User`s guide

SET
However, for those SET commands that do not permanently modify the device
handlers, the conditions return to the default setting after a reboot. To make these
settings appear permanent and to ensure you always have the settings you want
when you start your computer, include the appropriate SET commands in your
system’s STRTxx.COM file.
The SET command will modify only the device handler that corresponds to the
currently booted monitor. For example, if you issue the SET command while running
under a mapped monitor, any device handlers modified will be of the form %%X.SYS.
Remember: if a handler (except for TT or the handler specified in SET dd:
[NO]WRITE commands) is already loaded when you issue a SET command for it,
you must unload the handler and load a fresh copy from the system device for the
modification to have an effect on execution.
Summary of SET Command Options
Table 2 lists all the SET command options with their types and a brief explanation
of what each one is. The type is indicated by a T for TEMPORARY and a P for
PERMANENT. The temporary type lasts until you turn off your computer. The
permanent type remains when you reboot your computer.
The SET command descriptions following the table define each command
separately.
Table 2: SET Options
Option Type Parameter the Option Sets
CLI T Command-Line Interpreter (DCL, CCL, UCL, UCF)
CLOCK T Frequency of system clock
DL: P DL disk handler (RL01/RL02)
DM: P DM disk handler (RK06/RK07)
DU[n]: P DU handler (MSCP disk or diskette)
DW: P DW disk handler (RDxx)
DX[n]: P DX diskette handler (RX01)
DY[n]: P DY diskette handler (RX02)
DZ[n]: P DZ diskette handler (RX50 for the Professional 300
series processor)
EDIT T Default editor
EL: T Error Logger under the single-job monitors
ERROR T Severity level of failure that aborts a command file
EXIT T Use of SWAP.SYS
FORTRA T Default FORTRAN compiler
RT–11 Command Descriptions 217