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Assembler Directives
8.8 DCB — Define Constant Block
Syntax:
[<label>:] DCB [<size>] <count>, <value>
where
<size> = B (default), W, or L
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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
000003
000007
000009
00000D
000011
FFFF
FFFE
FFFE
0000
0000
0000
FF
FFFE
Label: DCB.B 3, $FF
DCB.W 3, $FFFE
FFFE
FFFE
FFFE
DCB.L 3, $FFFE
User’s Manual
172
MCUez HC12 Assembler
Assembler Directives
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