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diff --git a/src/devices/bus/thomson/cd90_015.h b/src/devices/bus/thomson/cd90_015.h
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+// license:BSD-3-Clause
+// copyright-holders:Olivier Galibert
+
+// CD 90-015 - Floppy drive controller built from a hd 46503s aka hd6843 aka mc6843
+//
+// Handles up to four 5.25 single-sided drives (DD 90-015)
+
+#ifndef MAME_BUS_THOMSON_CD90_015_H
+#define MAME_BUS_THOMSON_CD90_015_H
+
+#include "extension.h"
+#include "imagedev/floppy.h"
+#include "machine/mc6843.h"
+
+class cd90_015_device : public device_t, public thomson_extension_interface
+{
+public:
+ cd90_015_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock = 0);
+ virtual ~cd90_015_device() = default;
+
+ virtual void rom_map(address_map &map) override;
+ virtual void io_map(address_map &map) override;
+
+protected:
+ virtual const tiny_rom_entry *device_rom_region() const override;
+ virtual void device_add_mconfig(machine_config &config) override;
+ virtual void device_start() override;
+ virtual void device_reset() override;
+ virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
+
+private:
+ required_device<mc6843_device> m_fdc;
+ required_device_array<floppy_connector, 4> m_floppy;
+ required_memory_region m_rom;
+
+ emu_timer *m_motor_timer[4];
+ u8 m_select;
+
+ void select_w(u8 data);
+ u8 motor_r();
+
+ static void floppy_formats(format_registration &fr);
+ static void floppy_drives(device_slot_interface &device);
+};
+
+DECLARE_DEVICE_TYPE(CD90_015, cd90_015_device)
+
+#endif