(MESS) Support PET user port "CB2 Sound" device [R. Belmont]

.gitattributes

@@ -1324,6 +1324,8 @@ src/emu/bus/pet/c2n.c svneol=native#text/plain
 src/emu/bus/pet/c2n.h svneol=native#text/plain
 src/emu/bus/pet/cass.c svneol=native#text/plain
 src/emu/bus/pet/cass.h svneol=native#text/plain
+src/emu/bus/pet/cb2snd.c svneol=native#text/plain
+src/emu/bus/pet/cb2snd.h svneol=native#text/plain
 src/emu/bus/pet/diag.c svneol=native#text/plain
 src/emu/bus/pet/diag.h svneol=native#text/plain
 src/emu/bus/pet/diag264_lb_tape.c svneol=native#text/plain

src/emu/bus/bus.mak

@@ -510,6 +510,7 @@ BUSOBJS += $(BUSOBJ)/pet/superpet.o
 BUSOBJS += $(BUSOBJ)/pet/user.o
 BUSOBJS += $(BUSOBJ)/pet/diag.o
 BUSOBJS += $(BUSOBJ)/pet/petuja.o
+BUSOBJS += $(BUSOBJ)/pet/cb2snd.o
 endif
 
 

src/emu/bus/pet/cb2snd.c

@@ -0,0 +1,68 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/**********************************************************************
+
+    Commodore PET userport "CB2 sound" audio device emulation
+
+    http://zimmers.net/cbmpics/cbm/PETx/petfaq.html
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#include "cb2snd.h"
+
+//**************************************************************************
+//  DEVICE DEFINITIONS
+//**************************************************************************
+
+const device_type PET_USERPORT_CB2_SOUND_DEVICE = &device_creator<pet_userport_cb2_sound_device>;
+
+#define DAC_TAG         "dac"
+
+MACHINE_CONFIG_FRAGMENT( cb2snd )
+	MCFG_SPEAKER_STANDARD_MONO("cb2spkr")
+	MCFG_SOUND_ADD(DAC_TAG, DAC, 0)
+	MCFG_SOUND_ROUTE(ALL_OUTPUTS, "cb2spkr", 1.00)
+MACHINE_CONFIG_END
+
+//-------------------------------------------------
+//  machine_config_additions - device-specific
+//  machine configurations
+//-------------------------------------------------
+
+machine_config_constructor pet_userport_cb2_sound_device::device_mconfig_additions() const
+{
+	return MACHINE_CONFIG_NAME( cb2snd );
+}
+
+//**************************************************************************
+//  LIVE DEVICE
+//**************************************************************************
+
+//-------------------------------------------------
+//  pet_userport_cb2_sound_device - constructor
+//-------------------------------------------------
+
+pet_userport_cb2_sound_device::pet_userport_cb2_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) :
+	device_t(mconfig, PET_USERPORT_CB2_SOUND_DEVICE, "PET Userport 'CB2 Sound' Device", tag, owner, clock, "petucb2", __FILE__),
+	device_pet_user_port_interface(mconfig, *this),
+	m_dac(*this, DAC_TAG)
+{
+}
+
+
+//-------------------------------------------------
+//  device_start - device-specific startup
+//-------------------------------------------------
+
+void pet_userport_cb2_sound_device::device_start()
+{
+}
+
+DECLARE_WRITE_LINE_MEMBER( pet_userport_cb2_sound_device::input_m )
+{
+	m_dac->write_unsigned8(state ? 0xff : 0x00);
+}
+

src/emu/bus/pet/cb2snd.h

@@ -0,0 +1,47 @@
+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/**********************************************************************
+
+    Commodore PET userport "CB2 sound" audio device emulation
+
+    Copyright MESS Team.
+    Visit http://mamedev.org for licensing and usage restrictions.
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __PETUSER_CB2__
+#define __PETUSER_CB2__
+
+#include "emu.h"
+#include "user.h"
+#include "sound/dac.h"
+
+//**************************************************************************
+//  TYPE DEFINITIONS
+//**************************************************************************
+
+class pet_userport_cb2_sound_device : public device_t,
+	public device_pet_user_port_interface
+{
+public:
+	// construction/destruction
+	pet_userport_cb2_sound_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+	virtual machine_config_constructor device_mconfig_additions() const;
+
+	virtual DECLARE_WRITE_LINE_MEMBER( input_m );
+
+	required_device<dac_device> m_dac;
+
+protected:
+	// device-level overrides
+	virtual void device_start();
+};
+
+
+// device type definition
+extern const device_type PET_USERPORT_CB2_SOUND_DEVICE;
+
+#endif

src/emu/bus/pet/user.c

@@ -124,8 +124,10 @@ device_pet_user_port_interface::~device_pet_user_port_interface()
 
 #include "diag.h"
 #include "petuja.h"
+#include "cb2snd.h"
 
 SLOT_INTERFACE_START( pet_user_port_cards )
 	SLOT_INTERFACE("diag", PET_USERPORT_DIAGNOSTIC_CONNECTOR)
 	SLOT_INTERFACE("petuja", PET_USERPORT_JOYSTICK_ADAPTER)
+	SLOT_INTERFACE("cb2snd", PET_USERPORT_CB2_SOUND_DEVICE)
 SLOT_INTERFACE_END