Question

compare the register memory, accumulator based and memory memory architectures by writing the assembly programs to perform the calculation F =(B+C)/A

Answer 1

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Register Memory Architecture

Expression: F = (B+C)/A
R1, R2 are registers
M[] is any memory location

MOV	R1, B	R1 = M[B]
ADD	R1, C	R1 = R1 + M[C]
MOV	R2, A	R2 = A
DIV	R1, R2	R1 = R1 / R2

Accumulator Based
Expression: F = (B+C)/A
AC is accumulator
M[] is any memory location
M[T] is temporary location

LOAD	B	AC = M[B]
ADD	C	AC = AC + M[C]
DIV	A	AC= AC/A
STORE	F	M[F] = AC

Memory Memory
Expression: F = (B+C)/A
M[] is any memory location

ADD	X,B,C	M[X]= M[B]+ M[C]
DIV	E,X,A	M[E] = M[X] / M[A]
STORE	F	M[F]= M[E]