Our mini project is on assembler.We are making an assembler which will convert high level instructions into machine instruction and it will load our objeect program in memory.There are so many hypothetical machines like SIC,SIC/XE etc.We are creating a new hypothetical machine which will perform the task of assembler.In order to make our project we are following 2 algorithms which are described below: pass 1 pass 2 pass 1 algorithm is used for creating symbol table,generating addresses,generating opcode. pass 2 algorithm is used for creating object program. We have to load our object program into memory. we are considering a relocatable object program.