At 15:04 26/02/99 +1100, you wrote:
>Uh, could someone put my mind at
>ease please?
>
snip
>
>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?

Yes, they will but you have to be
careful to intialize your ram locations
fully as the light can influence
unintialized ram locations.

Apart from this I see no problems.

>
>And I can dump the old programmes,
>unmodified,  into the plain chips
>using the PICSTART+ instead of the
>now defunct PICSTART-16B?

Yes.

>
>Sorry about the dumb question but
>I've been bitten too many times to
>take anything much for granted.

That's not so dumb.

Jim


>Many thanx  for any advice - PJH
>
________________________________________
Jim Robertson
Email: newfound@pipeline.com.au
http://www.pipeline.com.au/users/newfound
MPLAB compatible PIC programmers and firmware
upgrades for many programmers.
________________________________________