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Attempted move to a "BUS" oriented memory architecture (TBC!)

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Signed-off-by: Adrian.Conlon <adrian.conlon@arup.com>
This commit is contained in:
Adrian.Conlon
2017-09-06 13:22:23 +01:00
parent 8d91260f84
commit 64b7335a79
15 changed files with 238 additions and 199 deletions
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47
src/Memory.cpp
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@@ -1,55 +1,8 @@
#include "stdafx.h"
#include "Memory.h"
#include "Processor.h"
#include <iostream>
#include <fstream>
#include <algorithm>
EightBit::Memory::Memory(uint16_t addressMask)
: m_addressMask(addressMask),
m_temporary(0),
m_data(nullptr) {
clear();
m_address.word = 0;
m_bus.resize(0x10000);
m_locked.resize(0x10000);
}
uint8_t EightBit::Memory::peek(uint16_t address) {
bool rom;
return reference(address, rom);
}
void EightBit::Memory::poke(uint16_t address, uint8_t value) {
bool rom;
reference(address, rom) = value;
}
uint16_t EightBit::Memory::peekWord(uint16_t address) {
register16_t returned;
returned.low = peek(address);
returned.high = peek(address + 1);
return returned.word;
}
void EightBit::Memory::clear() {
std::fill(m_bus.begin(), m_bus.end(), 0);
std::fill(m_locked.begin(), m_locked.end(), false);
}
void EightBit::Memory::loadRom(const std::string& path, uint16_t offset) {
auto size = loadMemory(path, offset);
lock(offset, size);
}
void EightBit::Memory::loadRam(const std::string& path, uint16_t offset) {
loadMemory(path, offset);
}
int EightBit::Memory::loadMemory(const std::string& path, uint16_t offset) {
return loadBinary(path, m_bus, offset, 0x10000 - offset);
}
int EightBit::Memory::loadBinary(const std::string& path, std::vector<uint8_t>& output, int offset, int maximumSize) {
std::ifstream file;