Program in Machine language: ASCII conversion|computer science
Objectives:
This programming project will help you
· to apply concepts learned in programming the LC-3 machine;
· to write ML operate and data movement instructions ONLY;
· to use LC3Edit for program editing; and
· to use LC-3 Simulator to debug and execute a program.
Description:
For this programming project, you will write an LC-3 ML program that will convert ASCII decimal characters stored in memory, to their corresponding two’s complement representations. After conversion, the values will be added and the results stored in memory.
Specifics:
Your program should be written in LC-3 machine language. You may write the instructions either in binary or hexadecimal form.
Load your program in memory address x3000.
Assume that the ASCII representation of a two-digit decimal value is stored in a single memory location where bits [15:8] contain the tens digit value and bits [7:0] contain the ones digit value. For example, 0011 0011 0011 0100 represents the ASCII digits ‘3’ and ‘4’, which represents the decimal number 34.
Assume that two (2) two-digit ASCII values are stored in addresses x3101 and x3102. Convert each to its decimal values, add the values and store the sum in memory address x3100.
Overwrite the stored ASCII values with the converted decimal values in memory.
Example:
Address
Initial Contents
Results
x3100
undefined
62 = 0000 0000 0011 1110 (sum)
x3101
‘24’ = 0011 0010 0011 0100
24 = 0000 0000 0001 1000
x3102
‘38’ = 0011 0011 0011 1000
38 = 0000 0000 0010 0110
EC +5points: Use all three addressing modes at least once.
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