Send m_i3, m_n3, m_isync from mainwindow to genft8.f90 and use these to determine the type of generated message, according to the scheme described in lib/77bit/NewCode.txt.

lib/ft8/foxgen.f90

@@ -58,7 +58,7 @@ subroutine foxgen()
         msg=cmsg(n)(1:i1)//cmsg(n)(i2+1:i3-2)//'                   '
         read(cmsg(n)(i4+2:i4+4),*) irpt
      endif
-     call genft8(msg,mygrid,bcontest,0,1,msgsent,msgbits,itone)
+     call genft8(msg,mygrid,bcontest,0,1,1,msgsent,msgbits,itone)
 !     print*,'Foxgen:',n,cmsg(n),msgsent
 
      if(i3b.eq.1) then

lib/ft8/ft8apset.f90

@@ -16,9 +16,10 @@ subroutine ft8apset(mycall12,mygrid6,hiscall12,hisgrid6,bcontest,apsym)
   hisgrid=hisgrid6(1:4)
   if(index(hisgrid," ").eq.0) hisgrid="AA00"
   msg=mycall//' '//hiscall//' '//hisgrid
-  i3=-1                                       ! ### TEMPORARY ??? ###
+  i3=0                                       ! ### TEMPORARY ??? ###
   n3=0 !TEMPORARY
-  call genft8(msg,mygrid6,bcontest,i3,n3,msgsent,msgbits,itone)
+  isync=1
+  call genft8(msg,mygrid6,bcontest,i3,n3,isync,msgsent,msgbits,itone)
   apsym=2*msgbits-1
   return
 end subroutine ft8apset

lib/ft8/ft8b_1.f90

@@ -381,9 +381,10 @@ subroutine ft8b_1(dd0,newdat,nQSOProgress,nfqso,nftx,ndepth,lapon,lapcqonly,   &
         call extractmessage174(decoded,message,ncrcflag)
         decoded=decoded0
 ! This needs fixing for messages with i3bit=1:  
-        i3=-1  !TEMPORARY  
+        i3=0  !TEMPORARY  
         n3=0 
-        call genft8(message,mygrid6,bcontest,i3,0,msgsent,msgbits,itone)
+        isync=1   
+        call genft8(message,mygrid6,bcontest,i3,n3,isync,msgsent,msgbits,itone)
         if(lsubtract) call subtractft8(dd0,itone,f1,xdt2)
         xsig=0.0
         xnoi=0.0

lib/ft8/genft8.f90

@@ -1,4 +1,4 @@
-subroutine genft8(msg,mygrid,bcontest,i3,n3,msgsent,msgbits,itone)
+subroutine genft8(msg,mygrid,bcontest,i3,n3,isync,msgsent,msgbits,itone)
 
 ! Encode an FT8 message, producing array itone().
   
@@ -17,17 +17,9 @@ subroutine genft8(msg,mygrid,bcontest,i3,n3,msgsent,msgbits,itone)
   integer icos7(0:6)
   data icos7/2,5,6,0,4,1,3/                   !Costas 7x7 tone pattern
 
-  itype=1
+  if(isync.eq.2 ) goto 900
-  if( ( i3.eq.0 .and. n3.ge.1) .or. i3.ge.1 ) itype=2
 
-!write(*,*) 'generating type ',itype,' message'
+  call packmsg(msg,i4Msg6BitWords,istdtype,bcontest) !Pack into 12 6-bit bytes
-!write(*,*) 'msg ',msg,i3,n3
-
-  if(itype.eq.2 ) goto 900
-  i3=i3*i3
-  n3=n3*n3
-
-  call packmsg(msg,i4Msg6BitWords,itype,bcontest) !Pack into 12 6-bit bytes
   call unpackmsg(i4Msg6BitWords,msgsent,bcontest,mygrid) !Unpack to get msgsent
 
   write(cbits,1000) i4Msg6BitWords,32*i3

mainwindow.cpp

@@ -77,7 +77,7 @@ extern "C" {
               fortran_charlen_t);
 //  float s[], int* jh, char line[], char mygrid[],
 
-  void genft8_(char* msg, char* MyGrid, bool* bcontest, int* i3, int* n3, char* msgsent,
+  void genft8_(char* msg, char* MyGrid, bool* bcontest, int* i3, int* n3, int* isync, char* msgsent,
                char ft8msgbits[], int itone[], fortran_charlen_t, fortran_charlen_t,
                fortran_charlen_t);
 
@@ -3479,11 +3479,13 @@ void MainWindow::guiUpdate()
             if(m_config.bFox() and ui->tabWidget->currentIndex()==2) {
               foxTxSequencer();
             } else {
-              m_i3=-1;  // Temporary!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+              m_i3=0;  // Temporary!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
               m_n3=0;
+              m_isync=1;
+//              if(m_config.bGenerate77()) m_isync=2;
               char ft8msgbits[75 + 12]; //packed 75 bit ft8 message plus 12-bit CRC
-              genft8_(message, MyGrid, &bcontest, &m_i3, &m_n3, msgsent, const_cast<char *> (ft8msgbits),
+              genft8_(message, MyGrid, &bcontest, &m_i3, &m_n3, &m_isync, msgsent, 
-                      const_cast<int *> (itone), 22, 6, 22);
+                      const_cast<char *> (ft8msgbits), const_cast<int *> (itone), 22, 6, 22);
               if(m_config.bFox()) {
                 QString fm = QString::fromStdString(message).trimmed();
                 foxGenWaveform(0,fm);

mainwindow.h

@@ -423,6 +423,7 @@ private:
   qint32  m_wait;
   qint32  m_i3;
   qint32  m_n3;
+  qint32  m_isync;
   qint32  m_isort;
   qint32  m_max_dB;
   qint32  m_nDXped=0;