XSEG Assembler Statement

XSEG 〚AT address〛

The XSEG statement selects an absolute segment within XDATA space.

If the optional address is included, the assembler starts the absolute segment from that address. The valid address range is 0000h-0FFFFh.

If the optional address is omitted, the assembler starts the absolute segment from address 0 (if no prior absolute XDATA segment was defined). If an absolute XDATA segment was previously defined, the assembler continues from the end of that segment.

Note

• The start address must be an absolute expression.
• The AX51 Assembler converts XSEG statements into the following:

  ?XD?modulename?n SEGMENT OFFS address
  

  Where

  modulename	is the name of the source file.
  n	is a sequential number.
  address	is the address specified in the XSEG statement.

BSEG, CSEG, DSEG, ISEG, XDATA

           XSEG  AT 1000H     ; absolute XDATA segment
                              ; at 0x1000

OEM_NAME:  DS    25           ; 25 bytes space
                              ; for variable OEM_NAME

PRD_NAME:  DS    25           ; 25 bytes space
                              ; for variable PRD_NAME

VERSION:   DS    25           ; 25 bytes space
                              ; for variable VERSION