crippleware

crippleware n.  1. Software that has some important
   functionality deliberately removed, so as to entice potential users
   to pay for a working version.  2. [Cambridge] Variety of
   {guiltware} that exhorts you to donate to some charity (compare
   {careware}, {nagware}).  3. Hardware deliberately crippled,
   which can be upgraded to a more expensive model by a trivial change
   (e.g., cutting a jumper).

   An excellent example of crippleware (sense 3) is Intel's 486SX
   chip, which is a standard 486DX chip with the co-processor dyked
   out (in some early versions it was present but disabled).  To
   upgrade, you buy a complete 486DX chip with *working*
   co-processor (its identity thinly veiled by a different pinout) and
   plug it into the board's expansion socket.  It then disables the
   SX, which becomes a fancy power sink.  Don't you love Intel?