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

Chapter 9 261
Intrinsics Reference (cont)
HPFOPEN
Item# = 7 Carriage Control Option (I32)
Passes a value indicating whether or not you will
supply a carriage control directive in the calling
sequence of each FWRITE call that writes records to
the file.
0 No carriage control directive is
expected (NOCCTL).
1 Carriage control directives are
expected (CCTL).
A carriage control character passed through the
controlcode parameter of FWRITE is recognized as
such and acted upon only for files that have carriage
control specified in FOPEN.
A carriage control character sent to a file on which the
control cannot be executed directly (for example, line
spacing characters sent to a file spooled to disk) causes
the control character to be embedded as the first byte of
the record. Thus, the first byte of each record in such a
spooled file contains control information. Carriage
control characters sent to other types of files are sent to
the driver and acted upon directly.
Item# = 8 labeled tape label option (CA)
Not meaningful for asynchronous devices.
Item# = 9 Disallow file equation option (I32)
Passes a value indicating whether or not you wish to
allow MPE/iX file equations. Note that a leading * in a
formal file designator effectively overrides the disallow
option.
0 Allow :FILE equations to override
programmatic or system defined file
specifications.
1 Disallow :FILE equations from
overriding programmatic or system
defined file specifications.
Item# = 10 file type option (I32)
Set to 0 (standard file) for asynchronous devicefiles.
0 Standard file (STD).
1 Keyed Sequential Access Method file
(KSAM).
2 Relative I/O file (RIO).