CIS $350-$ INFRASTRUCTURE TECHNOLOGIES

GROUP HOMEWORK #$7-30$ POTNTS $($MAKE$-$UP$)$

Topic: Address translation under segmentation, paging, and segmentation and

Paging $($Translation of virtual addresses to physical addresses$)$

Logistics

Get in touch with your group. $($See Groups folder on Blackboard.$)$

Discuss and complete the assignment together via E$-$mail, Discussion

Forum, Blackboard Collaborate Ultra, and$/$or MS Teams.

Choose a recorder to prepare the final copy $($one per group$)$ and

submit it via the Blackboard Assignments$/$Small Group Activities

folder to the instructor.

Be sure all group members' names are on final copy. Do not add names

of your group classmates who did not participate in the assignment.

I. Assignment

Work $3$ problems on address translation under $(1)$ segmentation, $(2)$ paging, and

$(3)$ segmentation and paging.

In particular, your job has the following sections:

A$.$ Allocate space for the program when it is loaded

Find the memory space to use

Create the appropriate segment or page tables

B$.$ Perform address translation during I$-$time $($Instruction time$)$

Calculate the physical address from the virtual address under

Segmentation, paging, and segmentation and paging

Note: Clarification on I$-$time. In the computer, instructions are

executed in machine cycles. The machine cycle consists of I$-$time

$($Instruction time $-$ Fetch Phase$)$ and E$-$time $($Execution time $-$ Execution

Phase$).$ During I$-$time the instruction is fetched from memory to the

instruction register $($Fetch Phase$).$ During E$-$time the instruction is

executed $($Execution Phase$).$ Address translation is performed during I$-$time

before the instruction is executed. I$-$time works with virtual addresses,

whereas E$-$time operates on physical addresses.

MEMORY MAP FOR SEGMENTATION

PROBLEM $1$

Load Program $A-4$ segments: seg$0=$size$7K,1=15K,2=9K,3=10K$

Create Segment Table

Find the physical address of virtual address

seg# disp.