IBM Professional Series User Manual page 288

SET
Use the SET command to establish, turn off, or reset a
particular function in your CMS virtual machine. Only one
function may be specified per SET command. The format of
the SET command is:
SET function
functions:
[LDRTBLS nn]rRELPAGE ON ]
LRELPAGE OFF
[
ABBREV ON
J
[I MPEX ON
J
ABBREV OFF IMPEX OFF
[
I MPCP ON ] rCMSTYPE ~ HT
tJ
IMPCP OFF L
1
RT
5
Where functions:
LDRTBLS nn
[
OSSIM ON
J
OSSIM OFF
[INPUT
[x~ ~~JJ
[OUTPUT
[xx a]]
defines the number (nn) of pages of storage to be used
for loader tables. By default, a virtual machine having up
to 384K of addressable real storage has two pages of
loader tables; a larger virtual machine has three pages.
Each loader table page has a capacity of 204 external
names. During LOAD and INCLUDE command
processing, each unique external name encountered in a
TEXT deck is entered in the loader table. The LOAD
command clears the table before reading TEXT files;
INCLUDE does not. This number can be changed with
the SET LDRTBLS nn command provided that: (1) nn is
a decimal number between 1 and 127, inclusive, and (2)
the virtual machine has enough storage available to allow
nn pages to be used for loader tables. If these two
conditions are met, nn pages are set aside for loader
tables.
If
you plan to change the number of pages
allocated for loader tables, you should deallocate storage
at the high end of storage so that the storage for the
loader tables may be obtained from that area. Usually,
you can deallocate storage by releasing one or more of
the disks that were accessed.
Chapter 7. VMjPC Commands 7 -115