Exercise $1$

Let's take another look at Exercise $3$ from last week.

At the time, we told you to hard code both remote addresses in the local data block $-$ but this is not really very efficient $($suppose you had a dozen data values up there $...)$

We know that the two remote data values are in contiguof $1$ s memory locations $(x4000$ and $x4001),$ so we ought to be able to just hard$-$code the first address and then use address arithmetic to get to the next.

So copy your Lab $2$ Exercise $3$ from last week into the lab$3\_$ex$1.$asm file in your current directory, but this time use just a single pointer in the local data block, and. FILL the address of the start of the remote

data block $($your remote $.$ORIG$).$ Call the local pointer DATA$\_$PTR$.$

You already know how to get the first data item from the remote location: how will you get the next? Hint: LDI won't work, because we don't have a pointer to it in the remote memory location. How about LDR$?$ But isn't the base register pointing to the first data value? How can you point to the next?

When you have figured this out, run the code $($read the two remote data values, modify them, & store the modified data back to the remote location$).$