Memory calculations 151
Note 17: New
Fletible
Code Restriction (NFCR) requires the following
memory requirements:
1) A 129 word block that contains:
(a) A 128 word table that contains the pointers to the.FRL block for
each route.
(b) A pointer to the tree root address table.
2) A table that contains the pointers to the NFCR trees. Its length is defined
by the maximum number of trees (defined in the customer data block).
3)
Four words are required for each route that has defined FRL codes.
4) Storage for customer defined trees. Amount of memory used depends
on the size of the code restriction trees the customer has defined.
It is possible to calculate an upper bound for the amount of memory that a
tree is using by applying the following formula:
. .
1) The INIT condition occupies 12 words, or 14 words in R12-14.
2) For each digit sequence after the INIT condition:
(a) If the digit sequence is greater than 1 digit, memory required = (3 x
number of digits)
-
4.
(b) If the digit sequence has a count field, memory required for digit
sequence increases by 1.
(c) If the digit sequence is from a BYFS, memory required for digit
sequence increases by 1.
I
,...
,..
,
.
,
1
.:
Memory calculations 553-2201-l 51 Appendix 1