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// license:BSD-3-Clause
// copyright-holders:Patrick Mackinlay
#ifndef MAME_VIDEO_DP8510_H
#define MAME_VIDEO_DP8510_H
#pragma once
class dp8510_device : public device_t
{
public:
dp8510_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock);
static const char *const BITBLT_OP[];
static const int FIFO_SIZE = 16;
DECLARE_WRITE_LINE_MEMBER(line_drawing) { m_line_drawing = state; }
DECLARE_WRITE_LINE_MEMBER(barrel_input_select) { m_barrel_input_select = state; }
DECLARE_WRITE_LINE_MEMBER(pixel_data_input) { m_pixel_data_input = state; }
DECLARE_WRITE_LINE_MEMBER(data_output_select) { m_data_output_select = state; }
DECLARE_WRITE_LINE_MEMBER(left_mask_enable) { m_left_mask = state; }
DECLARE_WRITE_LINE_MEMBER(right_mask_enable) { m_right_mask = state; }
enum control_mask : u16
{
CONTROL_RM = 0x000f, // right mask
CONTROL_LM = 0x00f0, // left mask
CONTROL_SN = 0x0f00, // shift number
CONTROL_FS = 0xf000 // function select
};
enum control_fs_mask : u16
{
FS_0 = 0x1000,
FS_1 = 0x2000,
FS_2 = 0x4000,
FS_3 = 0x8000
};
void control_w(const u16 data);
void source_w(const u16 data, const bool fifo_write = true);
void destination_w(const u16 data, const bool fifo_write = false);
u16 output_r() const;
u8 pixel_r(const offs_t pixel_address) const;
protected:
virtual void device_start() override;
virtual void device_reset() override;
u16 logic_unit(const u16 src, const u16 dst) const;
u16 fifo_r();
void fifo_w(const u16 data);
private:
// input lines
int m_line_drawing;
int m_barrel_input_select;
int m_pixel_data_input;
int m_data_output_select;
int m_left_mask;
int m_right_mask;
// registers and latches
u16 m_control;
u16 m_barrel_input_latch;
u16 m_logic_output;
u16 m_fifo_output_latch;
// fifo
u16 m_fifo[FIFO_SIZE];
u8 m_fifo_head;
u8 m_fifo_tail;
// helper internal state
u16 m_f0;
u16 m_f1;
u16 m_f2;
u16 m_f3;
};
// device type definition
DECLARE_DEVICE_TYPE(DP8510, dp8510_device)
#endif // MAME_VIDEO_DP8510_H
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