c---
c  variable declarations

      integer*2 FirstFld, LastFld
      integer*2 Row, Col, CurField, TermKeys(30)
      integer*2 NumberOfFields
      integer*2 LastKey, FieldNumber
      logical*1 Next, Previous, Exit, Refresh, Valid

      character*  4 Version
      character*  9 Date
      character*  6 GroupID
      character*  3 Operator
      character* 65 Description(  3)
      integer*2 ScanRate
      character*  6 StageVelocity

c---
c Normal termination on F1 key
c immediate termination on F2 key
      data TermKeys/ 1, 141, 1, 142, 26*0 /

c---
c Default variable initialization
      data Version /' '/
      data Date /' '/
      data GroupID /' '/
      data Operator /' '/
      data Description(1) /' '/
      data Description(2) /' '/
      data Description(3) /' '/
      data ScanRate /0/
      data StageVelocity /' '/

c---
c Screen origin
      data Row, Col / 1, 1 /

c---
c TTY initialization
      call TTYinit
      call EchoOff
      call KpdOn

c---
c Starting edit field
      CurField = 1

c---
c Total number of screen parameters

      NumberOfFields =   9

c---
c Default limits

      FirstFld = 1
      LastFld = NumberOfFields


c---
c Clear the screen region

 10     call GROUPClear( Row, Col )

c---
c Display the Text fields

      call GROUPTextDsp( Row, Col )

c---
c Display the Data fields

      call GROUPDataDsp( Row, Col, FirstFld, LastFld
     1, Version, Date, GroupID, Operator, Description, ScanRate
     1, StageVelocity
     1 )


c---
c Edit the Data fields

 20     call GROUPEdit( Row, Col, FirstFld, LastFld, CurField, TermKeys
     1, Version, Date, GroupID, Operator, Description, ScanRate
     1, StageVelocity
     1, Next, Previous, Exit, Refresh, LastKey )



      if( Refresh ) then
          goto 10
      else if( Next ) then
          CurField = 1
          goto 20
      else if( Previous ) then
          CurField = NumberOfFields
          goto 20
      else if( .not. Exit ) then
          goto 20
      end if


c---
c Validate the Data fields

      call GROUPValidate( FirstFld, LastFld
     1, Version, Date, GroupID, Operator, Description, ScanRate
     1, StageVelocity
     1, Valid, FieldNumber )

      if( .not. Valid ) then
          CurField = FieldNumber
          goto 20
      end if

      call TTYinit
      call EchoOn
      call KpdOff

      End