For this lab you will implement a basic LC$3$ assembly program which calculates the sum of

$102$s complement numbers

Program Details

Your program will start at x$3000$ in memory and sum the numbers stored at memory

locations x$3100$ to x$3109.$ Please note that while the autograder will populate these memory

address with data values, when testing your program, you will need to place these values into

memory manually. I recommend doing so by modifying the memory values via the simulator

rather than using assembly code. The final sum will be stored at memory location x$310$A$.$

Once stored, your program will halt the machine using the HALT command.

You must place any $.$FILL pseudo$-$ops after your HALT command. Placing $.$FILL pseudo$-$

ops before the HALT will cause the data stored at those locations to be executed as

instructions. This can cause your code to produce unexpected results and prevent

Gradescope from executing correctly.

My code so far:

$.$ORIG x$3000$

AND R$0,$ R$0,$ #$0$

LD R$1,$ START$\_$ADDR

AND R$3,$ R$3,$ #$0$

ADD R$3,$ R$3,$ #$10$

LOOP

LDR R$2,$ R$1,$ #$0$

ADD R$0,$ R$0,$ R$2$

ADD R$1,$ R$1,$ #$1$

ADD R$3,$ R$3,$ #$-1$

BRp LOOP

ST R$0,$ RESULT

HALT

START$\_$ADDR $.$FILL x$3100$

RESULT $.$FILL x$310$A

$.$END

Errors$/$Failed Tests:

one$2$TenTest Test $(0/10)$

When summing the values $1-10$ we expected $55$ but was $0$

ten$2$OneNegativeTest $(0/10)$

When summing the values $-10--1$ we expected $65481$ but was $0$

somePositiveSetTest $(0/10)$

When summing the values $12,61,8,23,82,81,16,8,36,101$ we expected $428$ but was $0$

someNegativeSetTest $(0/10)$

When summing the values $-83,-3,-71,-8,-28,-46,-26,-523,-868,-2$ we expected $63878$ but was $0$

someMixedSetTest $(0/10)$

When summing the values $62,-73,57,-97,29,-36,8,-276,539,-84$ we expected $129$ but was $0$