Exercise

How many times does the following LOOP instruction will be executed?

$1.$

MOV CX$,2$

L$1$:

LOOP L$1$

$3.$

MOV CX$,1$

SHLCX$,2$

L$3$:

LOOP L$3$

ADD CX$,12$

$2.$

MOV CX$,16$

L$2$:

SUB CX$,3$

Loop L$2$

$4.$

L$4$:

MOV CX$,10$

LOOP L$4$

Exercise

What is the value in the $Ax$ register after the following sequence of instructions are executed?

$1.$

MOV AL$,2$

MOV AH$,3$

MOV BL$,10$

MUL BL

MOV AL$,02H$

MOV AH$,08H$

ADD AH$,$ AL

$2.$

MOVZXAX, OCH

MOVSX BX$,03H$

DIV BL

$4.$

MOV AX$,10$

MOV BX$,12$

SUB BX$,$ AX

MOV AX$,$ BX

$37$