SEN -- Send packets:   >SEN task/sw1..../swn


 /BY/OC,/DC  Send oct/dec bytes        /WO/OC,/DC Send oct/dec words
 /RA         Send RAD50 words          /AS        Send ascii bytes
 /SD         Send normal packet        /SR        Send ref. packet
 /HE or ?    Display HELP text         /DA:xxx    Specify data (last switch)


             Default switches :  /BY/OC/SD


  /          Change from command to data mode and vice versa.
  // or ^Z   Exit SEN


  Data:    <bl>  = space(s) and/or Tab(s)
           <sep> = [ <bl> ] , or : [ <bl> ]
           <st>  =  " or  '  or \


     /WO,/BY /DC :   8<sep>9<sep>10 ...
     /WO,/BY /OC :   10<sep>11<sep>12 ...   or   8.<sep>9.<sep>10. ...
     /RA         :   3_RAD50_char<sep>3_RAD50_char ...
                               A..Z, 0..9, $ and . ( _ and # for space )
     /AS         :   <st>string<st><sep><st> ...
                              and/or 8.<sep>10<sep>10. ...
