nude ZipChip

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stynx's picture
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Since im interested in accelerators and i have my free day today, i have finally decapitated a ZipChip for SCIENCE.

I tested it in this condition, but

... it's dead Jim!


-Jonas


Well it was not working properly previously Smile

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Re: nude ZipChip

Where did you get it?

Tongue

stynx's picture
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Re: nude ZipChip

It was yours Laughing out loud
I tested it beforehand and even though it booted 2 or 3 times, it stopped working after some time and did not boot anymore.
But it was bought for decapping anyways. Despite my worries, it was really easy to remove the Epoxy... felt more like rubber though.

BTW: i suspect that the chip in the middle is the same ASIC as in the //c+ ... it has 84 pins as well

Maybe i can find someone who can get a high res. picture from the chip in the middle.

-Jonas

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Re: nude ZipChip

I tried my best to clean the pins on it but the problem was not the pins.

Since some have said that the early run of zip chips had overheating problems, I suspect that this one might be one of those.

That zip chip was the first one that I bought recently that was bad.

Then I got another one which was bad also.

Not too long ago I got one which is NOS.

If this one won't work then I will NEVER get another one...

The one you have, I won't say who I got it from tho.

Anyway, I am glad you got it for the reason you stated.

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Re: nude ZipChip

Personally i think its not overheating but the ASIC/Gatearray that is buggy or dead. The ceramic base is perfectly usable for heat dissipation.

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Re: nude ZipChip

Thank You very much for the Photos...

I have an early Zip Chip, and it has the Overheating Issues too..

It runs for a while, like 5-10 minutes, and the Halts..

http://www.applefritter.com/?q=content/zip-chip-ii-4-apple

MarkO

ggb
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Re: nude ZipChip

Great job and thanks for the photo's

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Re: nude ZipChip

Really very nice! And good job.

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Re: nude ZipChip

ggb wrote:

Great job and thanks for the photo's

I will make photos with a closer look as soon as i get the digital microscope i ordered. Afterwards the chip will be given to a university as an object for the demonstration of 80s high density integrated circuitry. I wouldn't have though i would get a request like that this soon Wink

-Jonas

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Re: nude ZipChip

Please feel free to use the pictures in any way. I offer them for free without any claims. As soon as i have higher resolution close ups of the chips, i will post them here.
Maybe we can decode the Gatearray Wink

-Jonas

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Re: nude ZipChip

Nude zip chip.

You agree that if you click this forum post that you're 18 or older.

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Re: nude ZipChip


closeup of the ASIC

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Re: nude ZipChip

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Re: nude ZipChip

stynx,

That second shot would make a hell of a poster!

Steven Smile

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stynx's picture
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Re: nude ZipChip

W65C02 closeup Smile

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Re: nude ZipChip

gsmcten wrote:

That second shot would make a hell of a poster!

Feel free to do it Smile the resolution should be enough.
Sadly the chips are covered with a clear silicone coating that attracts dust like a magnet...

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Re: nude ZipChip

Really amazing pictures. You've mentioned that you have ordered a digital microscope. Has this been used for the above pictures and if what digital microscope have you ordered ? Seems to be a good option to help solder small SMD chip pins.

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Re: nude ZipChip

The microscope i ordered was one of the $150-$250 range TFT-microscopes from Amazon. The pictures are arranged from several shots (10 for the w65c02 and a lot more for the Asic).
The space below the lens is very limited but does allow for limited manipulation in the least magnification (10x => 50x in the highes res.). Furthermore the microscope does not have a optical zoom what is very limiting. I would not recommend any typical usb/tft microscope that has a 'classic' construction for any soldering... i have worked with binocular microscopes in the past and can fully recommend them if they have actual 3d-reproduction. But these tend to be more in the $1000+ range.

The video resolution of a typical tft/usb-microscope is 640x480 at 20-30 fps.
Higher video resolution microscopes cost $500+.

-Jonas

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Re: nude ZipChip

Jonas,

Take a trip to the Handy-Dandy Corner Forensics Shop.
They may make a bigger one for you. lol

Steven Smile

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Re: nude ZipChip

What happened to the ASIC photo?
MSG 12 is blank.

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Re: nude ZipChip

its still there. you can also go to my flicker account.

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Re: nude ZipChip
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Re: nude ZipChip

I love threads like these! Thanks for sharing the dissection pics.