This is a simulated version of a CPU, assembler, and LRU cache for the E20 assembly language written in C++.
E20 is an assembly language used as a pedagogical tool in computer architecture by Professor Epstein at NYU Tandon School of Engineering. This was a semester-long project done in Spring 2021. It consists of 3 cpp files and one header file.
The first program to be run is asm.cpp and it takes in a .s file containing a program written in E20. It assembles this into machine code and outputs a .bin file containing the program. An example of this can be found here. The next program to be run is sim.cpp, which takes in a .bin file containing E20 program instructions and executes it. It prints out the final state of all 7 registers, as well as the program counter and a portion of all the memory in hex. An example of this can be found here. The third program is simcache.cpp which includes LRUCache.h and also takes a .bin file as its input, as well as a cache size, associativity, and blocksize in bytes. It can simulate the effects of one or two caches. It simulates the performance effect of an LRU (Least Recently Used) cache on a given E20 program, by cataloging and printing out the cache hits and misses for each attempted memory access by the program. An example of that can be found here.
This was compiled using gcc 9.3.0 and run on Linux.