Reverse Polish to Infix

Convert the following formulas from reverse Polish to infix: a. AB + C + D x b. AB/CD/ + c. ABCDE + x x / d. ABCDE + F/ + G – H/x +

Infix to Reverse Polish

Convert the following formulas from infix to reverse Polish: a. A + B + C + D + E b. (A + B) x (C +D) + E c. (A x B) + (C x D) + E d. (A - B ) x (((C-D x E)/F)/G) x H

ref8) Instructions loading for 1 address machine

Given the following memory values and a one-address machine with an accumulator, what values do the following instructions load into the accumulator?  Word 20 contains 40.  Word 30 contains 50.  Word 40 contains 60.  Word 50 contains 70. a. LOAD IMMEDIATE 20 b. LOAD DIRECT 20 c. LOAD INDIRECT 20 d. LOAD IMMEDIATE 30 e. LOAD DIRECT 30 f. LOAD INDIRECT 30

ref9)

An address field in an instruction contains decimal value 14. Where is the corresponding operand located for a. immediate addressing? b. direct addressing? c. indirect addressing? d. register addressing? e. register indirect addressing?

ref11) Stack elements and Instructions

Assume a stack-oriented processor that includes the stack operations PUSH and POP. Arithmetic operations automatically involve the top one or two stack elements. Begin with an empty stack. What stack elements remain after the following instructions are executed? PUSH 4 PUSH 7 PUSH 8 ADD PUSH 10 SUB MUL