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A.3.2 Defining variable with initial values

To allocate a variable area with a default value, use the .db directives/.db2/.dhw directives/.db4/.dw directives in the section with the default value.

 

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1-byte values

[label:]        .db value

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2-byte values

[label:]        .db2 value

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4-byte values

[label:]        .db4 value

 

In order that it may be referenced from other files as well, it is necessary to define the label with the .public directive.

.public label_name

 

Example

Defining variable with initial values

        .dseg   sdata
        .public _val0        ;Sets _val0 as able to be referenced from other files
        .public _val1        ;Sets _val1 as able to be referenced from other files
        .public _val2        ;Sets _val2 as able to be referenced from other files
        .align  4            ;Aligns _val0 to 4 bytes
_val0:
        .db4    100          ;Allocates a 4-byte area for _val0, and stores 100 in it
_val1:
        .db2    10           ;Allocates a 2-byte area for _val0, and stores 10 in it
_val2:
        .db     1            ;Allocates a 1-byte area for _val0, and stores 1 in it