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diff --git a/src/devices/bus/multibus/serad.h b/src/devices/bus/multibus/serad.h
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+// license:BSD-3-Clause
+// copyright-holders:Patrick Mackinlay
+
+#ifndef MAME_BUS_MULTIBUS_SERAD_H
+#define MAME_BUS_MULTIBUS_SERAD_H
+
+#pragma once
+
+#include "multibus.h"
+
+#include "cpu/i8085/i8085.h"
+#include "machine/mc68681.h"
+#include "machine/input_merger.h"
+#include "bus/rs232/rs232.h"
+
+class serad_device
+ : public device_t
+ , public device_multibus_interface
+{
+public:
+ serad_device(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock);
+
+protected:
+ // device_t overrides
+ virtual const tiny_rom_entry *device_rom_region() const override;
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual ioport_constructor device_input_ports() const override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+
+private:
+ void mem_map(address_map &map);
+ void pio_map(address_map &map);
+
+ template <unsigned S> void rst55_w(u8 data) { m_cpu->set_input_line(I8085_RST55_LINE, S); }
+ void apzint_w(u8 data) { int_w(2, 0); }
+
+ required_device<i8085a_cpu_device> m_cpu;
+ required_shared_ptr<u8> m_mbx;
+ required_device<input_merger_any_high_device> m_rst65;
+ required_device_array<scn2681_device, 3> m_duart;
+ required_device_array<rs232_port_device, 6> m_port;
+
+ bool m_installed;
+};
+
+DECLARE_DEVICE_TYPE(SERAD, serad_device)
+
+#endif // MAME_BUS_MULTIBUS_SERAD_H