CSC103 Homework 3 2017

--D. Thiebaut (talk) 11:28, 26 September 2017 (EDT)

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This assignment is due on 10/8/2017, at 11:55 p.m. Submit your answer on Moodle. You may work in pairs on this assignment, but make sure you

Assembly Language Programming

Write a an assembly language program using the SCS simulator we used in class, to compute the quantity

y = 2 * ( x - 1 )

where and x and y are two variables stored in memory.

When your program starts, x will contain an integer number of your choice, say 5, and y will contain 0. When your program stops, the memory location corresponding to y will contain 8, which is equal to 2 * (5 - 1). If x had contained 10 when the program started, then y would have contained 18 when your program had stopped.

Use comments (after the semicolon) to document what each instruction does. Below is an example of how I would comment a simple program that adds one to Variable x stored in Memory Location 7:

; D. Thiebaut
; This program adds 1 to variable x
; stored at Memory Location 7
0000:    LOAD [7]        ; AC <-- x
0002:    SUB 1          ; AC <-- x - 1
0004:    STORE [7]        ;x <-- x - 1
0006:    HALT            ;
0007:    10            ; x.  Initial value of 10

When you are satisfied that your program runs well and computes the correct value for y, submit it (copy/paste it) on Moodle, in the Homework 3 section.









Submit your program