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assembly prob

I am a college student working on a homework problem. I have to write an assembly language prog that will add together the two signed 8-bit numbers stored in locations referred to by first_no and second_no, and print out the answer in decimal including either a + or - sign. example it should print like this -123. i have this much code
DSEG SEGMENT
ARRAY DW 9D DUP(?)
MOV DL, 2
MOV CL, 9
MOV BX OFFSET ARRAY
MOV AL, 2
Again: MUL DL
SUB AX, 1
MOV BX, AX
INC BX
INC BX
DEC CL
JG AGAIN

and i'm stuck, can someone help me
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