I need to program a Java assembler which interprets the KEN16 instruction set.

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Instruction Operand(s) LDM reg, addr LDV ADD reg, val dreg, sreg Effect Load the value in memory[addr] into reg. Load the value val into reg. Add the value in register sreg to the value in register dreg, leaving the result in dreg. SUB MUL STM INC DEC dreg, sreg dreg, sreg reg, addr reg reg Subtract the value in register sreg from the value in register dreg, leaving the result in dreg. Multiply the value in register dreg by the value in register sreg, leaving the result in dreg. Store the value in register reg into memory[addr] Add 1 to the value in register reg using 2's complement arithmetic. Subtract 1 from the value in register reg using 2's complement arithmetic. Store the instruction address represented by label lab in the program counter. Store the instruction address represented by JMP lab JEZ lab, reg