Get_Immediate ¶"The
Get_Immediateprocedures should be implemented with unbuffered input. For a device such as a keyboard, input should be available if a key has already been typed, whereas for a disk file, input should always be available except at end of file. For a file associated with a keyboard-like device, any line-editing features of the underlying operating system should be disabled during the execution ofGet_Immediate."
Followed on all targets except VxWorks. For VxWorks, there is no way to
provide this functionality that does not result in the input buffer being
flushed before the Get_Immediate call. A special unit
Interfaces.Vxworks.IO is provided that contains routines to enable
this functionality.