Re: Flakey ZipChip 8000

[James Littlejohn <narguthru@yahoo.com>]

On Feb 15, 1:21 pm, Steven Hirsch <snhir...@gmail.com> wrote:
> James Littlejohn wrote:
> > On Feb 15, 8:53 am, Steven Hirsch <snhir...@gmail.com> wrote:
> >> Steven Hirsch wrote:
> >>> James Littlejohn wrote:
> >>>>> This thing may not even have one more round of insertion left before
> >>>>> pins
> >>>>> start breaking off, so I'm looking for advice on solving the
> >>>>> intermittant
> >>>>> problem and mounting it permanently in... something.  What have folks
> >>>>> done
> >>>>> with these things to get around contact problems?  Is there life
> >>>>> after broken
> >>>>> pins?
> >>>>> I can almost imagine a circuit board with a pair of 20-pin headers
> >>>>> and 40
> >>>>> holes offset a bit so I can solder the ZipChip on permanently.
> >>>> I had foreseen this on my Zip chips and on Accelerators for the GS. I
> >>>> desoldered the CPU socket and installed a ZIF socket on both my IIe
> >>>> and IIgs motherboards.
> >>> Excellent plan!  I'll order up a couple of 40-pin low-profile ZIF
> >>> sockets forthwith.
> >> Quick update and proviso:  A low-profile socket isn't going to work with a
> >> ZipChip!  The package extends too far on the ends and will interfere with the
> >> actuating lever :-(.  I'm going to have to go for the conventional ZIF socket
> >> with side-mounted lever.  That's going to neatly prevent anything from sitting
> >> in slot 3 and perhaps slot 2 as well.
>
> > I purchased mine from Reactive Micro, Henry alters them to work with
> > the larger chip package.
>
> Would you mind taking a photograph looking straight down on the CPU?  I'm
> curious how that was modified.

Here is a picture of the socket on my GS.

http://8bitsystem.com/AppleII/ZIF GS.JPG

Alteration was done with a Dremel. One of the hardware hackers
favorite tools.