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/***************************************************************************
National Semiconductor INS8154
license: MAME, GPL-2.0+
copyright-holders: Dirk Best
N-Channel 128-by-8 Bit RAM Input/Output (RAM I/O)
_____ _____
PB6 1 |* \_/ | 40 VCC
PB5 2 | | 39 PB7
PB4 3 | | 38 NWDS
PB3 4 | | 37 NRDS
PB2 5 | | 36 NRST
PB1 6 | | 35 _CS0
PB0 7 | | 34 CS1
DB7 8 | | 33 M/_IO
DB6 9 | | 32 AD6
DB5 10 | INS8154 | 31 AD5
DB4 11 | | 30 AD4
DB3 12 | | 29 AD3
DB2 13 | | 28 AD2
DB1 14 | | 27 AD1
DB0 15 | | 26 AD0
PA7 16 | | 25 INTR
PA6 17 | | 24 PA0
PA5 18 | | 23 PA1
PA4 19 | | 22 PA2
GND 20 |_____________| 21 PA3
***************************************************************************/
#pragma once
#ifndef __INS8154_H__
#define __INS8154_H__
#include "emu.h"
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_INS8154_IN_A_CB(_devcb) \
devcb = &ins8154_device::set_in_a_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8154_OUT_A_CB(_devcb) \
devcb = &ins8154_device::set_out_a_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8154_IN_B_CB(_devcb) \
devcb = &ins8154_device::set_in_b_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8154_OUT_B_CB(_devcb) \
devcb = &ins8154_device::set_out_b_callback(*device, DEVCB_##_devcb);
#define MCFG_INS8154_OUT_IRQ_CB(_devcb) \
devcb = &ins8154_device::set_out_irq_callback(*device, DEVCB_##_devcb); //currently unused
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
// ======================> ins8154_device
class ins8154_device : public device_t
{
public:
// construction/destruction
ins8154_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
template<class _Object> static devcb_base &set_in_a_callback(device_t &device, _Object object) { return downcast<ins8154_device &>(device).m_in_a_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_a_callback(device_t &device, _Object object) { return downcast<ins8154_device &>(device).m_out_a_cb.set_callback(object); }
template<class _Object> static devcb_base &set_in_b_callback(device_t &device, _Object object) { return downcast<ins8154_device &>(device).m_in_b_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_b_callback(device_t &device, _Object object) { return downcast<ins8154_device &>(device).m_out_b_cb.set_callback(object); }
template<class _Object> static devcb_base &set_out_irq_callback(device_t &device, _Object object) { return downcast<ins8154_device &>(device).m_out_irq_cb.set_callback(object); }
DECLARE_READ8_MEMBER( ins8154_r );
DECLARE_WRITE8_MEMBER( ins8154_w );
DECLARE_WRITE8_MEMBER( ins8154_porta_w );
DECLARE_WRITE8_MEMBER( ins8154_portb_w );
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_post_load() { }
virtual void device_clock_changed() { }
private:
/* i/o lines */
devcb_read8 m_in_a_cb;
devcb_write8 m_out_a_cb;
devcb_read8 m_in_b_cb;
devcb_write8 m_out_b_cb;
devcb_write_line m_out_irq_cb;
/* registers */
UINT8 m_in_a; /* Input Latch Port A */
UINT8 m_in_b; /* Input Latch Port B */
UINT8 m_out_a; /* Output Latch Port A */
UINT8 m_out_b; /* Output Latch Port B */
UINT8 m_mdr; /* Mode Definition Register */
UINT8 m_odra; /* Output Definition Register Port A */
UINT8 m_odrb; /* Output Definition Register Port B */
};
// device type definition
extern const device_type INS8154;
#endif /* __INS8154_H__ */
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