System information

An unparenthesized expression is well-formed only if the expression that results from inserting
the assumed parentheses is well-formed.
3.4 Assembler Directives
Assembler directives are used to set labels to specific values during the assembly, perform
conditional assembly, define storage areas, and specify starting addresses in the program. Each
assembler directive is denoted by a pseudo operation that appears in the operation field of the
line. The acceptable pseudo operations are shown in Table 3-3.
Table 3-3. Assembler Directives
Directive Meaning
ORG set the program or data origin
END end program, optional start address
EQU numeric equate
SET numeric set
IF begin conditional assembly
ENDIF end of conditional assembly
DB define data bytes
DW define data words
DS define data storage area
3.3 Forming the Operand CP/M Operating System Manual
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