Zilog ZUSBOPTS Manual de usuario descargar pdf (Pagina 259)

100

101

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>

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