assmbeler things

Question 1

מה זה IP בהקשר של אסמבלר?

Answer 1

instruction pointer.

מצביע למקום בזיכרון בו נימצאת הפקודה הבאה

Question 2

פעולה ראשונה של המעבד?

Answer 2

בדיקת סינטקס

Question 3

מה הם האוגרים של מעבד 8086?

Answer 3

Ax Bx Cx Dx
כול אחד בן 4 ספרות hex/ גודל 16 bit
מחולקים כול אחד ל 2 של 8 bit

Question 4

מה jnz עושה?

Answer 4

jnz - jump not zero

מעביר את המיקום לIP אם התוצאה מהפעולה הקודמת היא לא 0

Question 5

פעולה שניה של המעבד?

Answer 5

המרה לשפת מכונה

Question 6

what is the CS registert?

Answer 6

segment register number 1

Question 7

what is the DS register?

Answer 7

segment register number 2

Question 8

what is the SS register?

Answer 8

segment register number 3

Question 9

what is the ES register?

Answer 9

segment register number 4

Question 10

what is the SP register?

Answer 10

index register number 1

Question 11

what is the BP register?

Answer 11

index register number 2

Question 12

what is the SI register?

Answer 12

index register number 3

Question 13

what is the DI register?

Answer 13

index register number 4

Question 14

what is the IP register?

Answer 14

index register number 5

Question 15

what registers can be access with the h/l endings?

Answer 15

A B C D can be accessed by

Question 16

how do you check for number of possible combinations

Answer 16

the number of possible values to the power of number of places for thous values

Question 17

how many flags are there for the 8086?

Answer 17

9

Question 18

when does the over flow flag light up? (it has nothing to do with overflowing anything)

Answer 18

when an operation dosnt make sense (if considered as a sign operation) for example 
(+) + (+) =    (-)
(-)  + (-)  =   (+)
(-)  -  (+) =   (+)
(+)  - (-)  =   (-)

Question 19

when does the sign flag light up?

Answer 19

when the MSB is light up.

Question 20

when does the zero flag light up

Answer 20

if the result is 0

Question 21

when does the Aux flag light up?

Answer 21

when you have as a result in the right digit a number with 2 digits(moving one to the left)
or
when we borrow from the left in subtraction (the 10-1=9 deal)

Question 22

when does the parity flag light up?

Answer 22

even number of 1’s.

Question 23

when does the carry flag light up?

Answer 23

in ADD - out of dedicated memory bounds result

In SUB - “borrowing” from a out of dedicated memory bounds