Computer processors

Question 1

(a) This is the ‘LOAD’ instruction

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(b) I deduced this from the fact that the sole purpose TAR register is to hold the address of the location in data memory that is to be written to during a store instruction or read from during a load instruction.

Question 2

 (a) The rB register is the loop counter

(b) The instructions will be executed 100 times.

(c) The lowest address is 0500. The highest address is 0564.

(d) It is used to initialize the r1 register to zero.

(e) The subroutine indirectly increments a word at a memory address pointed to by the r1 register.

 

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