Dump of all my C++ emulators, only Intel8080 integrated so far...

Signed-off-by: Adrian.Conlon <adrian.conlon@gmail.com>
2026-04-21 17:16:35 +00:00 · 2017-06-04 21:38:34 +01:00
commit 105032f08a
67 changed files with 10430 additions and 0 deletions
@@ -0,0 +1,158 @@
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@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="utf-8"?>
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@@ -0,0 +1,4 @@
+#include "stdafx.h"
+#include "EventArgs.h"
+
+EightBit::EventArgs EightBit::EventArgs::m_empty;
@@ -0,0 +1,68 @@
+#include "stdafx.h"
+#include "Memory.h"
+#include "Processor.h"
+
+#include <iostream>
+#include <fstream>
+#include <algorithm>
+
+EightBit::Memory::Memory(uint16_t addressMask)
+: m_address(0),
+  m_addressMask(addressMask),
+  m_data(&(m_bus[m_address])) {}
+
+uint8_t EightBit::Memory::peek(uint16_t address) const {
+	return m_bus[address];
+}
+
+uint16_t EightBit::Memory::peekWord(uint16_t address) const {
+	auto low = peek(address);
+	auto high = peek(address + 1);
+	return Processor::makeWord(low, high);
+}
+
+EightBit::register16_t EightBit::Memory::getWord(uint16_t address) {
+	register16_t returned;
+	returned.low = get(address);
+	returned.high = get(address + 1);
+	return returned;
+}
+
+void EightBit::Memory::setWord(uint16_t address, register16_t value) {
+	set(address, value.low);
+	set(address + 1, value.high);
+}
+
+void EightBit::Memory::clear() {
+	m_bus.fill(0);
+	m_locked.fill(false);
+}
+
+void EightBit::Memory::loadRom(const std::string& path, uint16_t offset) {
+	auto size = loadMemory(path, offset);
+	std::fill(m_locked.begin() + offset, m_locked.begin() + offset + size, true);
+}
+
+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) {
+	std::ifstream file;
+	file.exceptions(std::ios::failbit | std::ios::badbit);
+
+	file.open(path, std::ios::binary | std::ios::ate);
+	auto size = (int)file.tellg();
+
+	size_t extent = size + offset;
+
+	if (extent > m_bus.size())
+		throw std::runtime_error("ROM cannot fit");
+
+	file.seekg(0, std::ios::beg);
+
+	file.read((char*)&m_bus[offset], size);
+	file.close();
+
+	return size;
+}
@@ -0,0 +1,29 @@
+#include "stdafx.h"
+#include "Processor.h"
+
+EightBit::Processor::Processor(Memory& memory)
+:	m_memory(memory),
+	cycles(0),
+	m_halted(false) {
+	pc.word = sp.word = 0;
+}
+
+void EightBit::Processor::reset() {
+	pc.word = 0;
+}
+
+void EightBit::Processor::initialise() {
+	sp.word = 0;
+	reset();
+}
+
+void EightBit::Processor::pushWord(register16_t value) {
+	sp.word -= 2;
+	setWord(sp.word, value);
+}
+
+EightBit::register16_t EightBit::Processor::popWord() {
+	auto value = getWord(sp.word);
+	sp.word += 2;
+	return value;
+}
@@ -0,0 +1 @@
+#include "stdafx.h"
@@ -0,0 +1,19 @@
+#ifdef _MSC_VER
+#pragma once
+#endif
+
+#include <cstdint>
+#include <functional>
+
+#include <iostream>
+#include <fstream>
+
+#include <string>
+#include <array>
+#include <vector>
+
+#if defined(_M_X64) || defined(_M_IX86 )
+#	define HOST_LITTLE_ENDIAN
+#else
+#	define HOST_BIG_ENDIAN
+#endif