devices/bus/bbc/userport/beebspch.cpp",
+		MAME_DIR .. "src/devices/bus/bbc/userport/beebspch.h",
 		MAME_DIR .. "src/devices/bus/bbc/userport/pointer.cpp",
 		MAME_DIR .. "src/devices/bus/bbc/userport/pointer.h",
 		MAME_DIR .. "src/devices/bus/bbc/userport/cfa3000kbd.cpp",

src/devices/bus/bbc/userport/beebspch.cpp

@@ -0,0 +1,126 @@
+// 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"
+
+
+//**************************************************************************
+//  MACROS/CONSTANTS
+//**************************************************************************
+
+#define SP0256_TAG      "sp0256"
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+DEFINE_DEVICE_TYPE(BBC_BEEBSPCH, bbc_beebspch_device, "bbc_beebspch", "Beeb Speech Synthesiser")
+
+ROM_START(beebspch)
+	ROM_REGION(0x4000, "rom", 0)
+	ROM_LOAD("watford_speech.rom", 0x0000, 0x2000, CRC(731642a8) SHA1(1bd31345af6043f394bc9d8e65180c93b2356905))
+	ROM_RELOAD(0x2000, 0x2000)
+
+	ROM_REGION(0x10000, SP0256_TAG, 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
+//-------------------------------------------------
+
+MACHINE_CONFIG_START(bbc_beebspch_device::device_add_mconfig)
+	MCFG_SPEAKER_STANDARD_MONO("mono")
+	MCFG_SOUND_ADD(SP0256_TAG, SP0256, 14_MHz_XTAL / 4) // TODO: Crystal unknown
+	MCFG_SP0256_DATA_REQUEST_CB(WRITELINE(bbc_beebspch_device, cb1_w))
+	MCFG_SP0256_STANDBY_CB(WRITELINE(bbc_beebspch_device, cb2_w))
+	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "mono", 1.0)
+MACHINE_CONFIG_END
+
+
+//**************************************************************************
+//  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_rom(*this, "rom")
+	, m_nsp(*this, SP0256_TAG)
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void bbc_beebspch_device::device_start()
+{
+}
+
+//-------------------------------------------------
+//  device_reset - device-specific reset
+//-------------------------------------------------
+
+void bbc_beebspch_device::device_reset()
+{
+	machine().root_device().membank("bank4")->configure_entry(13, memregion("rom")->base());
+}
+
+//**************************************************************************
+//  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(space, 0, 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);
+}

src/devices/bus/bbc/userport/beebspch.h

@@ -0,0 +1,54 @@
+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+    Beeb Speech Synthesiser - Watford Electronics
+
+**********************************************************************/
+
+#ifndef MAME_BUS_BBC_USERPORT_BEEBSPCH_H
+#define MAME_BUS_BBC_USERPORT_BEEBSPCH_H
+
+#include "userport.h"
+#include "sound/sp0256.h"
+
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> bbc_beebspch_device
+
+class bbc_beebspch_device :
+	public device_t,
+	public device_bbc_userport_interface
+{
+public:
+	// construction/destruction
+	bbc_beebspch_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+	DECLARE_WRITE_LINE_MEMBER(cb1_w);
+	DECLARE_WRITE_LINE_MEMBER(cb2_w);
+
+protected:
+	// device-level overrides
+	virtual void device_start() override;
+	virtual void device_reset() override;
+
+	// optional information overrides
+	virtual void device_add_mconfig(machine_config &config) override;
+	virtual const tiny_rom_entry *device_rom_region() const override;
+
+	virtual DECLARE_WRITE8_MEMBER(pb_w) override;
+
+private:
+	required_memory_region m_rom;
+	required_device<sp0256_device> m_nsp;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(BBC_BEEBSPCH, bbc_beebspch_device)
+
+
+#endif // MAME_BUS_BBC_USERPORT_BEEBSPCH_H

src/devices/bus/bbc/userport/userport.cpp

@@ -115,6 +115,7 @@ WRITE8_MEMBER(bbc_userport_slot_device::pb_w)
 
 
 // slot devices
+#include "beebspch.h"
 #include "pointer.h"
 #include "cfa3000kbd.h"
 
@@ -122,7 +123,7 @@ WRITE8_MEMBER(bbc_userport_slot_device::pb_w)
 void bbc_userport_devices(device_slot_interface &device)
 {
 	device.option_add("amxmouse",   BBC_AMXMOUSE);        /* AMX Mouse */
-//  device.option_add("beebsynth",  BBC_BEEBSYNTH);       /* Beeb Speech Synthesiser (Watford) */
+	device.option_add("beebspch",   BBC_BEEBSPCH);        /* Beeb Speech Synthesiser (Watford Electronics) */
 	device.option_add("m512mouse",  BBC_M512MOUSE);       /* Acorn Mouse (provided with Master 512) */
 	device.option_add("tracker",    BBC_TRACKER);         /* Marconi RB2 Tracker Ball / Acorn Tracker Ball */
 //  device.option_add("music4000",  BBC_MUSIC4000);       /* Hybrid Music 4000 Keyboard */