© Thomas Kunz 2000
SCE 574
70
Anatomy of an Assembler Language (cont.)
äI) Assembler directives
äSpecial instructions to assembler
äEx:
äHow  to create and structure a program (type of processor, for ex: 80186, 80286,.....)
äConditional assembly
äIFDEF Test
ä; process these assembly language statements
äELSE
ä; process these assembly language statements
äENDIF
äHow to structure the resulting support files (listings, cross reference files, etc...
äSometimes directives exist for high level statements
äWhile while_expression
ämacro_body
äENDM