String Primitives and Macros

Portfolio assignment for CS 271: Computer Architecture & Assembly Language course at Oregon State University

Program Description

Write and test a MASM program to perform the following tasks:

• Implement and test two macros for string processing

  • mGetString: Display a prompt (input parameter, by reference), then get the user’s keyboard input into a memory location (output parameter, by reference)
  • mDisplayString: Print the string which is stored in a specified memory location (input parameter, by reference)

• Implement and test two procedures for signed integers which use string primitive instructions

  • ReadVal:
    • Invoke the mGetString macro to get user input in the form of a string of digits
    • Convert (using string primitives) the string of ascii digits to its numeric value representation (SDWORD), validating the user’s input is a valid number (no letters, symbols, etc.)
    • Store this one value in a memory variable (output parameter, by reference)
  • WriteVal:
    • Convert a numeric SDWORD value (input parameter, by value) to a string of ASCII digits
    • Invoke the mDisplayString macro to print the ASCII representation of the SDWORD value to the output

• Write a test program (in main) which uses the ReadVal and WriteVal procedures above to:

  • Get 10 valid integers from the user
  • Stores these numeric values in an array
  • Displays the integers, their sum, and their truncated average