CS 3Bpi Arithmetic Input strings

CS 3Bpi Arithmetic Input strings Inputting Numerical Values and Performing Arithmetic
Write a program named  rasm2.s  which will input numeric information from the keyboard, add, subtract, multiply, and divide, as well as check for overflow and/or invalid numeric information. You may only use methods from external files that I approve.
New Commands
For this assignment you may need the following NEW external macro:  IDIV,along with several of the mnemonic ‘B’ jumps: 
 

 
Documentation standards for Assembly – please remember to adhere to the below standards
In addition to a comment block at the top of your code (as per examples in class), you must follow one of the below coding requirements:

@*****************************************************************************
@Name:    Your Name
@Program:    RASM2.s
@Class:    CS 3B
@Lab:        RASM2
@Date:    October 4, 2018 at 8:00 AM
@Purpose:
@    Input numeric information from the keyboard, perform addition, subtraction, 
@     multiplication, and division. Check for overflow upon all operations. @*****************************************************************************
1)  a)  All of the “dot” directives (.data, .text, etc) MUST be indented at least one TAB
     b)  ALL labels (including data identifiers and labels on assembly instructions) MUST begin in column 1
     c)  ALL code instructions MUST begin at least one TAB over


.data
iNum    .word    0

    .text


2) All string identifiers for input/output MUST begin with str 
3) All words must begin with the letter ‘i’ to indicate that is the size of an int
4) All byte identifiers must begin with the letter ‘b’  to indicate a byte OR the letter ‘c’  to indicate a char
5) Every identifier (except string constants) MUST have a comment explaining its use in the program
6) a)  Identifiers and labels MUST be camel-cased and begin with a lower-case letter
    b)  label identifiers MUST be on a line by itself. Do not write any code on a line that contains a label identifier
7) The only label in your “driver” program that begins with an underscore ‘_’ is the  _start. This convention is typically used in other methods for any identifiers that might be used (labels and/or data identifiers – in our class you will never define data storage within any method except your “driver” (unless otherwise instructed)
8) Line comments MUST be used on EVERY line of code in your assembly program. Only on rare occasions will you not put a comment. 
9) Comments MUST line up within the data segment and within the code segment where at all possible. There will be instances when a few instructions are so long that it would confuse things.
10) No line-wrapping permitted! Set the edge to 91 with Notepad++.
11) The directives (byte, hword, word, ascii, etc.) MUST line up within the data segment, as closely as possible

Program Requirements
Write your program to continue asking for values until the user hits just the ENTER key (in which case the very first character in the numeric string is the NULL character). If the user hits just the ENTER key for any requested input the program terminates.
Below, I have listed “sample runs” to show you what should appear on the screen. Underlined values indicate what the user entered and how you are to respond.
Name:        Your name
Program:    rasm2.asm
Class:    CS 3B
Date:        October 4, 2018

Enter your first number:  100
Enter your second number: 200
The sum is 300
The difference is -100   (the result of the first number – the second number)
The product is 20000
The quotient is  0   (the resulting quotient of dividing the first number by the second)
The remainder is 100  (the resulting remainder upon division of the first number by the second)
Enter your first number:  -152
Enter your second number: 6
The sum is -146
The difference is -158   
The product is -912
The quotient is  -25   
The remainder is -2  
Enter your first number:  146
Enter your second number: 0
The sum is 146
The difference is 146   
The product is 0
You cannot divide by 0. Thus, there is NO quotient or remainder 
Enter your first number:  1B0
INVALID NUMERIC STRING. RE-ENTER VALUE
Enter your first number:  1400
Enter your second number: 4000000000
OVERFLOW OCCURRED. RE-ENTER VALUE
Enter your Second number: 400
The sum is 1800
The difference is 1000  
The product is 560000
The quotient is  3   
The remainder is 200  
Enter your first number:  100
Enter your second number: 1B0
INVALID NUMERIC STRING. RE-ENTER VALUE
Enter your second number: 1400
The sum is 1500
The difference is -1300   (the result of the first number – the second number)
The product is 140000
The quotient is  0   
The remainder is 100  
Enter your first number: 2147483647
Enter your Second number: 10
OVERFLOW OCCURRED WHEN ADDING
The difference is 2147483637   
OVERFLOW OCCURRED WHEN MULTIPLYING
The quotient is  214748364  
The remainder is 7  
If you are ever prompted for a number and you just hit the ENTER key, terminate your program. For example,
Enter your first number:  1400
Enter your second number: 1B0
INVALID NUMERIC STRING. RE-ENTER VALUE
Enter your second number:      (here user just hits the ENTER key)
Thanks for using my program!! Good Day!
(leave a blank line after your program ends to make it easier to read)
C:\Temp _

Deliverables- DO NOT SUBMIT A ZIPPED FILE
Upload rasm2.s to canvas. Make sure that you have full documentation at the beginning of your program, that your purpose is descriptive and specific, that you display the header information when the program is run. Make sure that every line is commented with a brief, but descriptive, comment. DO NOT OVER COMMENT. Where possible line up your comments to make them more readable. You must comment every identifier that is not a literal constant.
strOverflowAdd    .byte 10,13,”OVERFLOW occurred when ADDING”,0
strOverflowSub    .byte 10,13,”OVERFLOW occurred when SUBTRACTING”,0
strOverflowMul    .byte 10,13,”OVERFLOW occurred when MULTIPLYING”,0
strOverflowConv    .byte 10,13,”OVERFLOW occurred when CONVERTING”,0
strInvalidString .byte 10,13,”INVALID character in numeric string”,0

Hint:  If the user is prompted to enter something and the user only hits the ENTER key without typing anything, a NULL string is created, which means the very 1st character in that string is  0  (the null character). So, to see if the user is ending the program, just compare the 1st character in the input string to 0. If it is equal to 0, then jump to displaying the final output line(s).
Restrictions
ALL user input must go into a keyboard buffer that can hold up to 512 bytes. Reuse it for all of your inputs. If you need to save the input into another string, then write a loop that will copy from the keyboard buffer into your string variable. If you want to store in your program declare the below 2 identifiers. When requesting a numeric value, use iLimitNum to restrict the number of characters the user can enter. 
iLimitNum    .word    12;   the limit for entering numeric strings
Handle the case if the user types more than iLimitNum allows (i.e. type 12345678901234567890). Your program should not break. When you are requesting input you do not need to worry about it being a valid numeric string as the ascint32  method will test it for you.