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// license:BSD-3-Clause
// copyright-holders:Curt Coder,AJR
/**********************************************************************
Intel 8212/3212 8-Bit Input/Output Port (Multi-Mode Latch Buffer)
**********************************************************************
_____ _____
_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 | 3212 | 18 DI6
DO3 8 | | 17 DO6
DI4 9 | | 16 DI5
DO4 10 | | 15 DO5
STB 11 | | 14 _CLR
GND 12 |_____________| 13 DS2
**********************************************************************/
#ifndef MAME_MACHINE_I8212_H
#define MAME_MACHINE_I8212_H
#pragma once
class i8212_device : public device_t
{
enum class mode : u8
{
INPUT,
OUTPUT
};
public:
// construction/destruction
i8212_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock = XTAL());
auto int_wr_callback() { return m_write_int.bind(); }
auto di_rd_callback() { return m_read_di.bind(); }
auto do_wr_callback() { return m_write_do.bind(); }
auto md_rd_callback() { return m_read_md.bind(); }
// data read handlers
uint8_t read();
IRQ_CALLBACK_MEMBER(inta_cb);
// data write handlers
void write(uint8_t data);
void strobe(uint8_t data);
// line write handlers
DECLARE_WRITE_LINE_MEMBER(stb_w);
protected:
// device-level overrides
virtual void device_start() override;
virtual void device_reset() override;
private:
// helpers
mode get_mode();
devcb_write_line m_write_int;
devcb_read8 m_read_di;
devcb_write8 m_write_do;
devcb_read_line m_read_md;
int m_stb; // strobe
uint8_t m_data; // data latch
};
// device type definition
DECLARE_DEVICE_TYPE(I8212, i8212_device)
#endif // MAME_MACHINE_I8212_H
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