146


vector moved to MEMORY is that part which contains data.

B.3.2 STOSIM

MEMSTR (4.4), CLRMEM (6.3)

 The subroutine STOSIM stores the SIM COMMON area, containing the

complete specifications for an SIM, into the MEMORY COMMON area. The

beginning address in MEMORY, into which the data are to be moved, is

determined by the function MEMSTR. Should MEMSTR indicate that there

is insufficient space in MEMORY, a call is made to CLRMEM to try to

create more space. Only those parts of each SIM vector containing data

are stored into MEMORY.


B.4 Level 4 Subprograms

B.4.1 JiADJT

J1CTWE (5.2)

 If several two-way edges are reduced by the subroutine JITWER it

 is possible that the tear choices are not the optimum ones. This is

 because some variables may appear in more than one two-way edge. They

 may not be torn as part of one but later torn as part of another. This

 would reduce the tear weight for the variable set not torn, in the case

 of the first two-way edge. J1ADJT examines all two-way edges to assure

 that the choice made remains the optimum. If it does not the tears are

 reversed. The function J1CTWE is used to trace the two-way edges.

 B.4.2 J1BTA

 J1CTIWE (5.2), INSERT (6.9)

 The subroutine J1BTA performs the Basic Tearing Algorithm for

 ALWET. The second word of the R- and C-cells is used as a status flag

 with the following possible meanings: -2=torn, -1=deleted, 0=normal