libmsx/interrupt_8h_source.html

// -*- coding: utf-8-unix -*-

/*

 * Copyright (c) 2021-2025 Daishi Mori (mori0091)

 *

 * This software is released under the MIT License.\n

 * See https://github.com/mori0091/libmsx/blob/main/LICENSE

 *

 * GitHub libmsx project\n

 * https://github.com/mori0091/libmsx

 */

#pragma once


#ifndef INTERRUPT_H

#define INTERRUPT_H


#include <stdbool.h>

#include <stdint.h>


extern volatile bool vsync_busy;


#define await_interrupt()                       \

  __asm__("ei");                                \

  __asm__("halt")


void await_vsync(void);


void set_interrupt_handler(void (*handler)(void));


void set_vsync_handler(void (*handler)(void));


void sleep_ticks(uint16_t ticks);


void sleep_millis(uint16_t ms);


bool get_interrupt_state(void);


#endif

await_vsync
void await_vsync(void)
MSX Waits for next VSYNC interrupt.

vsync_busy
volatile bool vsync_busy
MSX "Busy" flag for VSYNC interrupt routine.

set_interrupt_handler
void set_interrupt_handler(void(*handler)(void))
MSX Register user defined interrupt handler.

set_vsync_handler
void set_vsync_handler(void(*handler)(void))
MSX Register user defined VSYNC interrupt handler.

sleep_millis
void sleep_millis(uint16_t ms)
MSX Wait for the specified time to elapse in milliseconds.

sleep_ticks
void sleep_ticks(uint16_t ticks)
MSX Wait for the specified number of VSYNCs to occur.

get_interrupt_state
bool get_interrupt_state(void)
MSX Return the current state of interrupts.