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