diff --git a/README b/README
index 0ae96ed..7be8a1d 100644
--- a/README
+++ b/README
@@ -26,9 +26,13 @@
 	doc/doc		Operation guide for SJ3 and other documents(Japanese)
 
 * Tested machine
-	PC				Linux 6.6.87.2-microsoft-standard-WSL2 
+	PC				Debian GNU/Linux 13
 					Windows 11
 
+* Tested compilers
+	GCC/Clang			Debian GNU/Linux 13
+	Open Watcom 2.0			Windows 11
+
 * Differences
 	 - Multiple contexts can be created in SJ4. SJ3's behavior of using
 	   global variables can be brought back with -DSJ3_GLOBAL.
diff --git a/watcom.sh b/watcom.sh
deleted file mode 100755
index fe10c05..0000000
--- a/watcom.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/sh
-
-for i in lib/sj3core/*.c; do
-	if [ -f $i.obj ]; then
-		continue
-	fi
-	echo $i
-	owcc -Iinclude/sj3common -Iinclude/sj3core -bnt -c -o $i.obj $i || exit 1
-done
-
-find lib/sj3core -name "*.obj" | while read a; do
-	echo "+$a"
-done | xargs wlib -q -b -fo -n sj3core.lib
-
-executable() {
-	N=$1
-
-	for i in src/$N/*.c; do
-		if [ -f $i.obj ]; then
-			continue
-		fi
-		echo $i
-		owcc -DUTF8 -DENGLISH -Iinclude/sj3common -Iinclude/sj3core -bnt -c -o $i.obj $i || exit 1
-	done
-
-	owcc -bnt -o $N.exe src/$N/*.obj $2
-}
-
-executable sj3mkdic
-executable sj3test sj3core.lib
diff --git a/win32.sh b/win32.sh
new file mode 100755
index 0000000..2d91145
--- /dev/null
+++ b/win32.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+if [ "x$1" = "x" ]; then
+	echo "Usage: $0 [watcom|msvc]"
+	exit 1
+fi
+
+for i in lib/sj4core/*.c; do
+	if [ -f $i.obj ]; then
+		continue
+	fi
+	echo $i
+
+	if [ "$1" = "watcom" ]; then
+		cl /Iinclude/sj4common /Iinclude/sj4core /c /fo$i.obj $i || exit 1
+	else
+		owcc -Iinclude/sj4common -Iinclude/sj4core -bnt -c -o $i.obj $i || exit 1
+	fi
+done
+
+find lib/sj4core -name "*.obj" | while read a; do
+	echo "+$a"
+done | xargs wlib -q -b -fo -n sj4core.lib
+
+executable() {
+	N=$1
+
+	for i in src/$N/*.c; do
+		if [ -f $i.obj ]; then
+			continue
+		fi
+		echo $i
+		owcc -DUTF8 -DENGLISH -Iinclude/sj4common -Iinclude/sj4core -bnt -c -o $i.obj $i || exit 1
+	done
+
+	owcc -bnt -o $N.exe src/$N/*.obj $2
+}
+
+executable sj4mkdic
+executable sj4test sj4core.lib