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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************

    Wang PC-PM031-B Extended Memory Board emulation

**********************************************************************/

#ifndef MAME_BUS_WANGPC_EMB_H
#define MAME_BUS_WANGPC_EMB_H

#pragma once

#include "wangpc.h"



//**************************************************************************
//  TYPE DEFINITIONS
//**************************************************************************

// ======================> wangpc_emb_device

class wangpc_emb_device : public device_t,
							public device_wangpcbus_card_interface
{
public:
	// construction/destruction
	wangpc_emb_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_reset() override;

	// device_wangpcbus_card_interface overrides
	virtual uint16_t wangpcbus_mrdc_r(offs_t offset, uint16_t mem_mask) override;
	virtual void wangpcbus_amwc_w(offs_t offset, uint16_t mem_mask, uint16_t data) override;
	virtual uint16_t wangpcbus_iorc_r(offs_t offset, uint16_t mem_mask) override;
	virtual void wangpcbus_aiowc_w(offs_t offset, uint16_t mem_mask, uint16_t data) override;

private:
	optional_shared_ptr<uint16_t> m_ram;
	uint16_t m_option;
	int m_parity_error;
	int m_parity_odd;
};


// device type definition
DECLARE_DEVICE_TYPE(WANGPC_EMB, wangpc_emb_device)

#endif // MAME_BUS_WANGPC_EMB_H