Assume you are on the only person to write program on this system. Assume the system's OS uses the "priority-scheduling" scheduling algorithm. Assume that the OS has three different priorities (high, medium, low). Assume that you want to minimize context switches. Which strategy is the best? 1. Write all programs to have the same priority. 2. Write 1/3 of the programs to have high priority, 1/3 medium, and 1/3 low. 3. Either is acceptable4. Neither is acceptable

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 =