diff --git a/src/fs.h b/src/fs.h
new file mode 100644
index 0000000..cf7f003
--- /dev/null
+++ b/src/fs.h
@@ -0,0 +1,39 @@
+#ifndef FS_H
+#define FS_H
+
+/** devopen
+ * @param name    Filename to be used as blockdevice
+ * @param reopen  Unused, set NULL
+ * @return        1 on success, 0 on failure !CAUTION
+ */
+int devopen(const char *name, int *reopen);
+
+/** devclose
+ */
+void devclose(void);
+
+/** devread
+ * @param sector       512 byte sector of the block device
+ * @param byte_offset  Offset in the block
+ * @param byte_len     Buffer length
+ * @param buf          Buffer
+ * @return             1 on sucess, 0 on failure !CAUTION
+ */
+int devread(unsigned long sector, unsigned long byte_offset,
+	unsigned long byte_len, void *buf);
+
+
+
+
+
+void dev_set_partition(unsigned long start, unsigned long size);
+void dev_get_partition(unsigned long *start, unsigned long *size);
+
+int file_open(const char *filename);
+int file_read(void *buf, unsigned long len);
+unsigned long file_seek(unsigned long offset);
+unsigned long file_size(void);
+void file_set_size(unsigned long size);
+void file_close(void);
+
+#endif /* FS_H */