diff --git a/BUGS b/BUGS
index 874fce8..e9887bf 100644
--- a/BUGS
+++ b/BUGS
@@ -96,8 +96,8 @@ Known bugs:
       the terminal in a 'bad' state, as if stty -icanon -echo -echoe
       had been executed.
 
-    * Dec Alpha Linux compiling with gcc-2.95.1 and -O2 fails the
-      regression test with:
+    * Dec Alpha Linux compiling with gcc-2.95.1 (or gcc-2.95.2) and
+      -O2 fails the regression test with:
 
 	make -s check
 	000: Beginning regression tests
diff --git a/CHANGES b/CHANGES
index c6ca8d2..224dd46 100644
--- a/CHANGES
+++ b/CHANGES
@@ -28,11 +28,10 @@ Following is the change from calc version 2.11.0t8.9.1 to date:
     The eval(str) builtin will return an error-value rather than cause
     an execution error str has a scan-error.
 
-    Declaration are permitted to end with EOF as well as a newline or ';'.
+    Declarations are permitted to end with EOF as well as a newline or ';'.
 
-    When prompt() occurs in reading a file, it will take inout from
-    the terminal rather than taking it from a file.  For example,
-    this script, when read, now works:
+    When prompt() occurs while reading a file, it will take input from
+    the terminal rather than taking it from a file.  For example:
 
 	/* This demonstrates the use of prompt() and some other things  */
 	config("verbose_quit", 0);
@@ -52,17 +51,38 @@ Following is the change from calc version 2.11.0t8.9.1 to date:
 	}
 	print "Good bye";
 
-    Comments entered at inputisterminal level may be spread over several
+    Comments entered at input terminal level may be spread over several
     lines.  For example:
 
 	/*
-	 * These commands work given the file: comment.cal
-	 *
+	 * Assume that this calc script is called: comment.cal
+	 * Then these commands now work:
 	 *	cat comment.cal | calc
 	 *	calc < comment.cal
 	 */
 	print "Hello";
 
+    Added:
+
+	-D calc_debug[:lib_debug:[user_debug]]
+
+    to set the initial value of config("calc_debug"), config("lib_debug")
+    and config("user_debug").
+
+    The : separated strings of -D are interpreted as signed 32 bit values.
+    After an optional leading sign a leading zero indicates octal
+    conversion, and a leading ``0x'' or ``0X'' hexadecimal conversion.
+    Otherwise, decimal conversion is assumed.
+
+    Reordered the config structure moving calc_debug ahead of lib_debug.
+
+    Added bits 4 and 5 to config("calc_debug"):
+
+	4	Report on changes to the state of stdin as well as changes
+		to internal variables that control the setting and restoring
+		of stdin.
+
+	5	Report on changes to the run state of calc.
 
 
 Following is the change from calc version 2.11.0t8 to 2.11.0t8.9:
diff --git a/calc.c b/calc.c
index d35cfff..d55818c 100644
--- a/calc.c
+++ b/calc.c
@@ -40,6 +40,7 @@
  * static definitions and functions
  */
 static char *usage = "usage: %s [-c] [-C] [-d] [-e] [-h] [-i] [-m mode]\n"
+		     "\t[-D calc_debug[:lib_debug:[user_debug]]]\n"
 		     "\t[-n] [-p] [-q] [-u] [-v] [[--] calc_cmd ...]\n";
 static void intint(int arg);	/* interrupt routine */
 
@@ -55,13 +56,14 @@ main(int argc, char **argv)
 	extern char *optarg;	/* option argument */
 	extern int optind;	/* option index */
 	int c;			/* option */
+	char *p;
 	long i;
 
 	/*
 	 * parse args
 	 */
 	program = argv[0];
-	while ((c = getopt(argc, argv, "Cehim:npquvcd")) != -1) {
+	while ((c = getopt(argc, argv, "Cehim:npquvcdD:")) != -1) {
 		switch (c) {
 		case 'C':
 #if defined(CUSTOM)
@@ -126,6 +128,26 @@ main(int argc, char **argv)
 			 */
 			printf("%s (version %s)\n", CALC_TITLE, version());
 			exit(0);
+		case 'D':
+			/*
+			 * parse the -D optarg
+			 *
+			 * Could be calc_debug
+			 *	 or calc_debug:lib_debug
+			 *	 or calc_debug:lib_debug:user_debug
+			 */
+			calc_debug = optarg;
+			p = strchr(optarg, ':');
+			if (p != NULL) {
+				*p = '\0';
+				lib_debug = p+1;
+				p = strchr(lib_debug, ':');
+				if (p != NULL) {
+					*p = '\0';
+					user_debug = p+1;
+				}
+			}
+			break;
 		default:
 			/*
 			 * we are too early in processing to call
@@ -185,6 +207,8 @@ main(int argc, char **argv)
 	 */
 	libcalc_call_me_first();
 	stdin_tty = isatty(0);		/* assume stdin is on fd 0 */
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: stdin_tty is %d\n", stdin_tty);
 	if (want_defhelp) {
 		givehelp(DEFAULTCALCHELP);
 		libcalc_call_me_last();
@@ -239,9 +263,17 @@ main(int argc, char **argv)
 	 */
 	if (run_state == RUN_BEGIN) {
 		if (!q_flag && allow_read) {
+			if (conf->calc_debug & CALCDBG_RUNSTATE)
+				printf("DEBUG: run_state from %s to %s\n",
+				    run_state_name(run_state),
+				    run_state_name(RUN_RCFILES));
 			run_state = RUN_RCFILES;
 			runrcfiles();
 		}
+		if (conf->calc_debug & CALCDBG_RUNSTATE)
+			printf("DEBUG: run_state from %s to %s\n",
+			    run_state_name(run_state),
+			    run_state_name(RUN_PRE_CMD_ARGS));
 		run_state = RUN_PRE_CMD_ARGS;
 	}
 
@@ -252,25 +284,46 @@ main(int argc, char **argv)
 			if (inputlevel() == 0) {
 				closeinput();
 				runrcfiles();
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_PRE_CMD_ARGS));
 				run_state = RUN_PRE_CMD_ARGS;
 			} else {
 				closeinput();
 			}
 		} else {
-			if ((havecommands && !i_flag) || !stdin_tty)
+			if ((havecommands && !i_flag) || !stdin_tty) {
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_EXIT_WITH_ERROR));
 				run_state = RUN_EXIT_WITH_ERROR;
-			else
+			} else {
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_PRE_CMD_ARGS));
 				run_state = RUN_PRE_CMD_ARGS;
+			}
 		}
 	}
 
 	if (run_state == RUN_PRE_CMD_ARGS) {
 		if (havecommands) {
+			if (conf->calc_debug & CALCDBG_RUNSTATE)
+				printf("DEBUG: run_state from %s to %s\n",
+				    run_state_name(run_state),
+				    run_state_name(RUN_CMD_ARGS));
 			run_state = RUN_CMD_ARGS;
 			(void) openstring(cmdbuf, (long) strlen(cmdbuf));
 			getcommands(FALSE);
 			closeinput();
 		}
+		if (conf->calc_debug & CALCDBG_RUNSTATE)
+			printf("DEBUG: run_state from %s to %s\n",
+			    run_state_name(run_state),
+			    run_state_name(RUN_PRE_TOP_LEVEL));
 		run_state = RUN_PRE_TOP_LEVEL;
 	}
 
@@ -279,19 +332,36 @@ main(int argc, char **argv)
 		if ((c_flag && !stoponerror) || stoponerror < 0) {
 			getcommands(FALSE);
 			if (inputlevel() == 0)
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_PRE_TOP_LEVEL));
 				run_state = RUN_PRE_TOP_LEVEL;
 			closeinput();
 		} else {
 			closeinput();
-			if (!stdin_tty || !i_flag || p_flag)
+			if (!stdin_tty || !i_flag || p_flag) {
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_EXIT_WITH_ERROR));
 				run_state = RUN_EXIT_WITH_ERROR;
-			else
+			} else {
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_PRE_TOP_LEVEL));
 				run_state = RUN_PRE_TOP_LEVEL;
+			}
 		}
 	}
 
 	if (run_state == RUN_PRE_TOP_LEVEL) {
 		if (stdin_tty && ((havecommands && !i_flag) || p_flag)) {
+			if (conf->calc_debug & CALCDBG_RUNSTATE)
+				printf("DEBUG: run_state from %s to %s\n",
+				    run_state_name(run_state),
+				    run_state_name(RUN_EXIT));
 			run_state = RUN_EXIT;
 		} else {
 			if (stdin_tty) {
@@ -300,6 +370,10 @@ main(int argc, char **argv)
 				resetinput();
 				openterminal();
 			}
+			if (conf->calc_debug & CALCDBG_RUNSTATE)
+				printf("DEBUG: run_state from %s to %s\n",
+				    run_state_name(run_state),
+				    run_state_name(RUN_TOP_LEVEL));
 			run_state = RUN_TOP_LEVEL;
 			getcommands(TRUE);
 		}
@@ -315,6 +389,10 @@ main(int argc, char **argv)
 				reinitialize();
 				getcommands(TRUE);
 			} else {
+				if (conf->calc_debug & CALCDBG_RUNSTATE)
+				    printf("DEBUG: run_state from %s to %s\n",
+					run_state_name(run_state),
+					run_state_name(RUN_EXIT_WITH_ERROR));
 			 	run_state = RUN_EXIT_WITH_ERROR;
 			}
 		}
diff --git a/calc.h b/calc.h
index 69a6795..266dc8f 100644
--- a/calc.h
+++ b/calc.h
@@ -208,6 +208,7 @@ typedef enum {
     RUN_EXIT_WITH_ERROR = 7	/* exit with error */
 } run;
 extern run run_state;
+extern char *run_state_name(run state);
 
 /*
  * calc version information
diff --git a/calc.man b/calc.man
index 0fe3673..561888e 100644
--- a/calc.man
+++ b/calc.man
@@ -15,17 +15,19 @@ calc \- arbitrary precision calculator
 .RB [ \-c ]
 .RB [ \-C ]
 .RB [ \-d ]
+.RB [ -D\ \&calc_debug[:lib_debug:[user_debug]] ]
+.br
+.in +5n
 .RB [ \-e ]
 .RB [ \-h ]
 .RB [ \-i ]
 .RB [ \-m\ \&mode ]
-.br
-.in +5n
 .RB [ \-n ]
 .RB [ \-p ]
 .RB [ \-q ]
 .RB [ \-u ]
 .RB [ \-v ]
+.br
 .RB [ calc_cmd\ \&.\|.\|. ]
 .in -5n
 .SH DESCRIPTION
@@ -122,6 +124,34 @@ It's nearly ten past six.
 This flag disables the reporting of missing calc
 startup scripts ($CALCRC).
 
+.TP
+.BR -D " calc_debug[:lib_debug:[user_debug]]"
+Force the initial value of config("calc_debug"),
+config("lib_debug") and config("user_debug").
+.sp 1
+The : separated strings are interpreted as signed 32 bit values.
+After an optional leading sign a leading zero indicates octal
+conversion, and a leading ``0x'' or ``0X'' hexadecimal
+conversion.  Otherwise, decimal conversion is assumed.
+.sp 1
+By default,
+.I calc_debug
+is 0,
+.I lib_debug
+is 3 and
+.I lib_debug
+is 0.
+.sp 1
+For more information use the following
+.B calc
+command:
+.sp 1
+.in +5n
+.nf
+help config
+.fi
+.in -5n
+
 .TP
 .B \-e
 Ignore any environment variables on startup.
@@ -182,7 +212,8 @@ This flag sets the permission mode of
 It controls the ability for
 .B calc
 to open files and execute programs.
-Mode may be a number from 0 to 7.
+.I Mode 
+may be a number from 0 to 7.
 .sp 1
 The mode value is interpreted in a way similar to that
 of the
@@ -205,8 +236,8 @@ octal mode:
 If one wished to run
 .B calc
 from a privileged user, one might want to use
-.B \-m
-0 in an effort to make
+.BR \-m " 0"
+in an effort to make
 .B calc
 somewhat more secure.
 .sp 1
@@ -214,8 +245,8 @@ Mode bits for reading and writing apply only on an
 open.
 Files already open are not effected.
 Thus if one wanted to use the
-.B \-m
-0 in an effort to make
+.BR \-m " 0"
+in an effort to make
 .B calc
 somewhat more secure, but still wanted to read and write a specific
 file, one might want to do in
diff --git a/config.c b/config.c
index ce2178c..77a0751 100644
--- a/config.c
+++ b/config.c
@@ -94,8 +94,8 @@ CONFIG oldstd = {	/* backward compatible standard configuration */
 	FALSE,			/* skip duplicate block output lines */
 	BLK_BASE_HEX,		/* block octet print base */
 	BLK_FMT_HD_STYLE,	/* block output format */
-	3,			/* calc library debug level */
 	0,			/* internal calc debug level */
+	3,			/* calc library debug level */
 	0, 			/* user defined debug level */
 	TRUE			/* print Quit or abort executed messages */
 };
@@ -130,8 +130,8 @@ CONFIG newstd = {	/* new non-backward compatible configuration */
 	FALSE,			/* skip duplicate block output lines */
 	BLK_BASE_HEX,		/* block octet print base */
 	BLK_FMT_HD_STYLE,	/* block output format */
-	3,			/* calc library debug level */
 	0,			/* internal calc debug level */
+	3,			/* calc library debug level */
 	0, 			/* user defined debug level */
 	TRUE			/* print Quit or abort executed messages */
 };
@@ -809,20 +809,6 @@ setconfig(int type, VALUE *vp)
 		conf->blkfmt = temp;
 		break;
 
-	case CONFIG_LIB_DEBUG:
-		if (vp->v_type != V_NUM) {
-			math_error("Non numeric for lib_debug");
-			/*NOTREACHED*/
-		}
-		q = vp->v_num;
-		temp = qtoi(q);
-		if (qisfrac(q) || !zistiny(q->num)) {
-			math_error("Illegal lib_debug parameter value");
-			/*NOTREACHED*/
-		}
-		conf->lib_debug = temp;
-		break;
-
 	case CONFIG_CALC_DEBUG:
 		if (vp->v_type != V_NUM) {
 			math_error("Non numeric for calc_debug");
@@ -837,6 +823,20 @@ setconfig(int type, VALUE *vp)
 		conf->calc_debug = temp;
 		break;
 
+	case CONFIG_LIB_DEBUG:
+		if (vp->v_type != V_NUM) {
+			math_error("Non numeric for lib_debug");
+			/*NOTREACHED*/
+		}
+		q = vp->v_num;
+		temp = qtoi(q);
+		if (qisfrac(q) || !zistiny(q->num)) {
+			math_error("Illegal lib_debug parameter value");
+			/*NOTREACHED*/
+		}
+		conf->lib_debug = temp;
+		break;
+
 	case CONFIG_USER_DEBUG:
 		if (vp->v_type != V_NUM) {
 			math_error("Non numeric for user_debug");
@@ -1125,14 +1125,14 @@ config_value(CONFIG *cfg, int type, VALUE *vp)
 		i = cfg->blkfmt;
 		break;
 
-	case CONFIG_LIB_DEBUG:
-		i = cfg->lib_debug;
-		break;
-
 	case CONFIG_CALC_DEBUG:
 		i = cfg->calc_debug;
 		break;
 
+	case CONFIG_LIB_DEBUG:
+		i = cfg->lib_debug;
+		break;
+
 	case CONFIG_USER_DEBUG:
 		i = cfg->user_debug;
 		break;
@@ -1214,8 +1214,8 @@ config_cmp(CONFIG *cfg1, CONFIG *cfg2)
 	       cfg1->blkverbose != cfg2->blkverbose ||
 	       cfg1->blkbase != cfg2->blkbase ||
 	       cfg1->blkfmt != cfg2->blkfmt ||
-	       cfg1->lib_debug != cfg2->lib_debug ||
 	       cfg1->calc_debug != cfg2->calc_debug ||
+	       cfg1->lib_debug != cfg2->lib_debug ||
 	       cfg1->user_debug != cfg2->user_debug ||
 	       cfg1->verbose_quit != cfg2->verbose_quit;
 }
diff --git a/config.h b/config.h
index 73442d0..6ff14fa 100644
--- a/config.h
+++ b/config.h
@@ -135,9 +135,9 @@ struct config {
 	BOOL blkverbose;	/* TRUE => print all lines if a block */
 	int blkbase;		/* block output base */
 	int blkfmt;		/* block output style */
-	int lib_debug;		/* library debug, see LIB_DEBUG_XXX below */
-	int calc_debug;		/* internal debug, see CALC_DEBUG_XXX below */
-	int user_debug;		/* user defined debug value: 0 default */
+	long calc_debug;	/* internal debug, see CALC_DEBUG_XXX below */
+	long lib_debug;		/* library debug, see LIB_DEBUG_XXX below */
+	long user_debug;	/* user defined debug value: 0 default */
 	BOOL verbose_quit;	/* TRUE => print Quit or abort executed msg */
 };
 typedef	struct config CONFIG;
@@ -158,7 +158,9 @@ typedef	struct config CONFIG;
 #define CALCDBG_FUNC_QUIT   (0x00000002)    /* active functions when quit */
 #define CALCDBG_HASH_STATE  (0x00000004)    /* hash state details */
 #define CALCDBG_BLOCK	    (0x00000008)    /* block debug */
-#define CALCDBG_MASK	    (0x0000000f)
+#define CALCDBG_TTY	    (0x00000010)    /* report TTY state changes */
+#define CALCDBG_RUNSTATE    (0x00000020)    /* report run_state changes */
+#define CALCDBG_MASK	    (0x0000003f)
 
 
 /*
@@ -167,6 +169,9 @@ typedef	struct config CONFIG;
 extern CONFIG *conf;		/* current configuration */
 extern CONFIG oldstd;		/* backward compatible standard configuration */
 extern CONFIG newstd;		/* new non-backward compatible configuration */
+extern char *calc_debug;	/* !=NULL => value of config("calc_debug") */
+extern char *lib_debug;		/* !=NULL => value of config("lib_debug") */
+extern char *user_debug;	/* !=NULL => value of config("user_debug") */
 
 
 /*
diff --git a/help/config b/help/config
index eda40ae..f692876 100644
--- a/help/config
+++ b/help/config
@@ -40,8 +40,8 @@ Configuration parameters
 	    "blkverbose"	TRUE=>print all lines, FALSE=>skip duplicates
 	    "blkbase"		block output base
 	    "blkfmt"		block output format
-	    "lib_debug"		controls library script debug information
 	    "calc_debug"	controls internal calc debug information
+	    "lib_debug"		controls library script debug information
 	    "user_debug"	for user defined debug information
 	    "verbose_quit"	TRUE=>print message on empty quit or abort
 
@@ -317,29 +317,6 @@ Configuration parameters
 
     The default "blkfmt" is "hd".
 
-    The "lib_debug" parameter is intended for controlling the possible
-    display of special information relating to functions, objects, and
-    other structures created by instructions in calc scripts.
-    Zero value of config("lib_debug") means that no such information
-    is displayed.  For other values, the non-zero bits which currently
-    have meanings are as follows:
-
-	n		Meaning of bit n of config("lib_debug")
-
-	0	When a function is defined, redefined or undefined at
-		interactive level, a message saying what has been done
-		is displayed.
-
-	1	When a function is defined, redefined or undefined during
-		the reading of a file, a message saying what has been done
-		is displayed.
-
-    The value for config("lib_debug") in both oldstd and newstd is 3,
-    but if calc is invoked with the -d flag, its initial value is zero.
-    Thus, if calc is started without the -d flag, until config("lib_debug")
-    is changed, a message will be output when a function is defined
-    either interactively or during the reading of a file.
-
     The "calc_debug" is intended for controlling internal calc routines
     that test its operation, or collect or display information that
     might be useful for debug purposes.  Much of the output from these
@@ -364,7 +341,42 @@ Configuration parameters
 		block is not NULL, and that its "length" is not negative.
 		A failure will result in a runtime error.
 
-    Bits >= 4 are reserved for future use and should not be used at this time.
+	4	Report on changes to the state of stdin as well as changes
+		to internal variables that control the setting and restoring
+		of stdin.
+
+	5	Report on changes to the run state of calc.
+
+    Bits >= 6 are reserved for future use and should not be used at this time.
+
+    By default, "calc_debug" is 0.  The initial value may be overridden
+    by the -D command line option.
+
+    The "lib_debug" parameter is intended for controlling the possible
+    display of special information relating to functions, objects, and
+    other structures created by instructions in calc scripts.
+    Zero value of config("lib_debug") means that no such information
+    is displayed.  For other values, the non-zero bits which currently
+    have meanings are as follows:
+
+	n		Meaning of bit n of config("lib_debug")
+
+	0	When a function is defined, redefined or undefined at
+		interactive level, a message saying what has been done
+		is displayed.
+
+	1	When a function is defined, redefined or undefined during
+		the reading of a file, a message saying what has been done
+		is displayed.
+
+    The value for config("lib_debug") in both oldstd and newstd is 3,
+    but if calc is invoked with the -d flag, its initial value is zero.
+    Thus, if calc is started without the -d flag, until config("lib_debug")
+    is changed, a message will be output when a function is defined
+    either interactively or during the reading of a file.
+
+    By default, "lib_debug" is 3.  The -d flag changes this default to 0.
+    The initial value may be overridden by the -D command line option.
 
     The "user_debug" is provided for use by users.  Calc ignores this value
     other than to set it to 0 by default (for both "oldstd" and "newstd").
@@ -376,6 +388,9 @@ Configuration parameters
     slower operation or more memory usage, and a particular value (like
     -1 or 0) corresponding to "no tests".
 
+    By default, "user_debug" is 0.  The initial value may be overridden
+    by the -D command line option.
+
     The "verbose_quit" controls the print of the message:
 
 	Quit or abort executed
diff --git a/help/usage b/help/usage
index 9e1af58..e73117f 100644
--- a/help/usage
+++ b/help/usage
@@ -2,8 +2,8 @@ Calc command line
 
     Calc has the following command line:
 
-	calc [-c] [-C] [-d] [-e] [-h] [-i] [-m mode]
-	     [-n] [-p] [-q] [-u] [-v] [calc_cmd ...]
+	calc [-c] [-C] [-d] [-D calc_debug[:lib_debug:[user_debug]]]
+	     [-e] [-h] [-i] [-m mode] [-n] [-p] [-q] [-u] [-v] [calc_cmd ...]
 
 	-c  Continue reading command lines even after an execution
 	    error has caused the abandonment of a line.
@@ -55,6 +55,22 @@ Calc command line
 	    This flag disables the reporting of missing calc
 	    startup scripts ($CALCRC).
 
+	-D calc_debug[:lib_debug:[user_debug]]
+
+	    Force the initial value of config("calc_debug"),
+	    config("lib_debug") and config("user_debug").
+
+	    The : separated strings are interpreted as signed 32 bit values.
+	    After an optional leading sign a leading zero indicates octal
+	    conversion, and a leading ``0x'' or ``0X'' hexadecimal
+	    conversion.  Otherwise, decimal conversion is assumed.
+
+	    By default, calc_debug is 0, lib_debug is 3 and lib_debug is 0.
+
+	    For more information use the following calc command:
+
+		help config
+
 	-e  Ignore any environment variables on startup.  The
 	    getenv() builtin will still return values, however.
 
diff --git a/hist.c b/hist.c
index b23e9f7..ce09c53 100644
--- a/hist.c
+++ b/hist.c
@@ -283,11 +283,16 @@ hist_init(char *filename)
 {
 	TTYSTRUCT	newtty;
 
-	if (inited)
+	if (inited) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: inited already set in hist_init\n");
 		return HIST_INITED;
+	}
 
 	inited = 1;
 	canedit = 0;
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: Set inited, cleared canedit in hist_init\n");
 
 	/*
 	 * open the bindings file
@@ -309,20 +314,31 @@ hist_init(char *filename)
 	closeinput();
 
 #ifdef	USE_SGTTY
-	if (ioctl(STDIN, TIOCGETP, &oldtty) < 0)
+	if (ioctl(STDIN, TIOCGETP, &oldtty) < 0) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cannot TIOCGETP stdin in hist_init\n");
 		return HIST_NOTTY;
+	}
 
 	newtty = oldtty;
 	newtty.sg_flags &= ~ECHO;
 	newtty.sg_flags |= CBREAK;
 
-	if (ioctl(STDIN, TIOCSETP, &newtty) < 0)
+	if (ioctl(STDIN, TIOCSETP, &newtty) < 0) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cannot TIOCSETP stdin in hist_init\n");
 		return HIST_NOTTY;
+	}
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: stty -ECHO +CBREAK in hist_init\n");
 #endif
 
 #ifdef	USE_TERMIO
-	if (ioctl(STDIN, TCGETA, &oldtty) < 0)
+	if (ioctl(STDIN, TCGETA, &oldtty) < 0) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cannot TCGETA stdin in hist_init\n");
 		return HIST_NOTTY;
+	}
 
 	newtty = oldtty;
 	newtty.c_lflag &= ~(ECHO | ECHOE | ECHOK);
@@ -331,13 +347,22 @@ hist_init(char *filename)
 	newtty.c_cc[VMIN] = 1;
 	newtty.c_cc[VTIME] = 0;
 
-	if (ioctl(STDIN, TCSETAW, &newtty) < 0)
+	if (ioctl(STDIN, TCSETAW, &newtty) < 0) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cannot TCSETAW stdin in hist_init\n");
 		return HIST_NOTTY;
+	}
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: stty -ECHO -ECHOE -ECHOK -ICANON +ISTRIP "
+		       "VMIN=1 VTIME=0 in hist_init\n");
 #endif
 
 #ifdef	USE_TERMIOS
-	if (tcgetattr(STDIN, &oldtty) < 0)
+	if (tcgetattr(STDIN, &oldtty) < 0) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cannot tcgetattr stdin in hist_init\n");
 		return HIST_NOTTY;
+	}
 
 	newtty = oldtty;
 	newtty.c_lflag &= ~(ECHO | ECHOE | ECHOK);
@@ -346,11 +371,19 @@ hist_init(char *filename)
 	newtty.c_cc[VMIN] = 1;
 	newtty.c_cc[VTIME] = 0;
 
-	if (tcsetattr(STDIN, TCSANOW, &newtty) < 0)
+	if (tcsetattr(STDIN, TCSANOW, &newtty) < 0) {
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cannot tcsetattr stdin in hist_init\n");
 		return HIST_NOTTY;
+	}
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: stty -ECHO -ECHOE -ECHOK -ICANON +ISTRIP "
+		       "VMIN=1 VTIME=0 in hist_init\n");
 #endif
 
 	canedit = 1;
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: Set canedit in hist_init\n");
 
 	return HIST_SUCCESS;
 }
@@ -363,20 +396,36 @@ void
 hist_term(void)
 {
 	if (!inited || !canedit) {
+		if (conf->calc_debug & CALCDBG_TTY) {
+			if (!inited)
+				printf("DEBUG: inited already cleared "
+				       "in hist_term\n");
+			if (!canedit)
+				printf("DEBUG: canedit already cleared "
+				       "in hist_term\n");
+		}
 		inited = 0;
+		if (conf->calc_debug & CALCDBG_TTY)
+			printf("DEBUG: Cleared inited in hist_term\n");
 		return;
 	}
 
 #ifdef	USE_SGTTY
 	(void) ioctl(STDIN, TIOCSETP, &oldtty);
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: TIOCSETP restored stdin in hist_term\n");
 #endif
 
 #ifdef	USE_TERMIO
 	(void) ioctl(STDIN, TCSETAW, &oldtty);
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: TCSETAW restored stdin in hist_term\n");
 #endif
 
 #ifdef	USE_TERMIOS
 	(void) tcsetattr(STDIN, TCSANOW, &oldtty);
+	if (conf->calc_debug & CALCDBG_TTY)
+		printf("DEBUG: TCSANOW restored stdin in hist_term\n");
 #endif
 }
 
diff --git a/lib/regress.cal b/lib/regress.cal
index 90cc137..a71d44c 100644
--- a/lib/regress.cal
+++ b/lib/regress.cal
@@ -292,7 +292,7 @@ define test_arithmetic()
 	vrfy(8/4==2,		'404: 8 / 4 == 2');
 	vrfy(2^3==8,		'405: 2 ^ 3 == 8');
 	vrfy(9-4-2==3,		'406: 9-4-2 == 3');
-	vrfy(9-4+2==7,		'407: 9-4+2 == 6');
+	vrfy(9-4+2==7,		'407: 9-4+2 == 7');
 	vrfy(-5+2==-3,		'408: -5+2 == -3');
 	vrfy(2*3+1==7,		'409: 2*3+1 == 7');
 	vrfy(1+2*3==7,		'410: 1+2*3 == 7');
diff --git a/lib_calc.c b/lib_calc.c
index 9dc4c7c..c008250 100644
--- a/lib_calc.c
+++ b/lib_calc.c
@@ -63,9 +63,9 @@ int new_std = FALSE;	/* TRUE (-n) => use newstd configuration */
 int abortlevel;		/* current level of aborts */
 BOOL inputwait;		/* TRUE if in a terminal input wait */
 jmp_buf jmpbuf;		/* for errors */
-run run_state = RUN_UNKNOWN;	/* calc startup and run state */
 char *program = "calc";		/* our name */
 char cmdbuf[MAXCMD+1+1+1];	/* command line expression + "\n\0" + guard */
+run run_state = RUN_UNKNOWN;	/* calc startup and run state */
 
 
 /*
@@ -86,6 +86,7 @@ int d_flag = FALSE;	/* TRUE => disable heading, lib_debug == 0 */
 int c_flag = FALSE;	/* TRUE => continue on error if permitted */
 int i_flag = FALSE;	/* TRUE => go interactive if permitted */
 
+
 /*
  * global values
  */
@@ -106,6 +107,10 @@ int errmax = ERRMAX;		/* if >= 0,  maximum value for errcount */
 
 NUMBER *epsilon_default;	/* default allowed error for float calcs */
 
+char *calc_debug = NULL;	/* !=NULL => value of config("calc_debug") */
+char *lib_debug = NULL;		/* !=NULL => value of config("lib_debug") */
+char *user_debug = NULL;	/* !=NULL => value of config("user_debug") */
+
 
 /*
  * initialization functions
@@ -173,6 +178,19 @@ libcalc_call_me_first(void)
 		conf->tab_ok = 0;
 	}
 
+	/*
+	 * -D flags can change calc_debug, lib_debug of user_debug
+	 */
+	if (calc_debug) {
+		conf->calc_debug = strtol(calc_debug, NULL, 0);
+	}
+	if (lib_debug) {
+		conf->lib_debug = strtol(lib_debug, NULL, 0);
+	}
+	if (user_debug) {
+		conf->user_debug = strtol(user_debug, NULL, 0);
+	}
+
 	/*
 	 * initialize
 	 */
@@ -181,6 +199,11 @@ libcalc_call_me_first(void)
 	/*
 	 * ready to rock & roll ..
 	 */
+	if (conf->calc_debug & CALCDBG_RUNSTATE) {
+		printf("DEBUG: run_state from %s to %s\n",
+		    run_state_name(run_state),
+		    run_state_name(RUN_BEGIN));
+	}
 	run_state = RUN_BEGIN;
 	init_done = 1;
 	return;
@@ -371,3 +394,33 @@ libcalc_call_me_last(void)
 	init_done = 0;
 	return;
 }
+
+
+/*
+ * run_state_name - return a constant string given a run_state
+ */
+char *
+run_state_name(run state)
+{
+	switch (state) {
+	case RUN_UNKNOWN:
+		return "RUN_UNKNOWN";
+	case RUN_BEGIN:
+		return "RUN_BEGIN";
+	case RUN_RCFILES:
+		return "RUN_RCFILES";
+	case RUN_PRE_CMD_ARGS:
+		return "RUN_PRE_CMD_ARGS";
+	case RUN_CMD_ARGS:
+		return "RUN_CMD_ARGS";
+	case RUN_PRE_TOP_LEVEL:
+		return "RUN_PRE_TOP_LEVEL";
+	case RUN_TOP_LEVEL:
+		return "RUN_TOP_LEVEL";
+	case RUN_EXIT:
+		return "RUN_EXIT";
+	case RUN_EXIT_WITH_ERROR:
+		return "RUN_EXIT_WITH_ERROR";
+	}
+	return "RUN_invalid";
+}
diff --git a/quickhash.c b/quickhash.c
index b12e693..a113c8e 100644
--- a/quickhash.c
+++ b/quickhash.c
@@ -404,8 +404,8 @@ config_hash(CONFIG *cfg, QCKHASH val)
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->blkverbose);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->blkbase);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->blkfmt);
-	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->lib_debug);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->calc_debug);
+	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->lib_debug);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->user_debug);
 	value = (((value>>5) | (value<<27)) ^ (USB32)cfg->verbose_quit);
 
diff --git a/version.c b/version.c
index bcbe718..7790f17 100644
--- a/version.c
+++ b/version.c
@@ -12,7 +12,7 @@
 #define MAJOR_VER	2	/* major version */
 #define MINOR_VER	11	/* minor version */
 #define MAJOR_PATCH	0	/* patch level or 0 if no patch */
-#define MINOR_PATCH	"9.1.1"	/* test number or empty string if no patch */
+#define MINOR_PATCH	"9.2"	/* test number or empty string if no patch */
 
 /*
  * calc version constants