Note: Output is worth 40 points. Each of these is worth 8 points of output. sample1.txt Tests the indexed load instructions. Prints two tables, one of A-Z, the other of 1-10. sample2.txt Tests the call/ret instructions. Prints a face where the lines are printed using subroutine calls. sample3.txt Tests the int/iret instructions. The main loop is printing the letter A followed by a number that is being periodically incremented by the timer. The number will increment faster if the timer period is shorter. sample4.txt Tests the proper operation of the user stack and system stack, and also tests that accessing system memory in user mode gives an error and exits. sample5.txt Calculates sum from i=1 to i=n of n, where n is the value stored at address 500.