MPE/iX Intrinsics Reference Manual (32650-90875)
Chapter 5 127
Command Definitions (FCONTROL - FLOCK)
FCONTROL
(KSAM) Not used for KSAM XL files. For KSAM/3000 files, it clears the
key and data buffers of all information and reads the first 2 sectors of the
key file from disk to buffer.
8/U16 Space backward to tape mark:
On unlabeled tapes, moves a magnetic tape backward until a tape mark is
encountered. If used on labeled tapes, the tape is positioned at the
beginning of user header labels, if any. Rejected for spooled DATA tapes.
Item
is ignored.
(KSAM) Not used for KSAM files.
9/U16 Rewind and unload tape:
Repositions a magnetic tape file at its beginning and places the tape
offline. Not allowed for labeled tapes. Rejected for spooled DATA tapes and
labeled magnetic tape files.
Item
is ignored.
10/U16 Change line speed of a device:
Passes a value specifying a new line speed for both input and output.
The value passed must be expressed in characters per second (1 character
per second = 10-bits per second). The supported choices are:
30 (300 bps)
120 (1200 bps)
240 (2400 bps)
960 (9600 bps)
1920 (19200 bps)
Any setting other than those listed returns CCL (1).
The speed associated with the device must match the physical speed
settings of the device/modem. If the speed setting is changed
programmatically, a request that the speed setting of the device be
manually changed should be made.
If issued against a terminal connected through PAD, CCE (2) is returned,
but there is no effect on the transmission speed, and a meaningless value
is returned in
item
.
When a device is initially opened programmatically, the speed is set to the
default device speed. If the device is opened as a logon device (configured
with speed and parity sensing enabled), the speed setting is sensed from
the first carriage return character received. The default device speed is
configured through the Node Management Configuration Manager
(NMMGR) or the OpenView DTC Manager (networks managed by an
OpenViewworkstation). Reconfigure the device to permanently change the
speed.
Not reset in break mode; not reset after FCLOSE.