Genesis-Plus-GX/source/z80/cpuintrf.h
2008-12-11 17:38:29 +00:00

60 lines
1.6 KiB
C

#ifndef CPUINTRF_H
#define CPUINTRF_H
#include "osd_cpu.h"
/* Interrupt line constants */
enum
{
/* line states */
CLEAR_LINE = 0, /* clear (a fired, held or pulsed) line */
ASSERT_LINE, /* assert an interrupt immediately */
HOLD_LINE, /* hold interrupt line until acknowledged */
PULSE_LINE, /* pulse interrupt line for one instruction */
/* internal flags (not for use by drivers!) */
INTERNAL_CLEAR_LINE = 100 + CLEAR_LINE,
INTERNAL_ASSERT_LINE = 100 + ASSERT_LINE,
/* input lines */
MAX_INPUT_LINES = 32+3,
INPUT_LINE_IRQ0 = 0,
INPUT_LINE_IRQ1 = 1,
INPUT_LINE_IRQ2 = 2,
INPUT_LINE_IRQ3 = 3,
INPUT_LINE_IRQ4 = 4,
INPUT_LINE_IRQ5 = 5,
INPUT_LINE_IRQ6 = 6,
INPUT_LINE_IRQ7 = 7,
INPUT_LINE_IRQ8 = 8,
INPUT_LINE_IRQ9 = 9,
INPUT_LINE_NMI = MAX_INPUT_LINES - 3,
/* special input lines that are implemented in the core */
INPUT_LINE_RESET = MAX_INPUT_LINES - 2,
INPUT_LINE_HALT = MAX_INPUT_LINES - 1,
/* output lines */
MAX_OUTPUT_LINES = 32
};
/* daisy-chain link */
typedef struct {
void (*reset)(int); /* reset callback */
int (*interrupt_entry)(int); /* entry callback */
void (*interrupt_reti)(int); /* reti callback */
int irq_param; /* callback paramater */
} Z80_DaisyChain;
#define Z80_MAXDAISY 4 /* maximum of daisy chan device */
#define Z80_INT_REQ 0x01 /* interrupt request mask */
#define Z80_INT_IEO 0x02 /* interrupt disable mask(IEO) */
#define Z80_VECTOR(device,state) (((device)<<8)|(state))
#endif /* CPUINTRF_H */