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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
OKI MSM6255 Dot Matrix LCD Controller implementation
**********************************************************************/
#ifndef MAME_VIDEO_MSM6255_H
#define MAME_VIDEO_MSM6255_H
#pragma once
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> msm6255_device
class msm6255_device : public device_t,
public device_memory_interface,
public device_video_interface
{
public:
// construction/destruction
msm6255_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
virtual void map(address_map &map);
uint32_t screen_update(screen_device &device, bitmap_ind16 &bitmap, const rectangle &cliprect);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
// device_memory_interface overrides
virtual space_config_vector memory_space_config() const override;
private:
// registers
enum
{
REGISTER_MOR = 0,
REGISTER_PR,
REGISTER_HNR,
REGISTER_DVR,
REGISTER_CPR,
REGISTER_SLR,
REGISTER_SUR,
REGISTER_CLR,
REGISTER_CUR
};
uint8_t read_byte(uint16_t ma, uint8_t ra);
void update_cursor();
void draw_scanline(bitmap_ind16 &bitmap, const rectangle &cliprect, int y, uint16_t ma, uint8_t ra = 0);
void update_graphics(bitmap_ind16 &bitmap, const rectangle &cliprect);
void update_text(bitmap_ind16 &bitmap, const rectangle &cliprect);
uint8_t ir_r();
void ir_w(uint8_t data);
uint8_t dr_r();
void dr_w(uint8_t data);
void msm6255(address_map &map);
const address_space_config m_space_config;
uint8_t m_ir; // instruction register
uint8_t m_mor; // mode control register
uint8_t m_pr; // character pitch register
uint8_t m_hnr; // horizontal character number register
uint8_t m_dvr; // duty number register
uint8_t m_cpr; // cursor form register
uint8_t m_slr; // start address (lower) register
uint8_t m_sur; // start address (upper) register
uint8_t m_clr; // cursor address (lower) register
uint8_t m_cur; // cursor address (upper) register
int m_cursor; // is cursor displayed
int m_frame; // frame counter
};
// device type definition
DECLARE_DEVICE_TYPE(MSM6255, msm6255_device)
#endif // MAME_VIDEO_MSM6255_H
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