MODIFICATIONS beyond PLOT3D Version 3.6 are:

1. Fixed bug in INV2X2 ("S(3)" to "S(2)").
   Date: 14 February 1989
   Version: 3.6a
   Routines: INV2X2

2. Fixed bug in VECCM1 ("ISHAPT" to "ISHPAT").
   Date: 14 February 1989
   Version: 3.6a
   Routines: VECCM1

3. Changed READQ so that call to NEWPTR for variable "Q" has correct IRECN
   whether we're using binary or FORTRAN I/O.
   Date: 6 March 1989
   Version: 3.6a
   Routines: READQ

4. Added Bob Moser's modifications to PSDRW for TeX and DVIALW.
   Date: 8 March 1989
   Version: 3.6a
   Routines: PSDRW (IRIS2, IRIS2_RGLA/LOCAL)

5. Fixed bug in FBSYMB for PostScript screen draw with symbols.
   Date: 9 March 1989
   Version: 3.6a
   Routines: FBSYMB (IRIS2, IRIS2_RGLA/LOCAL)

6. Added overflow check to CONMAN, manual contour level entry.  Modified
   overflow checks for subsets, walls, and rakes (SUBSAD,WALSAD,RAKIJK,
   RAKXYZ).
   Date: 30 March 1989
   Version: 3.6b
   Routines: CONMAN,SUBSAD,WALSAD,RAKIJK,RAKXYZ

7. Installed new code from Diana Choi for the Seiko screen dumps.  The
   following files were updated: iris2c.c, Makefile.i2, Makefile.i4,
   and Makefile.i4gt.  The following files were added: newimglib.c and
   pixio.h.  There are no references to "port.h", and all references to
   "1024" have been replaced with "XMAXSCREEN+1".
   Date: 11 April 1989
   Version: 3.6b
   Routines: SCRSAVE.C (IRIS2 and IRIS2_RGLA/LOCAL)

8. Changed one reference to PTITLE which should have been PADTXT in PLTSHO.
   Date: 4 May 1989
   Version: 3.6b
   Routines: PLTSHO
