The second part of the laboratory task $($Section $3$c$)$ requires you to add the values extracted

from the table together using $8-$bit arithmetic. If we assume a student number digit of $1,$ then

the algorithm becomes:

The first part of the algorithm requires you to multiply the value of $$k$$ by $2.$ Whilst the AVR

does have a multiply Assembler instruction $($MUL$)$ what other operation can be performed to

multiply an $8-$bit unsigned integer by two?

The next part of the algorithm then requires the two values extracted from the lookup table

$$keyTable$$ to be added together. Reviewing the values of $$keyTable$$ shows that keyTable$[2]$

$=0$x$98(152$ decimal$)$ and keyTable$[5]=0$x$09(9$ decimal$).$ Adding these two hexadecimal

digits together results in $0$xA$1(161$ decimal$)$ being assigned to $$keySum$.$ Note that in

Assembler $/$ C$,$ array $($table$)$ indices start at $0.$

For an $8-$bit computation, the maximum result that can be stored is $0$xFF $(255).$ Beyond that,

we require the use of a carry$-$bit. Based on the Assembler instructions, for a $16-$bit

computation $($Section $3$g$)$ you will need to use an $$Add instruction$,$ followed by an $$Add with

Carry$.$

As you develop your solution it is high recommended to write small pieces of test code that

assist in understanding how the instructions operate. Assembler can become complicated

quickly if you try to do everything at once. Remember that you can comment out sections of

code using a semicolon $$;$.$

$3)$ Another important component of the l