User`s guide

Keyword Type Function
performed depends on the device referenced.
FCLOSE PI Close the disk file, graphics window, or graphics icon
currently open on the specified logical unit.
FCMND PI Generate a device-specific command to the
input/output device specified by the logical unit.
FEMPTY PI Empty any internal buffers in use for a disk file or a
graphics window by writing the buffers to the file or
window if necessary.
FOPENR PI Open a disk file for read-only.
FOPENW PI Open a disk file for read-write.
FOPENA PI Open a disk file for read-write-append.
FOPEND PI Open a disk directory for read.
FSEEK PI Position a file open for random access and initiate a
read operation on the specified record.
GETC RF Return the next character (byte) from a device or
input record on the specified logical unit.
IOGET_ RF Return a value from a device on the VME bus.
$IOGETS SF Return a string value from a device on the VME bus.
IOPUT_ PI Write a value to a device on the VME bus.
IOSTAT RF Return status information for the last input/output
operation for a device associated with a logical unit.
IOTAS RF Control access to shared devices on the VME bus.
KERMIT.RETRY P Establish the maximum number of times the (local)
Kermit driver should retry an operation before
reporting an error.
Summary of I/O Operations
V+Language User's Guide, v17.0
Page 240