E$3\mathrm{.}1$ Write assembler directives to define the ASCII codes of letters a to z in

program memory.

E$3\mathrm{.}3$ Invoke the SetPointer macro defined as following to load the address $0$x$3000$

into Y register.

macro setPointer

ldi @$0,$ low$($@$2)$

ldi @$1,$ high$($@$2)$

endmacro

E$3\mathrm{.}5$ Write a program to add the $24-$bit numbers stored at data memory locations

$0$x$200-0$x$202$ and $0$x$203-0$x$205,$ respectively, and store the sum at $0$x$206-0$x$208.$

E$3\mathrm{.}9$ Write a program to subtract the $32$ bit number stored at $0$x$200-0$x$203$ from the

$32$ bit number stored at $0$x$204-0$x$207,$ and stored the difference at $0$x$208-0$x$20$B$.$

E$3\mathrm{.}11$ Write a program to swap the upper $4$ bis with the lower $4$ bits of every

element of an array of $8-$bit integers. The initial array is stored in the program

memory, and you must copy this array to the data memory for testing purpose.

E$3\mathrm{.}13$ Write a program to find the total number of elements in an array of $8-$bit

integers that are greater than $30$ and less than $100.$ Use for$-$loop looping construct.