## ALP Programming Guide and Reference

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### Address Size

If an expression refers to an effective address, then it also has an associated address size. The following ExpressionType s normally reference an effective address, and thus have an associated address size:

Immediate-ExpressionType
Direct-ExpressionType
Indirect-ExpressionType
Indexed-ExpressionType

The address size can be either 2 (USE16) or 4 (USE32). For an expression that references a label, the address size of the segment where the label is defined determines the address size of the expression.