LS6502

What is LS 6502 ? The LS 6502 project is a realization of the very famous MOS 6502 processor on the Logisim logic simulator. This processor, being famous, marked the era of computers and game consoles in the 80s. As an example, the Apple II, Commodore 64, and BBC Micro computers were all based on 6502 processors. Many very popular game consoles also used this processor, such as the Atari 2600, Nintendo Entertainment System (NES), and Atari Lynx. How the LS 6502 whas implemented ? The implementation was done on the Logisim logic simulator (the stand-alone processor image below). A simulator normally intended for academic use for small projects, and not complete processors. Despite this, the simulator normally manages to run this processor, with a fairly high number of elementary components exceeding 2500. The implementation was a from scratch build, meaning that the pre-built components of the Logisim library were avoided as much as possible, and that most of the parts were built at low level with only logic gates and flip-flops, except perhaps for memories like RAM and ROM. Testing the LS 6502