: A digital computer has a memory unit with $32$ bits per word. The instruction set consists of $110$ different operations. All instructions have an operation code part $($opcode$)$ and two address fields: one for a memory address and one for a register address. This particular system includes eight general$-$purpose, user$-$addressable registers. Registers may be loaded directly from memory, and memory may be updated directly from the registers. Direct memory$-$to$-$memory data movement operations are not supported. Each instruction is stored in one word of memory.