6502-emulator 【2025】

Building a is a classic rite of passage for systems programmers. The MOS 6502 was the brain of iconic systems like the Apple II , Commodore 64 , and NES . Its simple architecture—featuring only 56 base instructions and 6 registers—makes it one of the best CPUs to emulate for learning purposes. 1. Architecture Basics

Locations where the CPU looks for jump addresses when it resets or receives a signal. 2. The Emulation Loop The core of your emulator is a "Fetch-Decode-Execute" loop: Emulating a CPU in C++ (6502) 6502-emulator

Holds the current stack location (usually at address $0100 ). (Status Register) Stores flags: Carry, Zero, Negative, Overflow, etc.. Building a is a classic rite of passage

Special high-speed memory area used like extra registers. Stack ($0100–$01FF): Fixed location for the system stack. The Emulation Loop The core of your emulator