Character(s)
blank
(
...
)
CR
HT
&
<
...
>
%
Label/Name Field
Meaning
one
or more
blan
ks
comma
pair
of
single
quote
characters
pair
of
paren-
theses
carriage return
horizontal tab
semicolon
colon
ampers(lrid
pair
of
angle
brackets
per-cent ',ign
excldmation
point
double semi-
colon
Chapter
2.
Assembly
Language
Concepts
Use
field separator or symbol terminator
separate operands
in
the operands field,
including macro pardmeters
delimit a character string
delimit
an
expression
statement
terminator
field separator or symbol terminator
comment
field delimiter
delimiter for
,ymbols
used
dS
labels
delimit
macro
prototype
text or formdl
pardmeters for concdtenation
delimit macro pJrdmeter text which
contains
commdS or embedded blank,;
also
used to delimit a pJrameter list
delimit
a macro pdrameter thdt
is
to be
evaludted prior to sub,ti.tution
an
escape character used to pass the
following chdrdcter
dS
pdrt
of
d mdcro
parameter when the character might
otherwise
be
interpreted as d delimiter
delimiter for comments
in
macro definitions
when the
comment
is
to
be suppressed when
the macro
is
expanded
Labels arc alwdys optional. An instruction label
is
d symbol name whose value
is
the locdtion where the imtruc-
tion
is
assembled. A label may contain from one to six alphdnumeric chdracters, but the first chJrdcter
mu,t
be
alphabetic
or
the specidl characters
'7'
or
'@'.
The label name must
be
terminated with a colon. A symbol used
as
a label can
be
defined only once
in
your program. (See 'Symbols and Symbol Tables' later
in
this chapter.)
2-3
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