Accessing a field address

To access a structured-type field address (Listing: Example of accessing a field address), the Assembler uses the colon character ':'.

  var:field

  

where

• var is the name of a variable, which was associated with a structured type.
• field is the name of a field in the structured type associated with the variable.
  Listing: Example of accessing a field address

  
  myType:  STRUCT
  field1:    DS.W  1
  
  field2:    DS.W  1
  
  field3:    DS.B  1
  
  field4:    DS.B  3
  
  field5:    DS.W  1
  
           ENDSTRUCT
  
           XREF  myData:myType
  
           XDEF  entry
  
  CodeSec: SECTION
  
  entry:
  
           LDA   myData:field3  ; Loads register A with the content of
  
                                ; field field3 from variable myData.
  

  Note: The period cannot be used as separator because in assembly language it is a valid character inside of a symbol name.