© Thomas Kunz 2000
SCE 574
91
Moves contents of
cell DS:X into AX
then adds contents
of DS:Y to AX
Moves 0 into My_Array[0]
Moves 0 into My_Array[1]
Moves 0 into My_Array[2]
Moves 0 into My_Array[3]
Assembler Example
.DATA
X DW 1
Y DW -1
My_Array DW 4 DUP(10)
.CODE
START MOV AX,@DATA
MOV DS,AX
MOV AX,X
ADD AX,Y
......
MOV BX,OFFSET
My_Array
MOV [BX], AX
MOV [BX+2],AX
MOV
[My_Array+4],AX
MOV SI,6
MOV [BX +SI],AX
.END START
Immediate mode
Optional keyword
Offset, loads the
offset of My_Array
from the beginning
of the Data seg.
Need to
initialize the
Data segment
What would
happen with
MOV BX,[My_Array]?
When the
assembler
sees an
arithmetic
operation
it looks up
16 bit address
of variable
name
