Allen Career Institute:Computer Organization -Memory

Question

The size of instruction in a single accumulator CPU organization is $16$ bits. In order to evaluate the expressions given below. How much memory space (bytes) is required for storing the program? evaluate the expression from left to right).

Expression : $y=\frac{A-B+C}{E+F}$

Answer 1

accumulator CPU organization:   in this organization first ALU operend is always required in the accumulator and second operend is present either in register and memory . after the processing result is placed into a accumulator.

Eveluating left to right 

evaluating right to left 

 

 

Comments

Ans given 20B

---

why u always use memory?

like in F,X....

---

mam,i am assuming instn are present in memory.

---

i am evaluting right to left .i missed that point  evaluate the expression from left to right.

---

updating now

---

yes,

1 address instruction

right?

but if I take register instead of memory, then will not be required memory space will be less?

---

Yes it is 1 address intn .

Instn are always stored in memory . So by default we take always memory based instn

---

yes, got it here

https://www.geeksforgeeks.org/computer-organization-instruction-formats-zero-one-two-three-address-instruction/