emu.c

来自「日本的手持pda源码.wince下使用,完全开源」· C语言 代码 · 共 109 行

/*
 *  PocketGnuboy - GameBoy emulator for PocketPC
 *  Copyright (C) 2003  Y.Nagamidori
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 *  based on gnuboy 1.0.3
 *  Copyright (C) 2000-2001 Laguna and Gilgamesh
 */

#include "defs.h"
#include "regs.h"
#include "hw.h"
#include "cpu.h"
#include "mem.h"
#include "lcd.h"
#include "stdlib.h"
#include "rtc.h"

static const int framelen = 16743;
static int emu_run = 0;
static int init = 0;

void emu_reset();
void emu_pause();
void emu_step();

void emu_init()
{
	vid_init();
	pcm_init();
	emu_reset();
}

void emu_close()
{
	vid_close();
	pcm_close();
	loader_unload();

	emu_run = 0;
}

void emu_reset()
{
	sram_save();
	rtc_save();

	hw_reset();
	lcd_reset();
	cpu_reset();
	mbc_reset();
	sound_reset();

	init = 0;
}

void emu_pause()
{
	emu_run = 0;
	vid_suspend();
	pcm_suspend();
	joy_close();
}

void emu_resume()
{
	emu_run = 1;
	vid_resume();
	pcm_resume();
	joy_init();
}

int emu_get_run()
{
	return emu_run;
}

INLINE void emu_step()
{
	cpu_emulate(cpu.lcdc);
}

void emu_do_frame()
{
	vid_start_frame();
	vid_begin();
	cpu_emulate();
	vid_end();
	joy_process();
	rtc_tick();
	sound_mix();
	pcm_submit();

	vid_end_frame();
}