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// license:BSD-3-Clause
// copyright-holders:David Haywood
/************************************************************************************
Bellfruit dotmatrix driver, (under heavy construction !!!)
*************************************************************************************/
#ifndef MAME_VIDEO_BFM_DM01
#define MAME_VIDEO_BFM_DM01
#pragma once
#include "emupal.h"
#include "screen.h"
class bfm_dm01_device : public device_t
{
public:
bfm_dm01_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
auto busy_callback() { return m_busy_cb.bind(); }
uint8_t control_r();
void control_w(uint8_t data);
uint8_t mux_r();
void mux_w(uint8_t data);
uint8_t comm_r();
void comm_w(uint8_t data);
uint8_t unknown_r();
void unknown_w(uint8_t data);
void writedata(uint8_t data);
int busy(void);
void bfm_dm01_memmap(address_map &map);
protected:
// device-level overrides
virtual void device_add_mconfig(machine_config &config) override;
virtual void device_start() override;
virtual void device_reset() override;
private:
static constexpr unsigned BYTES_PER_ROW = 9;
required_device<cpu_device> m_matrixcpu;
// internal state
int m_data_avail;
int m_control;
int m_xcounter;
int m_segbuffer[65];
int m_busy;
uint8_t m_scanline[BYTES_PER_ROW];
uint8_t m_comdata;
output_finder<65 * 21> m_dotmatrix;
devcb_write_line m_busy_cb;
int read_data();
INTERRUPT_GEN_MEMBER(nmi_line_assert);
};
DECLARE_DEVICE_TYPE(BFM_DM01, bfm_dm01_device)
#endif // MAME_VIDEO_BFM_DM01
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