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// license:BSD-3-Clause
// copyright-holders:Dirk Best
/***************************************************************************
IBM-PC printer interface
***************************************************************************/
#ifndef __PC_LPT_H__
#define __PC_LPT_H__
#include "bus/centronics/ctronics.h"
#define MCFG_PC_LPT_IRQ_HANDLER(_devcb) \
devcb = &pc_lpt_device::set_irq_handler(*device, DEVCB_##_devcb);
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
class pc_lpt_device : public device_t
{
public:
pc_lpt_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// static configuration helpers
template<class _Object> static devcb_base &set_irq_handler(device_t &device, _Object object) { return downcast<pc_lpt_device &>(device).m_irq_handler.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
DECLARE_READ8_MEMBER( data_r );
DECLARE_WRITE8_MEMBER( data_w );
DECLARE_READ8_MEMBER( status_r );
DECLARE_READ8_MEMBER( control_r );
DECLARE_WRITE8_MEMBER( control_w );
DECLARE_WRITE_LINE_MEMBER( write_irq_enabled );
DECLARE_WRITE_LINE_MEMBER( write_centronics_ack );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual machine_config_constructor device_mconfig_additions() const;
private:
void update_irq();
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 m_data;
UINT8 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;
};
extern const device_type PC_LPT;
#endif /* __PC_LPT__ */
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