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/***************************************************************************
Intel 8259A
Programmable Interrupt Controller
_____ _____
_CS 1 |* \_/ | 28 VCC
_WR 2 | | 27 A0
_RD 3 | | 26 _INTA
D7 4 | | 25 IR7
D6 5 | | 24 IR6
D5 6 | | 23 IR5
D4 7 | 8259A | 22 IR4
D3 8 | | 21 IR3
D2 9 | | 20 IR2
D1 10 | | 19 IR1
D0 11 | | 18 IR0
CAS0 12 | | 17 INT
CAS1 13 | | 16 _SP/_EN
GND 14 |_____________| 15 CAS2
***************************************************************************/
#ifndef __PIC8259_H__
#define __PIC8259_H__
#include "devlegcy.h"
#include "devcb.h"
class pic8259_device : public device_t
{
public:
pic8259_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
~pic8259_device() { global_free(m_token); }
// access to legacy token
void *token() const { assert(m_token != NULL); return m_token; }
protected:
// device-level overrides
virtual void device_config_complete();
virtual void device_start();
virtual void device_reset();
private:
// internal state
void *m_token;
};
extern const device_type PIC8259;
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
struct pic8259_interface
{
/* Called when int line changes */
devcb_write_line out_int_func;
/* 1 - when master, 0 - when slave */
devcb_read_line sp_en_func;
/* Called when on master slave irq is trigered*/
devcb_read8 read_slave_ack_func;
};
/***************************************************************************
DEVICE CONFIGURATION MACROS
***************************************************************************/
#define MCFG_PIC8259_ADD(_tag, _intrf) \
MCFG_DEVICE_ADD(_tag, PIC8259, 0) \
MCFG_DEVICE_CONFIG(_intrf)
/* device interface */
READ8_DEVICE_HANDLER( pic8259_r );
WRITE8_DEVICE_HANDLER( pic8259_w );
int pic8259_acknowledge(device_t *device);
/* interrupt requests */
WRITE_LINE_DEVICE_HANDLER( pic8259_ir0_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir1_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir2_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir3_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir4_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir5_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir6_w );
WRITE_LINE_DEVICE_HANDLER( pic8259_ir7_w );
#endif /* __PIC8259_H__ */
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