diff --git a/Binary/Apps/Makefile b/Binary/Apps/Makefile
index 3fc3e53d..ea259d94 100644
--- a/Binary/Apps/Makefile
+++ b/Binary/Apps/Makefile
@@ -1,5 +1,5 @@
 TOOLS = ../../Tools
-MOREDIFF := *.com *.COM Tunes/*
+MOREDIFF := $(shell $(TOOLS)/unix/casefn.sh *.com Tunes/*)
 
 include $(TOOLS)/Makefile.inc
 
diff --git a/Binary/Makefile b/Binary/Makefile
index 6c4ebecd..c856d1b8 100644
--- a/Binary/Makefile
+++ b/Binary/Makefile
@@ -1,5 +1,5 @@
-MOREDIFF := *.img *.rom *.com *.eeprom
 TOOLS = ../Tools
+MOREDIFF := $(shell $(TOOLS)/unix/casefn.sh *.img *.rom *.com *.eeprom)
 SUBDIRS = Apps
 
 include $(TOOLS)/Makefile.inc
diff --git a/Source/HBIOS/Build.sh b/Source/HBIOS/Build.sh
index ed7dadde..17fa3679 100755
--- a/Source/HBIOS/Build.sh
+++ b/Source/HBIOS/Build.sh
@@ -48,7 +48,7 @@ Apps=(assign fdu format mode osldr rtc survey syscopy sysgen talk timer xm intte
 timestamp=$(date +%Y-%m-%d)
 timestamp="2020-02-20"
 
-blankfile=Blank${romsize}.dat
+blankfile=Blank${romsize}KB.dat
 romdiskfile=RomDisk.tmp
 romfmt=wbw_rom${romsize}
 outdir=../../Binary
diff --git a/Source/HBIOS/Makefile b/Source/HBIOS/Makefile
index f5a36a41..6bdff696 100644
--- a/Source/HBIOS/Makefile
+++ b/Source/HBIOS/Makefile
@@ -1,4 +1,4 @@
-OBJECTS = ZETA2_std.rom N8_std.rom SBC_std.rom
+OBJECTS = ZETA2_std.rom # N8_std.rom SBC_std.rom
 MOREDIFF = camel80.bin game.bin hbios_rom.bin nascom.bin prefix.bin usrrom.bin \
 	dbgmon.bin hbios_app.bin imgpad0.bin osimg1.bin romldr.bin \
 	eastaegg.bin hbios_img.bin imgpad.bin osimg.bin tastybasic.bin \
diff --git a/Tools/Makefile.inc b/Tools/Makefile.inc
index 5d5062fc..db6b2b1b 100644
--- a/Tools/Makefile.inc
+++ b/Tools/Makefile.inc
@@ -148,19 +148,21 @@ ifneq ($(DIFFTO),)
 	@for i in $(OBJECTS) $(MOREDIFF) ; do \
         sf=$$($(CASEFN) $$i) ; \
 		df=$$($(CASEFN) $(DIFFPATH)/$$i) ; \
-        if [ -f $$df -a -f $$sf ] ; then \
+        if [ -f "$$df" -a -f "$$sf" ] ; then \
 			if [ "$(VERBOSEDIFF)" ] ; then \
 				echo compare $$sf and $$df ; \
 			fi ; \
 			if ! cmp -s $$sf $$df ; then \
 				echo " " $$sf and $$df differ ; \
 				if [ "$(VERBOSEDIFF)" = "2" ] ; then \
-					cmp -bl $$sf $$df ; \
 					hexdump -Cv $$sf > $$sf.dump ; \
 					hexdump -Cv $$df > $$(basename $$df).dump.diff ; \
 				fi \
 			fi \
-		fi \
+		else \
+			if [ ! -f "$$sf" ] ; then echo $$i missing ; fi ; \
+			if [ ! -f "$$df" ] ; then echo $(DIFFPATH)/$$i missing ; fi ; \
+		fi ; \
     done
 endif