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/**********************************************************************
Wang PC Low-Resolution Video Controller emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************/
#pragma once
#ifndef __WANGPC_LVC__
#define __WANGPC_LVC__
#include "emu.h"
#include "machine/wangpcbus.h"
#include "video/mc6845.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> wangpc_lvc_device
class wangpc_lvc_device : public device_t,
public device_wangpcbus_card_interface
{
public:
// construction/destruction
wangpc_lvc_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
void crtc_update_row(mc6845_device *device, bitmap_rgb32 &bitmap, const rectangle &cliprect, UINT16 ma, UINT8 ra, UINT16 y, UINT8 x_count, INT8 cursor_x, void *param);
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;
rgb_t m_palette[16];
UINT8 m_option;
UINT16 m_scroll;
int m_irq;
};
// device type definition
extern const device_type WANGPC_LVC;
#endif
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