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diff --git a/src/devices/bus/aquarius/c1541.h b/src/devices/bus/aquarius/c1541.h
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+// license:BSD-3-Clause
+// copyright-holders:Nigel Barnes
+/**********************************************************************
+
+ Aquarius C1541 DOS Interface by Ron Koenig
+
+**********************************************************************/
+
+#ifndef MAME_BUS_AQUARIUS_C1541_H
+#define MAME_BUS_AQUARIUS_C1541_H
+
+#pragma once
+
+#include "slot.h"
+#include "bus/cbmiec/cbmiec.h"
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+class aquarius_c1541_device :
+ public device_t,
+ public device_aquarius_cartridge_interface
+{
+public:
+ // construction/destruction
+ aquarius_c1541_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
+
+ static constexpr feature_type unemulated_features() { return feature::DISK; }
+
+protected:
+ // device-level overrides
+ virtual void device_start() override;
+
+ // optional information overrides
+ virtual void device_add_mconfig(machine_config &config) override;
+
+ // device_aquarius_cartridge_interface overrides
+ virtual uint8_t mreq_ce_r(offs_t offset) override;
+ virtual uint8_t iorq_r(offs_t offset) override;
+ virtual void iorq_w(offs_t offset, uint8_t data) override;
+
+private:
+ required_device<cbm_iec_device> m_iec;
+};
+
+
+// device type definition
+DECLARE_DEVICE_TYPE(AQUARIUS_C1541, aquarius_c1541_device)
+
+
+#endif // MAME_BUS_AQUARIUS_C1541_H