HP 3000 Manuals

Controlling System Activity

Extra Data Segments (DS) 

This capability lets users and programs create and manage extra data
segments.  Normally, a program uses these data segments for temporarily
storing large amounts of data.  Thus, the program's global data area
stays relatively small.  The extra data segment is purged at the end of
the program.  Programmers manage extra data segments through the GETDSEG,
FREEDSEG, DMOVIN, DMOVOUT, and ALTDSEG intrinsics.  For further
information, refer to the MPE XL Intrinsics Reference Manual 
(32650-90028).

MPE/iX 5.0 Documentation