Assembly Language Question As we discussed in class to read

Assembly Language Question:

As we discussed in class, to read an integer input from keyboard, we use system call number 5. After a user entered a number, which register will contain the number user entered? $s0 $to $a0 $v0

Solution

[A] $s0 : saved by procedures. When you are writing a procedure, you must save and restore previous values.

[B] $t0 : used for temporary use. Use freely but if youcall a procedure that procedure may change it.

[C] $a0 : used for arguments to a function .

[D] $v0 : used for values returned by a function.

Answer [B]