Unit5

Op-Code Operand Description

1 RXY LOAD the register R with the bit pattern found in the memory cell whose address is XY

2 RXY LOAD the register R with the bit XY

3 RXY STORE the bit pattern found in register R in the memory cell whose address is XY

4 0RS MOVE the bit pattern found in register R to register S

5 RST ADD the bit patterns in registers S and T as though they were two’s complement representations and leave the result in register R

6 RST ADD the bit patterns in registers S and T as though they represented values in floating-point notation and leave the result in register R

7 RST OR the bit pattern in registers S and T and place the result in register R

8 RST AND the bit patterns in register S and T and place the result in register R

9 RST Exclusive OR the bit patterns in registers S and T and place the result in register R

A R0X ROTATE the bit pattern in register R one bit to the right X times. Each time place the bit that started at the low-order end at the high-order end.

B RXY JUMP to the instruction located in the memory cell at address XY if the bit pattern in register R is equal to the bit pattern in register number 0. Otherwise, continue with the normal sequence of execution.

C 000 HALT execution