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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
HD44102 Dot Matrix Liquid Crystal Graphic Display Column Driver
**********************************************************************/
#ifndef MAME_VIDEO_HD44102_H
#define MAME_VIDEO_HD44102_H
#pragma once
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> hd44102_device
class hd44102_device : public device_t
{
public:
// construction/destruction
hd44102_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock = 0);
// inline configuration helpers
void set_screen_offsets(int sx, int sy) { m_sx = sx; m_sy = sy; } // when using screen_update
u8 read(offs_t offset);
void write(offs_t offset, u8 data);
const u8 *render();
u32 screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); // optional
protected:
// device-level overrides
virtual void device_start() override ATTR_COLD;
virtual void device_reset() override ATTR_COLD;
private:
u8 status_r();
void control_w(u8 data);
void count_up_or_down();
u8 data_r();
void data_w(u8 data);
u8 m_ram[4][50]; // display memory
u8 m_render_buf[32 * 50]; // intermediate pixel buffer
u8 m_status; // status register
u8 m_output; // output register
u8 m_page; // display start page
int m_x; // X address
int m_y; // Y address
int m_sx;
int m_sy;
};
// device type definition
DECLARE_DEVICE_TYPE(HD44102, hd44102_device)
#endif // MAME_VIDEO_HD44102_H
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