The answer is yes as far as dumping the code from the old chips to the new ones
.
  You should be able to plug in an OTP and go with it.   If it were me, just
to be sure, I'd get at least one
JW part and try that first.  If everything went well, I'd finish programming
with the OTP's.  One other point to ponder..you didn't say how many of these
parts you had to program, but the PICSTART+ is designated a development programm
er
and not certified for production programming.  This shouldn't be a problem,
but something you may want to consider if you have very many to program.  I'm
not demeaning the PICSTART+, just repeating what Microchip states.

Happy Programming

                                        Regards,

                                          Jim





>Uh, could someone put my mind at
>ease please?
>
>I have a PICSTARTPLUS Development
>Kit and it works fine with 16F84s
>
>Now I suddenly need to dust off a
>couple of old designs which used
>the 16C54 & 16C57 and fabricate the
>units they controlled..
>
>The instruction manual says the
>PICSTART+ can handle the 16c54 &
>16c57 ? I'll have to order in some
>more of these chips - the 54 & 57.
>Should I now get the windowed "JW"
>version or the plain-ordinary
>plastic DIP version?
>
>I mean, there's no "GOTCHA" with
>the windowed "JW" type and
>plastic-DIP versions is there?  If
>I spend  a bundle for new 54's &
>57's, the programmes I wrote
>previously to run the windowed
>chips will run on the plain ones?
>
>And I can dump the old programmes,
>unmodified,  into the plain chips
>using the PICSTART+ instead of the
>now defunct PICSTART-16B?
>
>Sorry about the dumb question but
>I've been bitten too many times to
>take anything much for granted.
>
>Many thanx  for any advice - PJH
>