Emulating 6502
The author discusses a shift to retrocomputing, focusing on the MOS 6502 CPU, its architecture, and building gaming hardware, while developing an emulator tested with the Apple I computer.
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The author reflects on a shift in their programming interests, moving from routine tasks to engaging in "useless" programming projects, particularly in retrocomputing. This journey began with the MOS 6502 CPU, a foundational component in many 8-bit computers. The author describes their experiences attending retrocomputing festivals, building an arcade cabinet, and designing a handheld gaming console. The article delves into the architecture of the 6502, detailing its registers, memory layout, and unique addressing modes. The CPU features a simple instruction set with 56 opcodes, allowing for straightforward emulation. The author outlines the process of creating an emulator in Python, including memory management and instruction execution. They also introduce the Apple I computer as a test case for the emulator, highlighting its specifications and the significance of its monitor program, WozMon. The article serves as both a personal narrative and a technical guide for those interested in retro programming and emulation.
- The author shifted focus from routine programming to retrocomputing projects.
- The MOS 6502 CPU is central to many classic 8-bit computers and is highlighted for its simplicity.
- The article provides a technical overview of the 6502's architecture and instruction set.
- The author shares their experiences building retro gaming hardware and attending related events.
- The Apple I computer is used as a practical example for testing the emulator being developed.
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