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

yes,

1 address instruction

right?

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

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Yes it is 1 address intn .

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

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yes, got it here

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