Instructions

$$ Start your programs at x$3000.$

$$ Make sure to comment each line of code in the case of machine code and have

adequate comments in case of assembly code. Use the four$-$column model for assembly code

$1.$ Write a machine code program for the LC$3.$ It should print out the letters: AZBYCXDWEVFUGTHSIRJQKPLOMN That is$,$ print all $26$ letters of the English alphabet alternating letters in ascending order, starting at $$A$,$ with letters in descending order, starting with $$Z$.$ Your program must use loop$($s$).$

$2.$ Write an assembly language program to simulate a simple guessing game. The program has stored the value $$n$($n is a number between $0$ and $9,$ inclusive$).$ The program will continually ask the user to guess a number between $0$ and $9($see sample

program input$/$output below$).$ If your program encounters any non$-$digit character, the

program should output $$Invalid input$.$ Invalid input should still count as a guess. You can use $$

$$ in your strings $(.$STRINGZ$)$ to make the prompt start on a newline. Assume that the user guesses correctly within $9$ guesses.

Your program is required to include a line of code like the following:

Number $.$FILL #$7$ ; The number to guess

The line of code above should allow the user to succeed when they enter $\text{'}7\text{'}.$If I edit your program during grading and change $\text{'}$n$\text{'}$ to another value in the range $0$ to $9,$then your program should behave appropriately with the new value.

Sample Output

Guess a number from $0$ to $9$: $3$

Your guess was too low.

Guess again: $9$

Your guess was too high.

Guess again: a

Invalid input.

Guess again: $7$

Correct! You took $4$ guesses.