diff --git a/CMakeLists.txt b/CMakeLists.txt
index a450b561a..9982c738a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -180,6 +180,7 @@ set (wsjt_FSRCS
   lib/ccf2.f90
   lib/ccf65.f90
   lib/chkhist.f90
+  lib/chkmsg.f90
   lib/chkss2.f90
   lib/coord.f90
   lib/db.f90
@@ -609,6 +610,9 @@ endif (WIN32)
 add_executable (jt9sim lib/jt9sim.f90 wsjtx.rc)
 target_link_libraries (jt9sim wsjt)
 
+add_executable (jt65code lib/jt65code.f90 wsjtx.rc)
+target_link_libraries (jt65code wsjt)
+
 add_executable (jt9code lib/jt9code.f90 wsjtx.rc)
 target_link_libraries (jt9code wsjt)
 
@@ -673,7 +677,7 @@ install (TARGETS wsjtx
   #COMPONENT Runtime
   )
 
-install (TARGETS jt9
+install (TARGETS jt9 jt65code jt9code
   RUNTIME DESTINATION ${WSJT_BIN_DESTINATION}
   LIBRARY DESTINATION ${WSJT_LIB_DESTINATION}
   BUNDLE DESTINATION ${WSJT_BIN_DESTINATION}
diff --git a/manpages/CMakeLists.txt b/manpages/CMakeLists.txt
index b078b3720..525bfa4c0 100644
--- a/manpages/CMakeLists.txt
+++ b/manpages/CMakeLists.txt
@@ -1,5 +1,6 @@
 set (ASCIIDOC_MANS
   man1/wsjtx.1.txt
+  man1/jt65code.1.txt
   )
 
 find_program (A2X_EXECUTABLE NAMES a2x a2x.py)
diff --git a/manpages/man1/jt65code.1.txt b/manpages/man1/jt65code.1.txt
new file mode 100644
index 000000000..3d9ff18ff
--- /dev/null
+++ b/manpages/man1/jt65code.1.txt
@@ -0,0 +1,97 @@
+:doctype: manpage
+:man source: AsciiDoc
+:man version: {revnumber}
+:man manual: WSJT-X Manual
+= jt65code(1)
+
+== NAME
+
+jt65code, jt9code - Weak signal communications encoding support utility.
+
+== SYNOPSIS
+
+*jt65code* MESSAGE
+*jt9code* MESSAGE
+
+== DESCRIPTION
+
+*jt65code* and *jt9code* are utility programs that let you explore the
+conversion of user-level messages into channel symbols or “tone
+numbers.” These programs can be useful to someone designing a beacon
+generator for JT9 or JT65, or for studying behavior of the
+error-control codes.
+
+Channel-symbol values for JT9 run from 0 to 8, with 0 representing the
+sync tone. The total number of symbols in a transmitted message is
+85. To run jt9code, enter the program name followed by a JT9 message
+enclosed in quotes. In Windows the command and program output might
+look like this:
+
+$ jt9code "G0XYZ K1ABC FN42"
+Message:   G0XYZ K1ABC FN42
+Channel symbols:
+ 0 0 7 3 0 3 2 5 4 0 1 7 7 7 8 0 4 8 8 2 2 1 0 1 1 3 5 4 5 6
+ 8 7 0 6 0 1 8 3 3 7 8 1 1 2 4 5 8 1 5 2 0 0 8 6 0 5 8 5 1 0
+ 5 8 7 7 2 0 4 6 6 6 7 6 0 1 8 8 5 7 2 5 1 5 0 4 0
+Decoded message: G0XYZ K1ABC FN42
+
+For the corresponding program jt65code only the information-carrying
+channel symbols are shown, and the symbol values range from 0 to
+63. Sync synbols lie two tone intervals below data tone 0, and the
+sequential locations of sync symbols are described in the JT65
+Protocol section of this Guide.
+
+A typical execution of jt65code is shown below. The program displays
+the packed message of 72 bits, shown here as 12 six-bit symbol values,
+followed by the channel symbols:
+
+$ jt65code "G0XYZ K1ABC FN42"
+Message:   G0XYZ K1ABC FN42
+Packed message, 6-bit symbols:  61 36 45 30  3 55  3  2 14  5 33 40
+Information-carrying channel symbols:
+   56 40  8 40 51 47 50 34 44 53 22 53 28 31 13 60 46  2 14 58 43
+   41 58 35  8 35  3 24  1 21 41 43  0 25 54  9 41 54  7 25 21  9
+   62 59  7 43 31 21 57 13 59 41 17 49 19 54 21 39 33 42 18  2 60
+Decoded message: G0XYZ K1ABC FN42
+
+For an illustration of the power of the strong error-control coding in
+JT9 and JT65, try looking at the channel symbols after changing a
+single character in the message. For example, change the grid locater
+from FN42 to FN43 in the JT65 message:
+
+$ jt65code "G0XYZ K1ABC FN43"
+Message:   G0XYZ K1ABC FN43
+Packed message, 6-bit symbols:  61 36 45 30  3 55  3  2 14  5 33 41
+Information-carrying channel symbols:
+   25 35 47  8 13  9 61 40 44  9 51  6  8 40 38 34  8  2 21 23 30
+   51 32 56 39 35  3 50 48 30  8  5 40 18 54  9 24 30 26 61 23 11
+    3 59  7  7 39  1 25 24  4 50 17 49 52 19 34  7  4 34 61  2 61
+Decoded message: G0XYZ K1ABC FN43
+
+You will discover that every possible JT65 message differs from every
+other possible JT65 message in at least 52 of the 63
+information-carrying channel symbols.
+
+WSJT-X home page:: http://www.physics.princeton.edu/pulsar/K1JT/wsjtx.html
+
+WSJT-X User's Guide:: http://www.physics.princeton.edu/pulsar/K1JT/wsjtx-doc/wsjtx-main.html
+
+== OPTIONS
+
+== FILES
+
+== AUTHOR
+
+Joe Taylor, K1JT.
+
+== COPYING
+
+*jt65code* and *jt9code* are Copyright (C) 2001 - 2014 by Joseph
+H. Taylor, Jr., K1JT, with contributions from additional authors.
+WSJT-X is Open Source software, licensed under the GNU General Public
+License (GPLv3).
+
+These programs are distributed in the hope that they will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.