Zilog ZUSBOPTS - Manual (Page 259)

UM017105-0511 Directives
Zilog Developer Studio II – ZNEO™
User Manual
231
DEFINE
Defines a segment with its associated address space, alignment, and origin. You must
define a segment before you can use it, unless it is a predefined segment. If a clause is not
given, use the default for that definition. For more information about the
SEGMENT direc-
tive, see SEGMENT – see page 235. For a list of predefined segments, see Predefined
Segments – see page 213.
Synonym
.define
Syntax
<segment_definition> =>
DEFINE <ident>[<space_clause>][align_clause>][<org_clause>]
Examples
DEFINE near_code ; Uses the defaults of the current

; space, byte alignment and relocatable.

DEFINE irq_table,ORG=%FFF8 ; Uses current space, byte alignment,

; and absolute starting address at
; memory location %FFF8.
ALIGN Clause
Allows you to select the alignment boundary for a segment. The linker places modules in
this segment on the defined boundary. The multiple, given in bytes, must be a power of
two (1, 2, 4, 8, and so on).
Syntax
<align_clause> => , ALIGN = <int_const>
Example
DEFINE fdata,SPACE = ERAM,ALIGN = 2
; Aligns on 2-byte boundary, relocatable.
ORG Clause
Allows you to specify where the segment is to be located, making the segment an absolute
segment. The linker places the segment at the memory location specified by the
ORG. The
default is no ORG, and thus the segment is relocatable.
Syntax
<org_clause> => , ORG = <int_const>