Assembly Language Final Exam

Assembly Language Final Exam




- answers✔✔What is the largest positive value that may be stored in 20 bits?



Precise control timing

Optimize memory - answers✔✔Why learn assembly language?



0A5h - answers✔✔myBytes BYTE 80h,66h,0A5h

mov al,myBytes

add al,[myBytes+2]



Evaluation of al?



6600 - answers✔✔array WORD 8000h,6600h,4400h

mov ax,array

add ax,[array+2]



Evaluation of ax?



0 to 255

0 to (2^8 - 1) - answers✔✔Unsigned Byte Range

, 0 to (2^16 - 1) - answers✔✔Unsigned word range



0 to (2^32 - 1) - answers✔✔Unsigned doubleword range



- 128 to + 127

- 2^7 to (2^7 - 1) - answers✔✔Signed byte range



- 2^15 to (2^15 - 1) - answers✔✔Signed word range



- 2^31 to (2^31 - 1) - answers✔✔Signed doubleword range



Repeatedly divide the decimal value by 16. Each remainder is a hexadecimal digit.

(Last remainder obtained is the first hexadecimal digit) - answers✔✔Converting from unsigned
Decimal to Hexadecimal



Repeatedly divide the decimal value by 2. Each remainder is a binary digit.(Last remainder
obtained is the first binary digit)" - answers✔✔Convert Unsigned Decimal to Binary



Invert bits.

Add 1 - answers✔✔Obtaining 2's complement notation



MSB ≤ 7 - answers✔✔Hexadecimal number is positive if:



MSB ≥ 8 - answers✔✔Hexadecimal number is negative if:



1. Convert absolute value of the decimal to binary.