+#else /*CHARSET_EBCDIC*/
+ if((ch >= os_toascii['a']) && (ch <= os_toascii['z'])) return 1;
+ if((ch >= os_toascii['A']) && (ch <= os_toascii['Z'])) return 1;
+ if((ch >= os_toascii['0']) && (ch <= os_toascii['9'])) return 1;
+ if ((ch == os_toascii[' ']) || strchr("'()+,-./:=?", os_toebcdic[ch])) return 1;
+#endif /*CHARSET_EBCDIC*/