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/**********************************************************************
Intel 8212 8-Bit Input/Output Port emulation
Copyright MESS Team.
Visit http://mamedev.org for licensing and usage restrictions.
**********************************************************************
_____ _____
_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_ADD(_tag, _config) \
MCFG_DEVICE_ADD((_tag), I8212, 0) \
MCFG_DEVICE_CONFIG(_config)
#define I8212_INTERFACE(name) \
const i8212_interface (name) =
///*************************************************************************
// TYPE DEFINITIONS
///*************************************************************************
// ======================> i8212_interface
struct i8212_interface
{
devcb_write_line m_out_int_cb;
devcb_read8 m_in_di_cb;
devcb_write8 m_out_do_cb;
};
// ======================> i8212_device
class i8212_device : public device_t, public i8212_interface
{
public:
// construction/destruction
i8212_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
DECLARE_READ8_MEMBER( data_r );
DECLARE_WRITE8_MEMBER( data_w );
DECLARE_WRITE_LINE_MEMBER( md_w );
DECLARE_WRITE_LINE_MEMBER( stb_w );
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
private:
devcb_resolved_write_line m_out_int_func;
devcb_resolved_read8 m_in_di_func;
devcb_resolved_write8 m_out_do_func;
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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