ISEG Assembler Statement

ISEG 〚AT address〛

The ISEG statement selects an absolute segment within IDATA space.

If the optional address is included, the assembler starts the absolute segment from that address. The valid address range is 00h-0FFh.

If the optional address is omitted, the assembler starts the absolute segment from address 0 (if no prior absolute IDATA segment was defined). If an absolute IDATA 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 ISEG statements into the following:

  ?ID?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 ISEG statement.

BSEG, CSEG, DSEG, IDATA, XSEG

           ISEG  AT 0xC0      ; absolute IDATA segment
                              ; at 0C0H

TMP_IA:    DS    2            ; absolute idata word variable
                              ; named TMP_IA

TEM_IB:    DS    4            ; absolute idata dword (32-bit)
                              ; variable named TMP_IB