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diff --git a/src/devices/bus/wangpc/mvc.h b/src/devices/bus/wangpc/mvc.h
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+// license:BSD-3-Clause
+// copyright-holders:Curt Coder
+/**********************************************************************
+
+ Wang PC PM-001B Medium-Resolution Video Controller emulation
+
+**********************************************************************/
+
+#pragma once
+
+#ifndef __WANGPC_MVC__
+#define __WANGPC_MVC__
+
+#include "emu.h"
+#include "wangpc.h"
+#include "video/mc6845.h"
+
+
+
+//**************************************************************************
+// TYPE DEFINITIONS
+//**************************************************************************
+
+// ======================> wangpc_mvc_device
+
+class wangpc_mvc_device : public device_t,
+ public device_wangpcbus_card_interface
+{
+public:
+ // construction/destruction
+ wangpc_mvc_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
+
+ // optional information overrides
+ virtual machine_config_constructor device_mconfig_additions() const;
+
+ // not really public
+ MC6845_UPDATE_ROW( crtc_update_row );
+ DECLARE_WRITE_LINE_MEMBER( vsync_w );
+
+protected:
+ // device-level overrides
+ virtual void device_start();
+ virtual void device_reset();
+
+ // device_wangpcbus_card_interface overrides
+ virtual UINT16 wangpcbus_mrdc_r(address_space &space, offs_t offset, UINT16 mem_mask);
+ virtual void wangpcbus_amwc_w(address_space &space, offs_t offset, UINT16 mem_mask, UINT16 data);
+ virtual UINT16 wangpcbus_iorc_r(address_space &space, offs_t offset, UINT16 mem_mask);
+ virtual void wangpcbus_aiowc_w(address_space &space, offs_t offset, UINT16 mem_mask, UINT16 data);
+
+private:
+ inline void set_irq(int state);
+
+ required_device<mc6845_device> m_crtc;
+ optional_shared_ptr<UINT16> m_video_ram;
+ optional_shared_ptr<UINT16> m_char_ram;
+ optional_shared_ptr<UINT16> m_bitmap_ram;
+
+ UINT8 m_option;
+ int m_irq;
+};
+
+
+// device type definition
+extern const device_type WANGPC_MVC;
+
+
+#endif