Does anyone know if there is a document that contains the definition and operation of these DB, FCB, DW, or FDB pseudo-ops??
Are you referring to Codewarrior?
If so, then FCB and FDB are listed as synonyms for Codewarriors native DC.B and DC.W in the Assemble_HC08 document in the help directory.
There appears to be more of these synonyms than are actually list in the manual.
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