diff --git a/scp.c b/scp.c
index ded01712..ebaced05 100644
--- a/scp.c
+++ b/scp.c
@@ -1333,7 +1333,9 @@ static const char simh_help1[] =
       "+SET NOLOG                   disables any currently active logging\n"
       "4Switches\n"
       " By default, log output is written at the end of the specified log file.\n"
-      " A new log file can created if the -N switch is used on the command line.\n"
+      " A new log file can created if the -N switch is used on the command line.\n\n"
+      " By default, log output is written in text mode.  The log file can be\n"
+      " opened for binary mode writing if the -B switch is used on the command line.\n"
 #define HLP_SET_DEBUG  "*Commands SET Debug"
        /***************** 80 character line width template *************************/
       "3Debug\n"
diff --git a/sim_console.c b/sim_console.c
index 487c3dac..068ee78b 100644
--- a/sim_console.c
+++ b/sim_console.c
@@ -2227,7 +2227,8 @@ cptr = get_glyph_nc (cptr, gbuf, 0);                    /* get file name */
 if (*cptr != 0)                                         /* now eol? */
     return SCPE_2MARG;
 sim_set_logoff (0, NULL);                               /* close cur log */
-r = sim_open_logfile (gbuf, FALSE, &sim_log, &sim_log_ref); /* open log */
+r = sim_open_logfile (gbuf, (sim_switches & SWMASK ('B')) == SWMASK ('B'), 
+                            &sim_log, &sim_log_ref);    /* open log */
 if (r != SCPE_OK)                                       /* error? */
     return r;
 if ((!sim_quiet) && (!(sim_switches & SWMASK ('Q'))))