GarbAGE (Garbage Accurate GameBoy Emulator)
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

91 lines
1.9 KiB

/*
* Copyright (C) 2022 Riyyi
* Copyright (C) 2022 Th3FrankXD
*
* SPDX-License-Identifier: MIT
*/
#pragma once
#include <cstdint> // int8_t, int32_t, uint8_t, uint32_t
#include <functional> // std::function
#include <unordered_map>
#include "processing-unit.h"
class CPU final : public ProcessingUnit {
public:
explicit CPU(uint32_t frequency);
virtual ~CPU();
void update() override;
// -------------------------------------
// Arithmetic and Logic Instructions
// 8-bit
void add();
// 16-bit
// -------------------------------------
// Bit Operations Instructions
// -------------------------------------
// Bit Shift Instructions
// -------------------------------------
// Load Instructions
// 8-bit
void ld8();
void ldh8();
// 16-bit
void ld16();
// -------------------------------------
// Jumps and Subroutines
void jp16();
// -------------------------------------
// Stack Operations Instructions
// -------------------------------------
// Miscellaneous Instructions
private:
uint32_t pcRead();
uint32_t pcRead16() { return pcRead() | (pcRead() << 8); }
void write(uint32_t address, uint32_t value);
uint32_t read(uint32_t address);
void ffWrite(uint32_t address, uint32_t value);
uint32_t ffRead(uint32_t address);
uint32_t bc() const { return m_b << 8 | m_c; }
uint32_t de() const { return m_b << 8 | m_c; }
uint32_t hl() const { return m_b << 8 | m_c; }
// Registers
uint32_t m_a { 0 }; // Accumulator
uint32_t m_b { 0 }; // B
uint32_t m_c { 0 }; // C
uint32_t m_d { 0 }; // D
uint32_t m_e { 0 }; // E
uint32_t m_h { 0 }; // H
uint32_t m_l { 0 }; // L
uint32_t m_pc { 0 }; // Program Counter
uint32_t m_sp { 0 }; // Stack Pointer
// Flags
uint32_t m_zf { 0 }; // Zero flag
uint32_t m_nf { 0 }; // Subtraction flag (BCD)
uint32_t m_hf { 0 }; // Half Carry flag (BCD)
uint32_t m_cf { 0 }; // Carry flag
int8_t m_wait_cycles { 0 };
};