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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************
Intel 8212 8-Bit Input/Output Port emulation
**********************************************************************
_____ _____
_DS1 1 |* \_/ | 24 Vcc
MD 2 | | 23 _INT
DI1 3 | | 22 DI8
DO1 4 | | 21 DO8
DI2 5 | | 20 DI7
DO2 6 | 8212 | 19 DO7
DI3 7 | | 18 DI6
DO3 8 | | 17 DO6
DI4 9 | | 16 DI5
DO4 10 | | 15 DO5
STB 11 | | 14 _CLR
GND 12 |_____________| 13 DS2
**********************************************************************/
#pragma once
#ifndef __I8212__
#define __I8212__
#include "emu.h"
///*************************************************************************
// MACROS / CONSTANTS
///*************************************************************************
enum
{
I8212_MODE_INPUT = 0,
I8212_MODE_OUTPUT
};
///*************************************************************************
// INTERFACE CONFIGURATION MACROS
///*************************************************************************
#define MCFG_I8212_IRQ_CALLBACK(_write) \
devcb = &i8212_device::set_irq_wr_callback(*device, DEVCB_##_write);
#define MCFG_I8212_DI_CALLBACK(_read) \
devcb = &i8212_device::set_di_rd_callback(*device, DEVCB_##_read);
#define MCFG_I8212_DO_CALLBACK(_write) \
devcb = &i8212_device::set_do_wr_callback(*device, DEVCB_##_write);
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> i8212_device
class i8212_device : public device_t
{
public:
// construction/destruction
i8212_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb_base &set_irq_wr_callback(device_t &device, _Object object) { return downcast<i8212_device &>(device).m_write_irq.set_callback(object); }
template<class _Object> static devcb_base &set_di_rd_callback(device_t &device, _Object object) { return downcast<i8212_device &>(device).m_read_di.set_callback(object); }
template<class _Object> static devcb_base &set_do_wr_callback(device_t &device, _Object object) { return downcast<i8212_device &>(device).m_write_do.set_callback(object); }
DECLARE_READ8_MEMBER( read );
DECLARE_WRITE8_MEMBER( write );
DECLARE_WRITE_LINE_MEMBER( md_w );
DECLARE_WRITE_LINE_MEMBER( stb_w );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
private:
devcb_write_line m_write_irq;
devcb_read8 m_read_di;
devcb_write8 m_write_do;
int m_md; // mode
int m_stb; // strobe
UINT8 m_data; // data latch
};
// device type definition
extern const device_type I8212;
#endif
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