This thesis presents the process of creating disassembler for new designed processors. We demand automatic generation of the disassembler. Instruction set for processor is modeled by specialized language ISAC, which offers resources for description of the instruction set. For example it describes format of instruction in the assembly language or format of instruction in the binary form or behavior of this instruction. Internal model is coupled finite automata, which describes relation of textual form of the instruction and binary form of the instruction in formal way. The code of disassembler is generated from the internal model. This disassembler accepts program in binary code at the input and generate equivalent program in assembly langua...