--- freem/src/frmgbl.c	2025/05/16 04:42:02	1.18
+++ freem/src/frmgbl.c	2025/05/18 18:15:38	1.20
@@ -1,5 +1,5 @@
 /*
- *   $Id: frmgbl.c,v 1.18 2025/05/16 04:42:02 snw Exp $
+ *   $Id: frmgbl.c,v 1.20 2025/05/18 18:15:38 snw Exp $
  *    freem global C variables
  *
  *  
@@ -24,6 +24,12 @@
  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
  *
  *   $Log: frmgbl.c,v $
+ *   Revision 1.20  2025/05/18 18:15:38  snw
+ *   Add ZEDIT command for editing routines
+ *
+ *   Revision 1.19  2025/05/16 13:22:58  snw
+ *   Bump version to account for shared memory changes
+ *
  *   Revision 1.18  2025/05/16 04:42:02  snw
  *   Fix macOS port
  *
@@ -561,8 +567,8 @@ char    curdir[256] = ".";      /* curre
 char    startuprou[PATHLEN] = "\201";   /* start up routine from cmdline*/
 
 char    zcommds[256] =
-" za zb zc zd zg zh zi zj zl zm zn zp zq zr zs zth ztr zwa zwi zwr zassert zbreak \
-zconst zgo zhalt zinsert zjob zload zmap znamespace zprint zquit zremove zsave zthrow ztrap zunmap zwatch zwith zwrite \201";  /* intrinsic z-commands */
+" za zb zc ze zg zh zi zj zl zm zn zp zq zr zs zth ztr zwa zwi zwr zassert zbreak \
+zconst zedit zgo zhalt zinsert zjob zload zmap znamespace zprint zquit zremove zsave zthrow ztrap zunmap zwatch zwith zwrite \201";  /* intrinsic z-commands */
 char    zfunctions[256] =       /* intrinsic z-functions */
 " zb zc zd ze zh zht zk zl zm zn zo zp zr zs zt zboolean zcall zcr zcrc zdata zdate zedit zhorolog \
 zkey zlength zlsd zname znext zorder zpiece zprevious zreplace zsyntax zsort ztime \201";
@@ -676,15 +682,9 @@ short debug_mode = FALSE;
 int lasterr[NESTLEVLS + 1];
 
 short first_process = FALSE;
-#if defined(__FreeBSD__)
- size_t shm_init_size = 4194304;
-#else
-# if !defined(__APPLE__)
- size_t shm_init_size = 16777216;
-# else
- size_t shm_init_size = 2048576;
-#endif
-#endif
+size_t shm_init_size = 16777216; /* initial size of SysV shared memory segment (16M + overhead);
+                                    requires a kernel shmmax (or equivalent) parameter of at least
+                                    17002496 */
 short inrpt_after_async = FALSE;
 
 void unnew (void)