John has recently retired from an administrative, yet technical job which he held for 40 years. He decided to pursue a life-long dream – leather works. John’s life-long dream quickly became a booming business and orders for purses, shoes, bags, and belts were streaming in. You, being a nifty IT student, you quickly saw how you could develop a system that would help John manage his business. Q.1.1 Identify three benefits that John will reap from the implementation of a computerised system for his business. (3)

Write a new lc-3 trap subroutine (i. e. a subroutine that will be invoked via the trap instruction) that will receive a numeric digit entered at the keyboard (i. e. an ascii character), echo it to the screen, and return in r0 the corresponding numeric value: so if the user types the digit '7', the character '7' will appear on the screen, but the value returned in r0 will be b0000 0000 0000 0111 (#7) you may not use any trap calls in your code - you must implement the "polling" code that interrogates the keyboard status and data registers. ; getnum_tsr ; a subroutine for obtaining a numeric value ; given ascii numeric digit input to keyboard. ; the numeric digit is echoed to the console (e. g. '7' = b0000 0000 0011 0111), ; but the value returned in r0 is the actual numeric value ; corresponding to the digit (e. g. b0000 0000 0000 0111 =