diff --git a/BUGS b/BUGS
index f0fdd98..257af8d 100644
--- a/BUGS
+++ b/BUGS
@@ -38,18 +38,12 @@ then it may be time to send in a bug report.  You can send bug reports to:
 When you send your report, please include the following information:
 
     * a description of the problem
-
     * the version of calc you are using (if you cannot get calc
       it to run, then send us the 4 #define lines from version.c)
-
     * if you modified calc from an official patch, send me the mods you made
-
     * the type of system you were using
-
     * the type of compiler you were using
-
     * any compiler warnings or errors that you saw
-
     * cd to the calc source directory, and type:
 
 	make debug > debug.out 2>&1		(sh, ksh, bash users)
@@ -112,12 +106,30 @@ Known bugs:
 
 =-=
 
-Other items of note:
+Problems with known work-a-rounds:
 
     * There is a bug in gcc-2.95 that causes calc, when compiled with -O2,
       to fail the regression test.  The work-a-round is to compile with -O
       or to use gcc-2.96 or later.
 
+    * Solaris cc somtimes barfs while compiling zrand.c.  In particular, calc
+      barfs on on the SVAL macro.  The work-a-round is to use the Solaric cc
+      Makefile set sets -DFORCE_STDC.  I.e,:
+
+	    CCWARN=
+	    CCOPT= ${DEBUG} ${NO_SHARED}
+	    CCMISC= -DFORCE_STDC
+	    #
+	    CFLAGS= ${CCWARN} ${CCOPT} ${CCMISC}
+	    ICFLAGS= ${CCWARN} ${CCMISC}
+	    #
+	    LCFLAGS=
+	    LDFLAGS= ${NO_SHARED} ${LD_NO_SHARED}
+	    ILDFLAGS=
+	    #
+	    LCC= cc
+	    CC= ${PURIFY} ${LCC}
+
     * There is a bug in some versions of the Dec/Compaq cc for the Alpha
       where the following:
 
@@ -156,4 +168,4 @@ Other items of note:
     * The sparcv9 support for 64 bit Solaris under gcc-2.96 is able
       to compile calc, but calc dumps core very early on in startup.
       It is said that sparcv9 support in gcc-2.96 is very unofficial.
-      There is no work-a-round for this compile problem.
+      There is no work-a-round for this compiler problem.
diff --git a/CHANGES b/CHANGES
index 19b0597..3d5d802 100644
--- a/CHANGES
+++ b/CHANGES
@@ -11,6 +11,14 @@ The following are the changes from calc version 2.11.0t10 to date:
     used in combination with the GNU-readline facility, will prevent
     it from saving empty lines.
 
+    Minor typos fixed in regress.cal
+
+    Added 8500 test serise and test8500.cal to perform more extensive
+    tests on // and % with various rounding modes.
+
+    The 'unused value ignored' messages now start with Line 999: instead
+    of just 999:.
+
 
 The following are the changes from calc version 2.11.0t8.9.1 to 2.11.0t9.4.5:
 
diff --git a/addop.c b/addop.c
index 2549d8d..974d382 100644
--- a/addop.c
+++ b/addop.c
@@ -462,7 +462,8 @@ addop(long op)
 				fp->f_opcodecount -= diff;
 				oldop = OP_NOP;
 				oldoldop = OP_NOP;
-				fprintf(stderr, "%ld: unused value ignored\n",
+				fprintf(stderr,
+					"Line %ld: unused value ignored\n",
 					linenumber());
 				return;
 			}
diff --git a/lib/Makefile b/lib/Makefile
index 7a589e0..3d94123 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -44,7 +44,8 @@ CALC_FILES= README bigprime.cal deg.cal ellip.cal lucas.cal lucas_chk.cal \
 	test2700.cal test3100.cal test3300.cal test3400.cal prompt.cal \
 	test3500.cal seedrandom.cal test4000.cal test4100.cal test4600.cal \
 	beer.cal hello.cal test5100.cal test5200.cal randombitrun.cal \
-	randomrun.cal xx_print.cal natnumset.cal qtime.cal test8400.cal
+	randomrun.cal xx_print.cal natnumset.cal qtime.cal test8400.cal \
+	test8500.cal
 
 # These files are found (but not built) in the distribution
 #
diff --git a/lib/regress.cal b/lib/regress.cal
index 8f06200..f5a9f1e 100644
--- a/lib/regress.cal
+++ b/lib/regress.cal
@@ -7389,8 +7389,8 @@ X5800 = obj xy5800 = {1,2};
 print				  '5864: X5800 = obj xy5800 = {1,2}';
 vrfy(X5800 == (obj xy5800 = {1,2}),
 				  '5865: X5800 == (obj xy5800 = {1,2})');
-define f5800(a8500 = mat[2] = {3,4}) = 5 * a8500;
-print		'5866: define f5800(a8500 = mat[2] = {3,4}) = 5 * a8500;'
+define f5800(a5800 = mat[2] = {3,4}) = 5 * a5800;
+print		'5866: define f5800(a5800 = mat[2] = {3,4}) = 5 * a5800;'
 vrfy(f5800() == (mat[] = {15,20}),'5867: f5800() == (mat[] = {15,20})');
 print '5868: End of 5800 sequence';
 
@@ -7493,6 +7493,15 @@ vrfy(test8400() == 64434,	'8405: test8400() == 64434');
 print	'8406: Ending test_quit';
 
 
+/*
+ * test_divmod - psuedo-random tests on the // and % with various rounding modes
+ */
+print;
+print '8500: Starting test_divmod'
+read -once "test8500";
+/* 85xx: Ending test_divmod is printed by test8500.cal */
+
+
 /*
  * read various calc libs
  *
diff --git a/lib/test8500.cal b/lib/test8500.cal
new file mode 100644
index 0000000..3e28ed9
--- /dev/null
+++ b/lib/test8500.cal
@@ -0,0 +1,242 @@
+/*
+ * Copyright (c) 1996 Ernest Bowen and Landon Curt Noll
+ * Permission is granted to use, distribute, or modify this source,
+ * provided that this copyright notice remains intact.
+ *
+ * By: Ernest Bowen and Landon Curt Noll
+ *     ernie@neumann.une.edu.au and http://reality.sgi.com/chongo/
+ *
+ * This library is used by the 8500 series of the regress.cal test suite.
+ */
+/*
+ * Tests of // and % operators
+ */
+
+global err_8500;	/* divmod_8500 error count */
+global L_8500;		/* list of problem values */
+global ver_8500;	/* test verbosity - see setting comment near bottom */
+global old_seed_8500;	/* old srand() seed */
+
+/*
+ * save the config state so that we can change it and restore later
+ */
+global cfg_8500 = config("all");
+
+
+/*
+ * onetest_8500 - perform one division / remainder test
+ *
+ * Returns:
+ *	0 = test was successful
+ *	>0 = test error indicator
+ */
+define onetest_8500(a,b,rnd) {
+	local q, r, s, S;
+
+	/*
+	 * set a random rounding mode
+	 */
+	config("quo", rnd), config("mod", rnd);
+
+	/*
+	 * perform the division and mod
+	 */
+	q = a // b;
+	r = a % b;
+
+	/*
+	 * verify the fundamental math
+	 */
+	if (a != q * b + r)
+		return 1;
+
+	/*
+	 * determine if the rounding worked
+	 */
+	if (b) {
+		if (rnd & 16)
+			s = sgn(abs(r) - abs(b)/2);
+		else
+			s = sgn(abs(r) - abs(b));
+
+		if (s < 0 || r == 0)
+			return 0;
+
+		if (s > 0)
+			return 2;
+
+		if (((rnd & 16) && s == 0) || !(rnd & 16)) {
+
+			S = sgn(r) * sgn(b);   /* This is sgn(a/b) - a//b */
+			switch (rnd & 15) {
+				case 0: return (S < 0) ? 3 : 0;
+				case 1: return (S > 0) ? 4 : 0;
+				case 2: return (S != sgn(a)*sgn(b)) ? 5 : 0;
+				case 3: return (S != -sgn(a)*sgn(b)) ? 6 : 0;
+					break;
+				case 4: return (S != sgn(b)) ? 7 : 0;
+				case 5: return (S != -sgn(b)) ? 8 : 0;
+				case 6: return (S != sgn(a)) ? 9 : 0;
+				case 7: return (S != -sgn(a)) ? 10 : 0;
+				case 8: return (isodd(q)) ? 11 : 0;
+				case 9: return (iseven(q)) ? 12 : 0;
+				case 10: return (iseven(q) != (a/b > 0)) ? 13:0;
+				case 11: return (isodd(q) != (a/b > 0)) ? 14:0;
+				case 12: return (iseven(q) != (b > 0)) ? 15 : 0;
+				case 13: return (isodd(q) != (b > 0)) ? 16 : 0;
+				case 14: return (iseven(q) != (a > 0)) ? 17 : 0;
+				case 15: return (isodd(q) != (a > 0)) ? 18 : 0;
+			}
+		}
+	}
+
+	/*
+	 * all is well
+	 */
+	return 0;
+}
+
+
+/*
+ * divmod_8500 - perform a bunch of pseudo-random // and % test
+ *
+ * divmod_8500(N, M1, M2) will perform N tests with randomly chosen integers
+ * a, b with abs(a) < M1, abs(b) < M2, which with 50% probability are
+ * converted to a = (2 * a + 1) * b,  b = 2 * b (to give case where
+ * a / b is an integer + 1/2).
+ *
+ * N defaults to 10, M1 to 2^128, M2 to 2^64
+ *
+ * The testnum, if > 0, is used while printing a failure or success.
+ *
+ * The rounding parameter is randomly chosen.
+ *
+ * After a run of divmod_8500 the a, b, rnd values which gave failure are
+ * stored in the list L_8500.  L_8500[0], L_8500[1], L_8500[2] are a, b, rnd for the first
+ * test, etc.
+ */
+define divmod_8500(N = 10, M1 = 2^128, M2 = 2^64, testnum = 0)
+{
+	local a, b, i, v, rnd;
+	local errmsg;		/* error message to display */
+
+	/*
+	 * firewall
+	 */
+	if (!isint(M1) || M1 < 2)
+		quit "Bad second arg for dtest";
+
+	if (!isint(M2) || M2 < 2)
+		quit "Bad third arg for dtest";
+
+	/*
+	 * test setup
+	 */
+	err_8500 = 0;
+	L_8500 = list();
+
+	/*
+	 * perform the random results
+	 */
+	for (i = 0; i < N; i++) {
+
+		/*
+		 * randomly select two values in the range controlled by M1,M2
+		 */
+		a = rand(-M1+1, M1);
+		b = rand(-M2+1, M2);
+		if (rand(2)) {
+			a = (2 * a + 1) * b;
+			b *= 2;
+		}
+
+		/*
+		 * seelect one of the 32 rounding modes at random
+		 */
+		rnd = rand(32);
+
+		/*
+		 * ver_8500 pre-test reporting
+		 */
+		if (ver_8500 > 1)
+			printf("Test %d: a = %d, b = %d, rnd = %d\n",
+					 i, a, b, rnd);
+
+		/*
+		 * perform the actual test
+		 */
+		v = onetest_8500(a, b, rnd);
+
+		/*
+		 * individual test analysis
+		 */
+		if (v != 0) {
+			err_8500++;
+			if (ver_8500 != 0) {
+				if (testnum > 0) {
+					errmsg = strprintf(
+						"Failure %d on test %d", v, i);
+					prob(errmsg);
+				} else {
+					printf("Failure %d on test %d", v, i);
+				}
+			}
+			append(L_8500, a, b, rnd);
+		}
+	}
+
+	/*
+	 * report in the results
+	 */
+	if (err_8500) {
+		if (testnum > 0) {
+			errmsg = strprintf(
+			    "%d: divmod_8500(%d,,,%d): %d failures",
+			    testnum, N, testnum, err_8500);
+			prob(errmsg);
+		} else {
+			printf("%s failure%s", err_8500,
+			       (err_8500 > 1) ? "s" : "");
+		}
+	} else {
+		if (testnum > 0) {
+			errmsg = strprintf("%d: divmod_8500(%d,,,%d)",
+			    testnum, N, testnum);
+			vrfy(err_8500 == 0, errmsg);
+		} else {
+			print "No failure";
+		}
+	}
+}
+
+/*
+ * ver_8500 != 0 displays failures; ver_8500 > 1 displays all numbers tested
+ */
+ver_8500 = 0;
+print '8501: ver_8500 = 0';
+old_seed_8500 = srand(31^61);
+print '8502: old_seed_8500 = srand(31^61)';
+
+/*
+ * do the tests
+ */
+divmod_8500(250, 2^128, 2^1, 8503);
+divmod_8500(250, 2^128, 2^64, 8504);
+divmod_8500(250, 2^256, 2^64, 8505);
+divmod_8500(250, 2^1024, 2^64, 8506);
+divmod_8500(250, 2^1024, 2^128, 8507);
+divmod_8500(250, 2^16384, 2^1024, 8508);
+divmod_8500(1000, 2^128, 2^64, 8509);
+
+/*
+ * restore state
+ */
+config("all", cfg_8500),;
+print '8510: config("all", cfg_8500),';
+srand(old_seed_8500),;
+print '8511: srand(old_seed_8500),';
+
+/*
+ * finished with 8500 tests
+ */
+print '8512: Ending test_divmod';
diff --git a/version.c b/version.c
index 048d756..2c29ee7 100644
--- a/version.c
+++ b/version.c
@@ -18,7 +18,7 @@ static char *program;
 #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  "10.1.1"	/* test number or empty string if no patch */
+#define MINOR_PATCH  "10.1.2"	/* test number or empty string if no patch */
 
 /*
  * calc version constants