register.cc

来自「AVR 单片机程序设计用到的模拟器」· CC 代码 · 共 45 行

/* $Id: Register.cc,v 1.3 2000/09/27 09:53:16 pure Exp $ */

#include "Register.h"

ByteReg::ByteReg(Storage& _storage, unsigned _addr) : storage(_storage)
{
	addr = _addr;
}

ByteReg::~ByteReg()
{
}

ByteReg::operator byte()
{
	return storage.readb(addr);
}

ByteReg& ByteReg::operator= (byte value)
{
	storage.writeb(addr, value);
	return *this;
}

WordReg::WordReg(Storage& _storage, unsigned _addr) : storage(_storage)
{
	addr = _addr;
}

WordReg::~WordReg()
{
}

WordReg::operator word()
{
	return storage.readb(addr) | (((word)storage.readb(addr+1))<<8);
}

WordReg& WordReg::operator= (word value)
{
	storage.writeb(addr, value & 0xff);
	storage.writeb(addr+1, value >> 8);
	return *this;
}