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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 override;
// not really public
MC6845_UPDATE_ROW( crtc_update_row );
DECLARE_WRITE_LINE_MEMBER( vsync_w );
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_wangpcbus_card_interface overrides
virtual UINT16 wangpcbus_mrdc_r(address_space &space, offs_t offset, UINT16 mem_mask) override;
virtual void wangpcbus_amwc_w(address_space &space, offs_t offset, UINT16 mem_mask, UINT16 data) override;
virtual UINT16 wangpcbus_iorc_r(address_space &space, offs_t offset, UINT16 mem_mask) override;
virtual void wangpcbus_aiowc_w(address_space &space, offs_t offset, UINT16 mem_mask, UINT16 data) override;
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
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