Slide 5.7: Multiple initializers

Multiple Initializers

The variable name is only a place marker which marks the offset of the data from the beginning of its enclosing segment. Therefore, multiple initializers can be used in data definitions.

If multiple initializers are used in the same data definition, its label refers only to the offset of the first byte. For example,
```
   letters  BYTE  'a', 'b', 'c', 'd'
```
Assume that the letters is at offset 0. All offsets are shown in the table on the right.

Value	Offset
'a'	0000
'b'	0001
'c'	0002
'd'	0003

Not all data definitions require labels. For example,

    letters  BYTE  'a', 'b', 'c', 'd'
             BYTE  'e', 'f', 'g', 'h'

Within a single data definition, its initializers can use different data types. For example,

    mix1  BYTE  8, 16q, 32h        ; different radixes
    mix2  BYTE  00100010b, 'f'     ; character included

0 + [ `X` + 2 ]	0 + [ offset `X` + 2 ]	0 + [ offset `X` + 5 ]
.data X BYTE 1, 2, 3 .code mov ebx, X + 2 sub eax, eax add al, [ebx] call DumpRegs	.data X BYTE 1, 2, 3 .code mov ebx, OFFSET X + 2 sub eax, eax add al, [ebx] call DumpRegs	.data X BYTE 1, 2, 3 Y BYTE 4, 5, 6 .code mov ebx, OFFSET X + 5 sub eax, eax add al, [ebx] call DumpRegs
Output	Output	Output
EAX =	EAX =	EAX =