When I was preparing the release of the linux-friendly version of everything, it looks
like I accidentally reverted to an earlier version of tailgunner.  I've since put right
most of the things that I've noticed had reverted, but the current executable is rather
flickery and plays slower than I remember.  I wonder if by accident it is playing at
30Hz.  I'll look into that but for now have to put this aside and get on with the rest
of the release.


=========
compare /home/pi/BACKUP/pitrex12c/tailgunner/ops.c

Should we be using ops.c or tailgunr-ops.c?  Currently the makefile links
with ops.c but tailgunr-ops.c has the updated MULS optimisation.
 - proper version includes tailgunr-ops.c from ops.c ...
 
laser handling....  is this an out of date version???

YES.  /home/pi/src/pitrex12c/tailgunner is significantly updated

lasers and MUL optimisation for a start...

Check at least these:

diff -r ./build.baremetal/tailgunner.img.s /home/pi/src/pitrex12c/tailgunner/build.baremetal/tailgunner.img.s
diff -r ./externs.h /home/pi/src/pitrex12c/tailgunner/externs.h
diff -r ./Makefile.baremetal /home/pi/src/pitrex12c/tailgunner/Makefile.baremetal
diff -r ./Makefile.raspbian /home/pi/src/pitrex12c/tailgunner/Makefile.raspbian
diff -r ./mdep.i /home/pi/src/pitrex12c/tailgunner/mdep.i
diff -r ./ops.c /home/pi/src/pitrex12c/tailgunner/ops.c
diff -r ./tailgunner.c /home/pi/src/pitrex12c/tailgunner/tailgunner.c
diff -r ./tailgunner-data.i /home/pi/src/pitrex12c/tailgunner/tailgunner-data.i

STILL TO PATCH:

case 0x1af3:

  // general printing routine
  //fprintf(stderr, "X=%d Y=%d E=%d F=%d RTS=%04x\n", ram[3], ram[4], ram[14], ram[15], ram[0]);
  if (ram[4] >= 600) ram[4] += 220; // raise 'SCORE' etc
  if (ram[4] <= 50) ram[4] -= 50;   // lower 'CREDITS' as far as possible

      /* Invariants: register_P = 0x0 register_I = 0x00 */;
      /* opLDAdir_A_AA (a3) */
      cmp_old = flag_C = acc_a0 = register_A; /* store old acc */
      register_A = cmp_new = ram[register_I = 0x03]; /* set I register */

...
this has been moved more cleanly into tailgunner.c:

      ToY -= FromY;
      ToY = ((signed short int)(((signed short int)ToY) >> (signed short int)vgShiftLength)) /* SAR */;
      ToY += FromY;

      /* render the line */
#ifndef DUALCPU
      CinemaVectorData (FromX, FromY, ToX, ToY, vgColour);
#endif

      }

case 0x1454:
---
      ToY -= FromY;
      ToY = ((signed short int)(((signed short int)ToY) >> (signed short int)vgShiftLength)) /* SAR */;
      ToY += FromY;


      // todo
      // them intro plaque and letters are displayed here
      // possible hint is
      // before each letter add a zero ref!
      // clue would be the number of prints done per round
      // if pinrt == 8 zero ref
      // if print == 8 +2 zero ref etc...

 // this also gives hints where not needed
 // the intro ships...
 // must test some RAM location - but I have no memory map , and no correct disassembly

      plaqueCounter++;
      int force = 0;
      if ( (plaqueCounter == 9) || // after retangles -> T
        (plaqueCounter == 11) ||   // -> A
        (plaqueCounter == 14) ||   // -> IL
        (plaqueCounter == 17) ||   // -> R
        (plaqueCounter == 23) ||   // -> E
        (plaqueCounter == 27) ||   // -> N
        (plaqueCounter == 30) ||   // -> N
        (plaqueCounter == 33) ||   // -> U
        (plaqueCounter == 36)      // -> G
      )
        {
          force = PL_BASE_FORCE_ZERO | PL_BASE_FORCE_RESET_ZERO_REF;
        }
        /* render the line */
#ifndef DUALCPU
      CinemaVectorDataHinted (FromX, FromY, ToX, ToY, vgColour, force);
#endif

      }

case 0x1454: