mirror of
https://github.com/holub/mame
synced 2025-05-23 06:08:48 +03:00
2d6453c98a
Added preliminary LD-V1000 emulation. Not fully working yet, but mostly there. Cleaned up and normalized the three existing laserdisc emulations. Removed obsolete code from the laserdisc core.
71 lines
2.0 KiB
C
71 lines
2.0 KiB
C
/***************************************************************************
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z80daisy.h
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Z80/180 daisy chaining support functions.
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***************************************************************************/
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#pragma once
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#ifndef __Z80DAISY_H__
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#define __Z80DAISY_H__
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#include "devintrf.h"
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/***************************************************************************
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CONSTANTS
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***************************************************************************/
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/* these constants are returned from the irq_state function */
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#define Z80_DAISY_INT 0x01 /* interrupt request mask */
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#define Z80_DAISY_IEO 0x02 /* interrupt disable mask (IEO) */
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enum
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{
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DEVINFO_FCT_IRQ_STATE = DEVINFO_FCT_DEVICE_SPECIFIC, /* R/O: z80_daisy_irq_state */
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DEVINFO_FCT_IRQ_ACK, /* R/O: z80_daisy_irq_ack */
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DEVINFO_FCT_IRQ_RETI /* R/O: z80_daisy_irq_reti */
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};
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/***************************************************************************
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TYPE DEFINITIONS
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***************************************************************************/
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/* per-device callback functions */
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typedef int (*z80_daisy_irq_state)(const device_config *device);
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typedef int (*z80_daisy_irq_ack)(const device_config *device);
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typedef int (*z80_daisy_irq_reti)(const device_config *device);
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/* opaque internal daisy chain state */
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typedef struct _z80_daisy_state z80_daisy_state;
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/* daisy chain structure */
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typedef struct _z80_daisy_chain z80_daisy_chain;
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struct _z80_daisy_chain
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{
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device_type devtype; /* type of device */
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const char * devname; /* name of the device */
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};
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/***************************************************************************
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FUNCTION PROTOTYPES
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***************************************************************************/
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z80_daisy_state *z80daisy_init(running_machine *machine, const char *cputag, const z80_daisy_chain *daisy);
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void z80daisy_reset(z80_daisy_state *daisy);
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int z80daisy_update_irq_state(z80_daisy_state *chain);
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int z80daisy_call_ack_device(z80_daisy_state *chain);
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void z80daisy_call_reti_device(z80_daisy_state *chain);
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#endif
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