Asynchronous Serial Communications Programmer's Reference Manual (32022-90052)

Chapter 9 235
Intrinsics Reference (cont)
FGETINFO
=110 The actual file designator is $NULL.
Bits (8:2)—Record format
foption .
These bits are not meaningful for asynchronous devices
since all records are of undefined length. However, if
redirection was anticipated, “fixed-length” may have
been specified.
=00 Fixed-length records.
=01 Variable-length records.
=10 Undefined-length records.
=11 Spoolfile.
Bit (7:1)—Carriage control
foption .
=0 No carriage control character expected.
=1 Carriage Control character expected.
Bit (6:1)—MPE/iX tape label
foption .
Not meaningful for asynchronous devices, but may
have been set if file redirection was anticipated.
=0 Nonlabeled tape.
=1 Labeled tape.
Bits (5:1)—Disallow :FILE equation
foption .
If this bit is set to 1, any :FILE equation intended to
override the specifications set through the FOPEN or
HPFOPEN call will be ignored.
=0 Allow :FILE command
=1 Disallow :FILE command.
Bits (2:3)—File type
foption .
Will be set to 000 for asynchronous devicefiles.
=000 Standard file (STD).
=001 Keyed Sequential Access Method file
(KSAM).
=010 Relative I/O file (RIO).
=100 Circular file (CIR).
=110 Message file (MSG).
Bits (0:2)—Reserved for MPE/iX. These should be set
to 0.