The content of AC in the basic computer is hexadecimal B862 and the initial valu

Question

The content of AC in the basic computer is hexadecimal B862 and the initial value of E is 0. Determine the contents of AC, E, PC, AR, and IR in hexadecimal in the independent register–reference instructions from in the table below. The initial value of PC is hexadecimal 071.

Each instruction should start with the initial conditions.

E

AC

PC

AR

IR

Initial

0

B862

071

-

-

CLA

CLE

CMA

SPA

I guess this is multiple questions? If so please just help me with the first row so I have a basis of understanding what this is looking for... If this does not get answered I guess I will re-present it in a single question format, I just don't understand what clearing the AC will do to the other values. Any help given to better understand will get a perfect review, thanks!

E

AC

PC

AR

IR

Initial

0

B862

071

-

-

CLA

CLE

CMA

SPA

Explanation / Answer

Execute CLA (Instruction code B862)
PC=071
AR<-PC          :+>(AR)=(PC)=071h
IR<-M[AR],PC<-PC+1 ; => (IR)=7800h, (PC) = 072h

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