diff --git a/src/devices/bus/isa/lrk330.h b/src/devices/bus/isa/lrk330.h
new file mode 100644
index 00000000000..b75a50fa7a3
--- /dev/null
+++ b/src/devices/bus/isa/lrk330.h
@@ -0,0 +1,38 @@
+// license:BSD-3-Clause
+// copyright-holders:AJR
+
+#ifndef MAME_BUS_ISA_LRK330_H
+#define MAME_BUS_ISA_LRK330_H
+
+#pragma once
+
+#include "isa.h"
+#include "cpu/mcs51/mcs51.h"
+
+class lrk331_device : public device_t, public device_isa16_card_interface
+{
+public:
+	lrk331_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock);
+
+	static constexpr feature_type unemulated_features() { return feature::DISK; }
+
+protected:
+	virtual void device_start() override;
+	virtual void device_reset() override;
+
+	virtual ioport_constructor device_input_ports() const override;
+	virtual const tiny_rom_entry *device_rom_region() const override;
+	virtual void device_add_mconfig(machine_config &config) override;
+
+private:
+	void ucode_map(address_map &map);
+	void ext_map(address_map &map);
+
+	required_device<mcs51_cpu_device> m_mcu;
+	required_region_ptr<u8> m_bios;
+	required_ioport m_config;
+};
+
+DECLARE_DEVICE_TYPE(LRK331, lrk331_device)
+
+#endif // MAME_BUS_ISA_LRK330_H