137 lines
3.1 KiB
C++
137 lines
3.1 KiB
C++
#include "stdafx.h"
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#include "../inc/Processor.h"
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EightBit::Processor::Processor(Bus& bus) noexcept
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: m_bus(bus) {
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}
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EightBit::Processor::Processor(const Processor& rhs) noexcept
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: ClockedChip(rhs),
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m_bus(rhs.m_bus) {
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RESET() = rhs.RESET();
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INT() = rhs.INT();
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PC() = rhs.PC();
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}
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DEFINE_PIN_LEVEL_CHANGERS(RESET, Processor)
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DEFINE_PIN_LEVEL_CHANGERS(INT, Processor)
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void EightBit::Processor::handleRESET() {
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raiseRESET();
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}
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void EightBit::Processor::handleINT() {
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raiseINT();
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}
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void EightBit::Processor::memoryWrite(const register16_t address, const uint8_t data) {
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BUS().ADDRESS() = address;
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memoryWrite(data);
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}
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void EightBit::Processor::memoryWrite(const register16_t address) {
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BUS().ADDRESS() = address;
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memoryWrite();
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}
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void EightBit::Processor::memoryWrite(const uint8_t data) {
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BUS().DATA() = data;
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memoryWrite();
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}
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void EightBit::Processor::memoryWrite() {
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busWrite();
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}
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void EightBit::Processor::busWrite() {
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BUS().write();
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}
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uint8_t EightBit::Processor::memoryRead(const register16_t address) {
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BUS().ADDRESS() = address;
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return memoryRead();
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}
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uint8_t EightBit::Processor::memoryRead() {
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return busRead();
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}
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uint8_t EightBit::Processor::busRead() {
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return BUS().read();
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}
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uint8_t EightBit::Processor::getBytePaged(const uint8_t page, const uint8_t offset) {
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return memoryRead(register16_t(offset, page));
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}
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void EightBit::Processor::setBytePaged(const uint8_t page, const uint8_t offset, const uint8_t value) {
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memoryWrite(register16_t(offset, page), value);
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}
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EightBit::register16_t EightBit::Processor::getWordPaged(register16_t address) {
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BUS().ADDRESS() = address;
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return getWordPaged();
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}
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EightBit::register16_t EightBit::Processor::getWordPaged(const uint8_t page, const uint8_t offset) {
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BUS().ADDRESS() = { offset, page };
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return getWordPaged();
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}
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void EightBit::Processor::setWordPaged(register16_t address, const register16_t value) {
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BUS().ADDRESS() = address;
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setWordPaged(value);
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}
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void EightBit::Processor::setWordPaged(const uint8_t page, const uint8_t offset, const register16_t value) {
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BUS().ADDRESS() = { offset, page };
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setWordPaged(value);
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}
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uint8_t EightBit::Processor::fetchByte() {
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return memoryRead(PC()++);
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}
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EightBit::register16_t EightBit::Processor::getWord(const register16_t address) {
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BUS().ADDRESS() = address;
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return getWord();
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}
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void EightBit::Processor::setWord(const register16_t address, const register16_t value) {
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BUS().ADDRESS() = address;
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setWord(value);
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}
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int EightBit::Processor::run(const int limit) noexcept {
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int current = 0;
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while (LIKELY(powered() && (current < limit)))
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current += step();
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return current;
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}
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void EightBit::Processor::execute(const uint8_t value) noexcept {
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opcode() = value;
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execute();
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}
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void EightBit::Processor::jump(const register16_t destination) noexcept {
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PC() = destination;
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}
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void EightBit::Processor::call(const register16_t destination) {
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pushWord(PC());
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jump(destination);
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}
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void EightBit::Processor::ret() {
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jump(popWord());
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}
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bool EightBit::Processor::operator==(const EightBit::Processor& rhs) const noexcept {
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return
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ClockedChip::operator==(rhs)
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&& RESET() == rhs.RESET()
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&& INT() == rhs.INT()
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&& PC() == rhs.PC();
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}
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