Motorola HC12 Manuale Utente

User’s Manual

MCUez HC12 Assembler

172

Assembler Directives

MOTOROLA

Syntax:

[<label>:]

DCB

 [<size>] <count>, <value>

where

<size> = B (default), W, or L

Description:

The

DCB

 directive causes the assembler to allocate a memory

block initialized with the specified <value>. The length of the
block is <size> * <count>.

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

The value of each storage unit allocated is the sign-extended
expression <value>, which may contain forward references.
The <count> cannot be relocatable. This directive does not
perform alignment.

These rules apply to size specifications for

DCB

 directives:

•

DCB.B

 — One byte is allocated for numeric expressions.

•

DCB.W

 — Two bytes are allocated for numeric

expressions.

•

DCB.L

 — Four bytes are allocated for numeric

expressions.

Example:

000000 FFFF FF     Label: DCB.B 3, $FF

000003 FFFE FFFE          DCB.W 3, $FFFE

000007 FFFE

000009 0000 FFFE          DCB.L 3, $FFFE

00000D 0000 FFFE

000011 0000 FFFE