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// license:BSD-3-Clause
// copyright-holders:Dirk Best
/***************************************************************************
IBM-PC printer interface
***************************************************************************/
#ifndef MAME_MACHINE_PC_LPT_H
#define MAME_MACHINE_PC_LPT_H
#pragma once
#include "bus/centronics/ctronics.h"
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
class pc_lpt_device : public device_t
{
public:
pc_lpt_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL());
// configuration helpers
auto irq_handler() { return m_irq_handler.bind(); }
uint8_t read(offs_t offset);
void write(offs_t offset, uint8_t data);
uint8_t data_r();
void data_w(uint8_t data);
uint8_t status_r();
uint8_t control_r( );
void control_w(uint8_t data);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
virtual void device_add_mconfig(machine_config &config) override;
private:
void update_irq();
void write_irq_enabled(int state);
void write_centronics_ack(int state);
enum
{
CONTROL_STROBE = 1,
CONTROL_AUTOFD = 2,
CONTROL_INIT = 4,
CONTROL_SELECT = 8,
CONTROL_IRQ_ENABLED = 16,
CONTROL_OUTPUT_ENABLED = 32
};
enum
{
STATUS_FAULT = 8,
STATUS_SELECT = 16,
STATUS_PERROR = 32,
STATUS_ACK = 64,
STATUS_BUSY = 128
};
// internal state
int m_irq;
uint8_t m_data;
uint8_t m_control;
int m_irq_enabled;
int m_centronics_ack;
devcb_write_line m_irq_handler;
required_device<input_buffer_device> m_cent_data_in;
required_device<output_latch_device> m_cent_data_out;
required_device<input_buffer_device> m_cent_status_in;
required_device<input_buffer_device> m_cent_ctrl_in;
required_device<output_latch_device> m_cent_ctrl_out;
};
DECLARE_DEVICE_TYPE(PC_LPT, pc_lpt_device)
#endif // MAME_MACHINE_PC_LPT_H
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