User`s guide

SET DYx
(DY)
Sets the specified unit of the DY diskette handler (RX02 diskettes).
Format
SET DYx condition
Condition
[NO]WRITE
WRITE, the default, write enables DY unit x. NOWRITE write locks DY unit x.
NOWRITE affects both the memory copy and the disk file of the handler.
RT–11 Command Descriptions 233