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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Xerox 820/820-II ASCII keyboard emulation
*********************************************************************/
#ifndef MAME_MACHINE_X820KB_H
#define MAME_MACHINE_X820KB_H
#pragma once
#include "cpu/mcs48/mcs48.h"
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
// ======================> xerox_820_keyboard_device
class xerox_820_keyboard_device : public device_t
{
public:
// construction/destruction
xerox_820_keyboard_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
auto kbstb_wr_callback() { return m_kbstb_cb.bind(); }
uint8_t read() { return m_bus; }
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_reset_after_children() override;
// optional information overrides
virtual const tiny_rom_entry *device_rom_region() const override;
virtual void device_add_mconfig(machine_config &config) override;
virtual ioport_constructor device_input_ports() const override;
private:
required_device<i8048_device> m_maincpu;
required_ioport_array<16> m_y;
devcb_write_line m_kbstb_cb;
uint8_t m_p1;
uint8_t m_bus;
uint8_t kb_p1_r();
void kb_p1_w(uint8_t data);
uint8_t kb_p2_r();
DECLARE_READ_LINE_MEMBER( kb_t0_r );
DECLARE_READ_LINE_MEMBER( kb_t1_r );
void kb_bus_w(uint8_t data);
};
// device type definition
DECLARE_DEVICE_TYPE(XEROX_820_KEYBOARD, xerox_820_keyboard_device)
#endif // MAME_MACHINE_X820KB_H
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