Panasonic MN1030 12 dw, Section DATA, Public, 3930 Dw0 dw 12345, 34127856 Dw1 dw 0x1234

Chapter 9 Writing Machine Language Instructions and Directive Statements

9.4.12 dw

Syntax

label	operation	operand
[name]	dw	expression (, expression )...

Functional description

This directive is used to define 16-bit constants in a memory area. The 16-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 operands are delimited with commas (,). Any number of operands can be coded.

If data that exceeds 16 bits is specified, the lower 16 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 16 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 dw directive.

			dw.lst	Page 1
	*** PanaX Series MN1030 Cross Assembler ***
Loc	Object	Line	Source
		1	_DATA	section DATA, PUBLIC, 4
00000000	3930	2	dw0 dw	12345
00000002	34127856	3	dw1 dw	0x1234, 0x5678
00000006	0000	4	dw2 dw	0

Writing Directive Statements 169