diff --git a/CMakeLists.txt b/CMakeLists.txt
deleted file mode 100644
index 4bb0d38..0000000
--- a/CMakeLists.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-cmake_minimum_required(VERSION 4.0)
-project(cnotes C)
-
-set(CMAKE_C_STANDARD 90)
-
-add_executable(dumpnotes dumpnotes.c)
-add_executable(addnote addnote.c platform.h)
-
diff --git a/dumpnotes b/dumpnotes
deleted file mode 100755
index 467d95b..0000000
Binary files a/dumpnotes and /dev/null differ
diff --git a/platform.h b/platform.h
index 70afbd2..f84c6fa 100644
--- a/platform.h
+++ b/platform.h
@@ -1,14 +1,28 @@
 #ifndef PLATFORM_H
 #define PLATFORM_H
 
-#ifdef _WIN32
+#if defined(__MSDOS__) || defined(__DOS__)
+    #include <dir.h>
     #define mkdir_portable(path) mkdir(path)
     #define PATH_SEPARATOR '\\'
+    #define HOME_ENV "CNOTES_HOME"  /* Or use current dir */
+    #define PATH_SEP_STR "\\"
+    #define MAX_ENTRIES_DEFAULT 100  /* DOS memory constraint */
+#elif defined(_WIN32)
+    #include <direct.h>
+    #define mkdir_portable(path) _mkdir(path)
+    #define PATH_SEPARATOR '\\'
     #define HOME_ENV "USERPROFILE"
+    #define PATH_SEP_STR "\\"
+    #define MAX_ENTRIES_DEFAULT 5000
 #else
+    #include <sys/stat.h>
+    #include <sys/types.h>
     #define mkdir_portable(path) mkdir(path, 0755)
     #define PATH_SEPARATOR '/'
     #define HOME_ENV "HOME"
+    #define PATH_SEP_STR "/"
+    #define MAX_ENTRIES_DEFAULT 5000
 #endif
 
 #endif