diff --git a/hdr/nls.h b/hdr/nls.h
index bc075cf..fda3336 100644
--- a/hdr/nls.h
+++ b/hdr/nls.h
@@ -435,7 +435,10 @@ struct nlsPackage {             /* the contents of one chain item of the
 
 struct nlsDBCS {                /* The internal structure is unknown to me */
   UWORD numEntries;
-  UWORD dbcsTbl[1];
+  UWORD dbcsTbl[4];             /* I don't know max size but it should need
+                                   at least 3 words (6 bytes)
+                                   ({0x81,0x9f,0xe0,0xfc,0,0} for CP932-Japan)
+                                   -- lpproj 2014/10/27 */
 };
 
 struct nlsCharTbl {
diff --git a/hdr/portab.h b/hdr/portab.h
index d4f979d..1a34d90 100644
--- a/hdr/portab.h
+++ b/hdr/portab.h
@@ -100,9 +100,14 @@ static unsigned short __inline getSS(void)
   asm mov ax, ss;
 }
 
+#elif defined(__WATCOMC__) && defined(BUILD_UTILS)
+  /* workaround for building some utils with OpenWatcom (owcc) */
+#define MC68K
 #elif defined(__WATCOMC__)      /* don't know a better way */
 
+#if defined(_M_I86)
 #define I86
+#endif
 #define __int__(intno) asm int intno;
 void disable(void);
 #pragma aux disable = "cli" modify exact [];
@@ -170,10 +175,12 @@ We might even deal with a pre-ANSI compiler. This will certainly not compile.
 typedef __SIZE_TYPE__  size_t;
 #else
 #define CONST
+#if !(defined(_SIZE_T) || defined(_SIZE_T_DEFINED) || defined(__SIZE_T_DEFINED))
 typedef unsigned       size_t;
 #endif
 #endif
-#ifdef I86
+#endif
+#if defined(I86) && !defined(MC68K)
 #define VOID           void
 #define FAR            far      /* segment architecture */
 #define NEAR           near     /*    "          "      */
diff --git a/kernel/config.c b/kernel/config.c
index b3e572d..f53797f 100644
--- a/kernel/config.c
+++ b/kernel/config.c
@@ -1542,7 +1542,7 @@ err:printf("%s has invalid format\n", filename);
     {
       if (hdr[i].length != 6)
         goto err;
-      if (hdr[i].id < 1 || hdr[i].id > 6 || hdr[i].id == 3)
+      if (hdr[i].id < 1 || hdr[i].id > 7 || hdr[i].id == 3)
         continue;
       if (lseek(fd, hdr[i].offset) == 0xffffffffL
        || read(fd, &subf_data, 10) != 10
diff --git a/kernel/inthndlr.c b/kernel/inthndlr.c
index 4a40f70..5fb88d0 100644
--- a/kernel/inthndlr.c
+++ b/kernel/inthndlr.c
@@ -1377,7 +1377,7 @@ dispatch:
           case 0:
             p = DosGetDBCS();
             lr.DS = FP_SEG(p);
-            lr.SI = FP_OFF(p);
+            lr.SI = FP_OFF(p) + 2;
             break;
           case 1: /* set Korean Hangul input method to DL 0/1 */
             lr.AL = 0xff;       /* flag error (AL would be 0 if okay) */
diff --git a/kernel/makefile b/kernel/makefile
index ded0245..029ca93 100644
--- a/kernel/makefile
+++ b/kernel/makefile
@@ -21,9 +21,9 @@ OBJS4=break.obj dosfns.obj fatdir.obj fatfs.obj fattab.obj fcbfns.obj \
 inthndlr.obj
 OBJS5=ioctl.obj memmgr.obj task.obj newstuff.obj nls.obj network.obj
 OBJS6=prf.obj misc.obj strings.obj syspack.obj lfnapi.obj iasmsupt.obj memdisk.obj
-OBJS7=main.obj config.obj initoem.obj inithma.obj dyninit.obj iprf.obj \
-initdisk.obj initclk.obj cpu.obj
-OBJS=$(OBJS1) $(OBJS2) $(OBJS3) $(OBJS4) $(OBJS5) $(OBJS6) $(OBJS7)
+OBJS7=main.obj config.obj initoem.obj inithma.obj dyninit.obj iprf.obj
+OBJS8=initdisk.obj initclk.obj cpu.obj
+OBJS=$(OBJS1) $(OBJS2) $(OBJS3) $(OBJS4) $(OBJS5) $(OBJS6) $(OBJS7) $(OBJS8)
 
 #               *Explicit Rules*
 
@@ -62,7 +62,8 @@ $(TARGET).lnk: turboc.cfg makefile ../mkfiles/generic.mak ../mkfiles/$(COMPILER)
 		$(ECHOTO) $(TARGET).lnk $(OBJS4)+
 		$(ECHOTO) $(TARGET).lnk $(OBJS5)+
 		$(ECHOTO) $(TARGET).lnk $(OBJS6)+
-		$(ECHOTO) $(TARGET).lnk $(OBJS7)
+		$(ECHOTO) $(TARGET).lnk $(OBJS7)+
+		$(ECHOTO) $(TARGET).lnk $(OBJS8)
 		$(ECHOTO) $(TARGET).lnk kernel.exe
 		$(ECHOTO) $(TARGET).lnk kernel.map
 		$(ECHOTO) $(TARGET).lnk $(LIBS)
diff --git a/makefile b/makefile
index 0facb97..8efd92b 100644
--- a/makefile
+++ b/makefile
@@ -1,10 +1,14 @@
 # What you WANT on DOS is: 
 # EDIT CONFIG.B, COPY CONFIG.B to CONFIG.BAT, RUN BUILD.BAT
 # On Linux, use config.mak, and "make all", "make clean", or "make clobber"
+# On Windows, use config.mak, and 
+# "mingw32-make all", "mingw32-make clean", or "mingw32-make clobber"
 
 default:
 	@echo On DOS, please type build, clean, or clobber.
 	@echo On Linux, please type make all, make clean, or make clobber.
+	@echo On Windows, please type mingw32-make all, mingw32-make clean, or
+	@echo mingw32-make clobber.
 
 build:
 	build
@@ -60,14 +64,27 @@ zip: zip_src zipfat16 zipfat32
 #Linux part
 #defaults: override using config.mak
 export
-COMPILER=owlinux
 
-XCPU=86
-XFAT=32
+ifeq ($(OS),Windows_NT)
+BUILDENV ?= windows
+else
+BUILDENV ?= linux
+endif
+
+ifeq ($(BUILDENV),windows)
+COMPILER=owwin
+TEST_F=type >nul 2>nul
+else
+COMPILER=owlinux
+TEST_F=test -f
 ifndef WATCOM
   WATCOM=$(HOME)/watcom
   PATH:=$(WATCOM)/binl:$(PATH)
 endif
+endif
+
+XCPU=86
+XFAT=32
 XUPX=upx --8086 --best
 XNASM=nasm
 MAKE=wmake -ms -h
@@ -81,7 +98,7 @@ endif
 
 all:
 	cd utils && $(MAKE) production
-	cd lib && ( test -f libm.lib || touch libm.lib )
+	cd lib && ( $(TEST_F) libm.lib || wtouch libm.lib )
 	cd drivers && $(MAKE) production
 	cd boot && $(MAKE) production
 	cd sys && $(MAKE) production
diff --git a/mkfiles/owwin.mak b/mkfiles/owwin.mak
new file mode 100644
index 0000000..9d0e9e5
--- /dev/null
+++ b/mkfiles/owwin.mak
@@ -0,0 +1,21 @@
+#
+# WATCOM.MAK - kernel compiler options for Open Watcom on Windows (cross-compile)
+#
+
+# Get definitions from watcom.mak, then override
+include "../mkfiles/watcom.mak"
+
+DIRSEP=\ 
+
+INCLUDEPATH=$(COMPILERPATH)$(DIRSEP)h
+#RM=del 2>nul
+#CP=copy
+#ECHOTO=echo>>
+#INITPATCH=@echo > nul
+CLDEF=1
+CLT=owcc -DDOSC_TIME_H -DBUILD_UTILS -I../hdr -o $@
+CLC=$(CLT)
+CFLAGST=-fo=.obj $(CFLAGST)
+ALLCFLAGS=-fo=.obj $(ALLCFLAGS) 
+NASMFLAGS=-Dowlinux $(NASMFLAGS)
+XLINK=$(XLINK) debug all op symfile format dos option map,statics,verbose F { $(OBJS) } L ..$(DIRSEP)lib$(DIRSEP)device.lib N kernel.exe $#
diff --git a/sys/makefile b/sys/makefile
index 9cf3812..3280564 100644
--- a/sys/makefile
+++ b/sys/makefile
@@ -1,5 +1,5 @@
 #
-# makefile for bin2c.com and sys.com
+# makefile for bin2c.exe and sys.com
 #
 # $Id: makefile 1482 2009-07-11 16:59:43Z perditionc $
 #
@@ -18,31 +18,31 @@ SYS_EXE_dependencies =  \
  talloc.obj
 
 #		*Explicit Rules*
-production:     bin2c.com ../bin/sys.com
+production:     bin2c.exe ../bin/sys.com
 
-bin2c.com:      bin2c.c
-		$(CLT) bin2c.c
+bin2c.exe:      bin2c.c
+		$(CLC) bin2c.c
 
 ../bin/sys.com: sys.com
 		$(CP) sys.com ..$(DIRSEP)bin
 
-fat12com.h:	../boot/fat12com.bin bin2c.com
-		.$(DIRSEP)bin2c.com ../boot/fat12com.bin fat12com.h fat12com
+fat12com.h:	../boot/fat12com.bin bin2c.exe
+		.$(DIRSEP)bin2c.exe ../boot/fat12com.bin fat12com.h fat12com
 
-fat16com.h:	../boot/fat16com.bin bin2c.com
-		.$(DIRSEP)bin2c.com ../boot/fat16com.bin fat16com.h fat16com
+fat16com.h:	../boot/fat16com.bin bin2c.exe
+		.$(DIRSEP)bin2c.exe ../boot/fat16com.bin fat16com.h fat16com
 
-fat32chs.h:	../boot/fat32chs.bin bin2c.com
-		.$(DIRSEP)bin2c.com ../boot/fat32chs.bin fat32chs.h fat32chs
+fat32chs.h:	../boot/fat32chs.bin bin2c.exe
+		.$(DIRSEP)bin2c.exe ../boot/fat32chs.bin fat32chs.h fat32chs
 
-fat32lba.h:	../boot/fat32lba.bin bin2c.com
-		.$(DIRSEP)bin2c.com ../boot/fat32lba.bin fat32lba.h fat32lba
+fat32lba.h:	../boot/fat32lba.bin bin2c.exe
+		.$(DIRSEP)bin2c.exe ../boot/fat32lba.bin fat32lba.h fat32lba
 
-oemfat12.h:	../boot/oemfat12.bin bin2c.com
-		.$(DIRSEP)bin2c.com ../boot/oemfat12.bin oemfat12.h oemfat12
+oemfat12.h:	../boot/oemfat12.bin bin2c.exe
+		.$(DIRSEP)bin2c.exe ../boot/oemfat12.bin oemfat12.h oemfat12
 
-oemfat16.h:	../boot/oemfat16.bin bin2c.com
-		.$(DIRSEP)bin2c.com ../boot/oemfat16.bin oemfat16.h oemfat16
+oemfat16.h:	../boot/oemfat16.bin bin2c.exe
+		.$(DIRSEP)bin2c.exe ../boot/oemfat16.bin oemfat16.h oemfat16
 
 prf.obj:	../kernel/prf.c
 		$(CC) $(CFLAGS) ..$(DIRSEP)kernel$(DIRSEP)prf.c
@@ -55,7 +55,7 @@ sys.com:        $(SYS_EXE_dependencies)
 		$(CL) $(CFLAGST) $(TINY) $(SYS_EXE_dependencies)
 
 clobber:	clean
-		-$(RM) bin2c.com sys.com fat*.h oemfat*.h
+		-$(RM) bin2c.exe sys.com fat*.h oemfat*.h
 
 clean:
 		-$(RM) *.obj *.bak *.crf *.xrf *.map *.lst *.las *.cod *.err status.me