INT 21 U - DR DOS 5.0-6.0 internal - SET EXTENDED FILE ATTRIBUTES AX = 4305h DS:DX -> ASCIZA NUL-terminated ASCII string. The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h. Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. filename ??? Return: CF clear if successful CF set on error AX = error code (see #01680 at AH=59h/BX=0000h) Desc: this function allows the extended attributes, and optionally the encrypted password, of a file to be set. Note: this function is only supported by DR DOS 5.0 and 6.0 and DRMDOS 5.1 SeeAlso: AX=4304h,AX=4311h