B.5.10 RSTNDX

RDDISK (6.16), SEARCH (6.17), WRTDSK (6.22)

 An INDEX COMM0N area is restored from MEMORY, by name, by

calling subroutine RSTNDX. This routine uses SEARCH to locate the

directory entry for the data item. If the data item is stored on

mass memory it is read into MEMORY by RDDISK (possibly preceded by a

call to WRTDSK to prevent data in MEMORY from being destroyed). Once

the address of the data in MEMORY is known, the data are transferred

back to the INDEX C0MMON area.

B.5.11 RSTSIM

RDDISK (6.16), SEARCH (6.17), WRTDSK (6.22)

 To restore an SIM from MEMORY to the SIM COMMON area the sub-

routine RSTSIM is called. The function SEARCH determines the directory

entry for the SIM. If it is not in MEMORY, it must be read from mass

memory to MEMORY using RDDISK. First, however, it may be necessary to

store the data in MEMORY onto mass memory using WRTDSK to prevent their

destruction. Once the address of the SIM in MEMORY is known the SIM

is moved back to the SIM COMMON area.

B.6.12 SUBSIM

ISPACE (6.10)

 The subroutine SUBSIM eliminates rows and columns, whose status

flags are less than zero, from the SIM COMMON area. The SIM is copied

into the work space in the SPACE COMMON area. First the work space is

initialized by calling ISPACE. The retained part of the SIM is then

copied back into the SIM COQIlU'1i area.