Panasonic MN1030 User Manual

Chapter 9 Writing Machine Language Instructions and Directive Statements

166 Writing Directive Statements

9.4.10 dc

Syntax

label

operation

operand

[name]

constant | expression (, constant | expression )...

Functional description

This directive is used to define constants in a memory area. The 8-bit constant specified by the

operand will be stored at the location of the statement specifying this directive.

When a name is coded for the label, the assembler will assign the current location counter value to that

name.

Operand coding rules

The expression coded in the operand must result in the attribute abs(absolute).

Refer to section 8.7.4 “Expression Attributes”, regafding attributes of expressions.

Specify one of the following constants or the operand.

•

character constant

•

string constant

The operands are delimited with commas (,). Any number of operands can be coded.

If data that exceeds 8 bits is specified, the lower 8 bits will be valid, and the upper bits will be lost. The

assembler will output a warning message in such cases.

When the specified data has fewer than 8 bits, those bits will fill the lower bits, and the upper bits will

be padded with zeroes.

Usage example

Below is an example use of the dc directive.

DC.LST

Page 1

*** PanaX Series MN1030 Cross Assembler ***

Loc

Object

Line

Source

_DATA

section

DATA,PUBLIC,4

00000000

cd0 dc

’A’

00000001

414243

cd1 dc

“ABC”

00000004

cd2 dc

255 >> 2

00000005

cd3 dc

(12+3)/2*2

00000006

cd4 dc

0b11111111

00000007

FFFE

cd5 dc

0377, 0376

00000009

cd6 dc

255