A.4.1 Defining Variables without Initial Values

Allocate a memory area in a DATA section.

To define a DATA section, use the .SECTION directive. To allocate a memory area, use the .BLKB directive for specification in 1-byte units, the .BLKW directive for 2-byte units, the .BLKL directive for 4-byte units, and the .BLKD directive for 8-byte units.

[Example]

        .SECTION area,DATA
work1:  .BLKB 1; Allocates a RAM area in 1-byte units
work2:  .BLKW 1; Allocates a RAM area in 2-byte units
work3:  .BLKL 1; Allocates a RAM area in 4-byte units
work4:  .BLKD 1; Allocates a RAM area in 8-byte units