Segmentation

We use simulator segmentation.py to study how virtual$-$to$-$physical

address translation works with segmentation. We ran a configuration

and got the following output with a slight modification.

ARG address space size $2$K

ARG phys mem size $1$M

Segment register information:

Segment $0$ base $($grows positive$)$ : $682573($decimal$)$

Segment $0$ limit : $1014($decimal$)$

Segment $1$ base $($grows negative$)$ : $10934($decimal$)$

Segment $1$ limit : $869($decimal$)$

For the following problem, you should assume a simple address

with two segments. Note that the base$/$limit pairs given to you

in different directions, depending on the segment, i$.$e$.,$ segme

grows in the positive direction, whereas segment $1$ in the nega

Given the above configuration, perform address translation for the

following three questions at the right side.

$1)$ For Virtual Address $1,980($decimal$),$ if it is an out$-$of$-$bounds address, fill in the blank with $-1,$ otherwise fill in the blank with the mapped physical address in decimal format.

$2)$ For Virtual Address $413($decimal$),$ if it is an out$-$of$-$bounds address, fill in the blank with $-1,$ otherwise fill in the blank with the mapped physical address in decimal format.

$3)$ For Virtual Address $1,136($decimal$),$ if it is an out$-$of$-$bounds address, fill in the blank with $-1,$ otherwise fill in the blank with the mapped physical address in decimal format.