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diff --git a/src/devices/bus/pet/cb2snd.h b/src/devices/bus/pet/cb2snd.h
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/**********************************************************************
+
+ Commodore PET userport "CB2 sound" audio device emulation
+
+**********************************************************************/
+
+#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