1 HPX
 HPX transfers data files  between  the  computer  and  the  HP2648a  terminal
 display or tape cartridges.  Four types of command are available:

     Copy disk file(s) to terminal device(s):
         >HPX device-spec[s]=input_files[/AS][/BI]

     Copy from terminal device to disk file:
         >HPX output-file[/SP][/AP]=device-spec[/AS][/BI]

     Compare device with disk file:
         >HPX file[/SP]=device-spec[/AS][/BI]/CMP

     Position tape only:
         >HPX [/RT:n][/LT:n]

 HPX does not support intra-device transfers, as these can be done locally.

 Valid devices are:  /DI = screen display, /LT = left tape, /RT = right tape.

 See HELP HPX DEVICES for further details on device selection and control.
 See HELP HPX SWITCHES for information on other switches.
2 DEVICES
 device-specs are:

    /DI     Screen display
    /LT:n   File n on left tape (default n = next file)
              unsigned n is absolute,
              signed n is relative to current position.
    /LT:A   Append to end of last file on tape.
    /LT:C   Condition tape and rewind to first file.
    /LT:E   Start a new file after last file on tape.
    /LT:R   Rewind tape to start at first file.
    /RT:x   As above, for right tape.
    /PR     Printer
2 SWITCHES
 See HELP HPX DEVICES for device specifications.  Other switches are:

    /AS     ASCII data to be transferred = /-BI [default]
    /BI     Binary transfer mode required = /-AS
    /FO     Flag output file as having FORTRAN carriage-control
    /SP     Spool output file to printer
    /AP     Append output to existing file
    /LA     Latch current switch settings for next command line
    /WBR    Use write-backspace-read mode [default = /-WBR = don't]
    /CMP    This is a compare operation [default = /-CMP = copy operation]
    /LI     List file(s) copied if wildcards or 1 input file [default]
    /-LI    Don't list file(s), even if wildcards etc.
    /EL     Reset character set and/or emphasis at end of ASCII lines [/-EL]
