TIP: Click on subject to list as thread! ANSI
echo: apple
to: comp.sys.apple2
from: Steven Hirsch
date: 2009-02-15 09:40:12
subject: Re: Flakey ZipChip 8000

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.

If I break a pin off, it's at least feasible to grind away some of the potting 
material and solder a lead on.

The startup problem appears related to reset.  Turns out it's not pressure 
that makes it boot - it's capacitive coupling of my hand!  Wierd.
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