Emulates a MIPS R2000/R3000 processor in software. Useful for students who are taught MIPS R2000/R3000 assembly.

SPIM S20 is a software simulator that runs assembly language programs for the MIPS R2000/R3000 RISC computers. SPIM can read and immediately run files containing assembly language statements. SPIM is a self-contained system for running these programs and contains a debugger and interface to the operating system.