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diff --git a/src/devices/bus/vic20/std.h b/src/devices/bus/vic20/std.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Commodore VIC-20 Standard 8K/16K ROM Cartridge emulation
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __VIC20_STD__
+#define __VIC20_STD__
+
+#include "emu.h"
+#include "exp.h"
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> vic20_standard_cartridge_device
+
+class vic20_standard_cartridge_device : public device_t,
+ public device_vic20_expansion_card_interface
+{
+public:
+ // construction/destruction
+ vic20_standard_cartridge_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+
+ // device_vic20_expansion_card_interface overrides
+ virtual UINT8 vic20_cd_r(address_space &space, offs_t offset, UINT8 data, int ram1, int ram2, int ram3, int blk1, int blk2, int blk3, int blk5, int io2, int io3);
+};
+
+
+// device type definition
+extern const device_type VIC20_STD;
+
+
+
+#endif