storage.cc

来自「AVR 单片机程序设计用到的模拟器」· CC 代码 · 共 43 行

/* $Id: Storage.cc,v 1.5 2000/09/24 12:15:43 pure Exp $ */

#include <iostream.h>
#include "Storage.h"

Storage::Storage(unsigned _base, unsigned _size, unsigned _wait) : 
Device(_wait)
{
	base = _base;
	size = _size;
	mem = new byte[_size];
}

Storage::~Storage()
{
	delete mem;
}

Device* Storage::cs(unsigned addr)
{
	if ((addr >= base) && (addr < base+size)) 
	    return (Device*)this;
	return (Device *) 0;
}

byte Storage::readb(unsigned addr)
{
	if (cs(addr)) { 
		return mem[addr - base];
	}
	cerr << __FILE__ << ": reading from illegal address " << hex << addr << endl;	
	return 0;
}

void Storage::writeb(unsigned addr, byte data)
{
	if (cs(addr)) {
	    	mem[addr - base] = data;
	    	return;
	}
	cerr << __FILE__ << ": writing to illegal address " << hex << addr << endl;
}