--- MITgcm/eesupp/inc/CPP_EEOPTIONS.h	1999/05/21 21:57:44	1.12
+++ MITgcm/eesupp/inc/CPP_EEOPTIONS.h	2000/03/14 16:16:01	1.13
@@ -1,4 +1,4 @@
-C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/eesupp/inc/CPP_EEOPTIONS.h,v 1.12 1999/05/21 21:57:44 adcroft Exp $
+C $Header: /home/ubuntu/mnt/e9_copy/MITgcm/eesupp/inc/CPP_EEOPTIONS.h,v 1.13 2000/03/14 16:16:01 adcroft Exp $
 C
 C     /==========================================================\
 C     | CPP_EEOPTIONS.h                                          |
@@ -111,6 +111,17 @@
 #define ALLOW_SYNC_COMMUNICATION
 #undef  ALWAYS_USE_SYNC_COMMUNICATION
 
+C--   Control use of JAM routines for Artic network
+C     These invoke optimized versions of "exchange" and "sum" that
+C     utilize the programmable aspect of Artic cards.
+#undef  LETS_MAKE_JAM
+#undef  JAM_WITH_TWO_PROCS_PER_NODE
+#ifdef LETS_MAKE_JAM
+#define _JAMEXT _jam
+#else
+#define _JAMEXT
+#endif
+
 C--   Control storage of floating point operands
 C     On many systems it improves performance only to use
 C     8-byte precision for time stepped variables.