Motorola HC12 User Manual

Assembler Directives

DS — Define Space

MCUez HC12 Assembler

User’s Manual

MOTOROLA

Assembler Directives

173

Syntax:

[<label>:]

DS

 [.<size>]  <count>

where

<size> = B (default), W, or L

Description:

The

DS

directive is used to reserve memory for variables. The

content of the reserved memory is not initialized. The length of
the block is <size> * <count>.

<count> may not contain undefined, forward, or external
references. It may range from 1 to 4096.

Example:

Counter: DS.B  2

; 2 contiguous bytes in memory

         DS.B  2

; 2 contiguous bytes in memory

; can only be accessed through the

; label Counter

         DS.L  5

; 5 contiguous longwords in memory

The label,

Counter,

 references the lowest address of the

defined storage area.