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diff --git a/src/devices/bus/a2bus/ssbapple.h b/src/devices/bus/a2bus/ssbapple.h
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+// license:BSD-3-Clause
+// copyright-holders:R. Belmont
+/*********************************************************************
+
+ ssbapple.h
+
+ Implementation of the SSB Apple speech card
+
+*********************************************************************/
+
+#ifndef MAME_BUS_A2BUS_SSBAPPLE_H
+#define MAME_BUS_A2BUS_SSBAPPLE_H
+
+#pragma once
+
+#include "a2bus.h"
+#include "sound/tms5220.h"
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class a2bus_ssb_device:
+ public device_t,
+ public device_a2bus_card_interface
+{
+public:
+ // construction/destruction
+ a2bus_ssb_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+ static constexpr feature_type imperfect_features() { return feature::SOUND; }
+
+ required_device<tms5220_device> m_tms;
+
+protected:
+ a2bus_ssb_device(const machine_config &mconfig, device_type type, const char *tag, device_t *owner, uint32_t clock);
+
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ // overrides of standard a2bus slot functions
+ virtual uint8_t read_cnxx(address_space &space, uint8_t offset) override;
+ virtual void write_cnxx(address_space &space, uint8_t offset, uint8_t data) override;
+ virtual bool take_c800() override;
+};
+
+// device type definition
+DECLARE_DEVICE_TYPE(A2BUS_SSBAPPLE, a2bus_ssb_device)
+
+#endif // MAME_BUS_A2BUS_A2SSBAPPLE_H