diff --git a/Source/HBIOS/Makefile b/Source/HBIOS/Makefile
index c1e7a716..9587c33b 100644
--- a/Source/HBIOS/Makefile
+++ b/Source/HBIOS/Makefile
@@ -1,6 +1,6 @@
 OBJECTS =
 
-ifeq (1,1)
+ifeq (1,0)
 OBJECTS += DYNO_std.rom 
 OBJECTS += EZZ80_std.rom 
 OBJECTS += MK4_std.rom 
@@ -27,18 +27,18 @@ MOREDIFF = camel80.bin game.bin hbios_rom.bin nascom.bin prefix.bin usrrom.bin \
 	eastaegg.bin hbios_img.bin imgpad.bin osimg.bin tastybasic.bin \
 	game.bin usrrom.bin
 
-SUBDIRS = 
-DEST = ../../Binary
-TOOLS =../../Tools
-OTHERS =  *.img *.rom *.com *.bin *.z80 cpm.sys zsys.sys Build.inc RomDisk.tmp font*.asm
-include $(TOOLS)/Makefile.inc
+SUBDIRS = 
+DEST = ../../Binary
+TOOLS =../../Tools
+OTHERS =  *.img *.rom *.com *.bin *.z80 cpm.sys zsys.sys Build.inc RomDisk.tmp font*.asm
+include $(TOOLS)/Makefile.inc
 
 ifeq ($(DIFFMAKE),1)
 	DIFFBUILD := -d $(DIFFTO)/Source/HBIOS
 endif
 
 DIFFPATH = $(DIFFTO)/Binary
-
+
 
 ROMSIZE=512
 
@@ -47,8 +47,8 @@ N8_std.rom: ROMSIZE=512
 %.rom:
 	bash Build.sh $(DIFFBUILD) $(shell echo $* | tr '_' ' ') $(ROMSIZE)
 
-#ZETA2_std.rom:
-#	bash Build.sh ZETA2 std 512
+#ZETA2_std.rom:
+#	bash Build.sh ZETA2 std 512
 
 hbios_rom.bin:	hbios.asm build.inc
 	$(TASM) -dROMBOOT hbios.asm hbios_rom.bin hbios_rom.lst