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15.4.1 Not Supported in MVS
15.4.1.1 MEDIUM
Physical and logical unit type. This option is ignored by the MVS compiler. The
error severity is 8 and gives correct execution. In MVS PL/I the name of the DD
statement (DDname) is the name of the file as specified in the DCL. If some
other name must be used, it can be supplied via the TITLE option on the OPEN
statement.
15.4.1.2 FUNCTION
This option defines the type of operation to be carried out on a 3525, 2560 or
5425. It is ignored in MVS. The error severity is 8 and gives correct execution. If
the function exists in MVS, it will be specified in the sub-parameter FUNC of the
DCB parameter of the DD statement.
15.4.1.3 ASSOCIATE
This option corresponds to the multiple functions on the 3525. The functions
required will be specified in the JCL by the sub-parameters FUNC and AFF of the
DCB parameter in the DD statement.
Note: The use of this parameter in MVS PL/I causes an error of severity 12
(serious). Use of this option prohibits the use of spooling.
15.4.1.4 RCE (Read Column Eliminate)
This option is specified in the DCB by the parameter MODE=ER or MODE=CR.
A statement FORMAT (nl,n2),(n3,n4) must precede the data in the input stream.
Use of this option prohibits the use of spooling.
15.4.1.5 OMR (Optical Mark Read)
This option disappears and re-appears in the DCB: MODE= EO or MODE=CO. It
is used for reading optical marks on the 3525, and prohibits the use of spooling.
15.4.1.6 COLBIN
This option is suppressed in MVS PL/I and the equivalent function is supplied to
MVS by the sub-parameter MODE=C in the DCB.
15.4.1.7 STACKER
This option is withdrawn from the MVS compiler and supplied by using ASA or
machine control characters: CTLASA or CTL360 in PL/I, or equally well
RECFM=FBA or RECFM=FBM in the DCB.
15.4.1.8 CMDCHN WTRPROT FILESEC NOFEED VOLSEQ
Options for handling 3540 diskettes, which are not supported by MVS PL/I.
15.4.1.9 UNLOAD
This option does not exist in MVS. The unloading of tapes after a CLOSE is
determined by the DISP= parameter of the DD statement.
Chapter 15. PL/I 339