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/***************************************************************************
Zilog Z80 Parallel Input/Output Controller implementation
Copyright Nicola Salmoria and the MAME Team.
Visit http://mamedev.org for licensing and usage restrictions.
***************************************************************************
_____ _____
D2 1 |* \_/ | 40 D3
D7 2 | | 39 D4
D6 3 | | 38 D5
_CE 4 | | 37 _M1
C/_D 5 | | 36 _IORQ
B/_A 6 | | 35 RD
PA7 7 | | 34 PB7
PA6 8 | | 33 PB6
PA5 9 | | 32 PB5
PA4 10 | Z8420 | 31 PB4
GND 11 | | 30 PB3
PA3 12 | | 29 PB2
PA2 13 | | 28 PB1
PA1 14 | | 27 PB0
PA0 15 | | 26 +5V
_ASTB 16 | | 25 CLK
_BSTB 17 | | 24 IEI
ARDY 18 | | 23 _INT
D0 19 | | 22 IEO
D1 20 |_____________| 21 BRDY
***************************************************************************/
#ifndef __Z80PIO__
#define __Z80PIO__
/***************************************************************************
MACROS / CONSTANTS
***************************************************************************/
#define Z80PIO DEVICE_GET_INFO_NAME(z80pio)
#define MDRV_Z80PIO_ADD(_tag, _clock, _intrf) \
MDRV_DEVICE_ADD(_tag, Z80PIO, _clock) \
MDRV_DEVICE_CONFIG(_intrf)
#define Z80PIO_INTERFACE(_name) \
const z80pio_interface (_name) =
/***************************************************************************
TYPE DEFINITIONS
***************************************************************************/
typedef struct _z80pio_interface z80pio_interface;
struct _z80pio_interface
{
devcb_write_line out_int_func;
devcb_read8 in_pa_func;
devcb_write8 out_pa_func;
devcb_write_line out_ardy_func;
devcb_read8 in_pb_func;
devcb_write8 out_pb_func;
devcb_write_line out_brdy_func;
};
/***************************************************************************
PROTOTYPES
***************************************************************************/
DEVICE_GET_INFO( z80pio );
/* control register access */
READ8_DEVICE_HANDLER( z80pio_c_r );
WRITE8_DEVICE_HANDLER( z80pio_c_w );
/* data register access */
READ8_DEVICE_HANDLER( z80pio_d_r );
WRITE8_DEVICE_HANDLER( z80pio_d_w );
/* register access */
READ8_DEVICE_HANDLER( z80pio_cd_ba_r );
WRITE8_DEVICE_HANDLER( z80pio_cd_ba_w );
READ8_DEVICE_HANDLER( z80pio_ba_cd_r );
WRITE8_DEVICE_HANDLER( z80pio_ba_cd_w );
/* port access */
READ8_DEVICE_HANDLER( z80pio_pa_r );
WRITE8_DEVICE_HANDLER( z80pio_pa_w );
READ8_DEVICE_HANDLER( z80pio_pb_r );
WRITE8_DEVICE_HANDLER( z80pio_pb_w );
/* ready */
READ_LINE_DEVICE_HANDLER( z80pio_ardy_r );
READ_LINE_DEVICE_HANDLER( z80pio_brdy_r );
/* strobe */
WRITE_LINE_DEVICE_HANDLER( z80pio_astb_w );
WRITE_LINE_DEVICE_HANDLER( z80pio_bstb_w );
#endif
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