Decapping

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Joined: Aug 12 2015
Posts: 142

Out of curiosity, has anyone de-capped
any of Apple's custom chips and
taken a photo die?

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Offline
Joined: May 27 2009
Posts: 898
Re: Decapping

Not that I'm aware of, I periodically look around for stuff like that and hadn't seen any.

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tokabln's picture
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Joined: Dec 30 2015
Posts: 95
Re: Decapping

It's not an Apple Chip but Stynx has done this on an accelerator chip

http://www.applefritter.com/?q=content/nude-zipchip

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Torsten aka tokabln

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Joined: Aug 12 2015
Posts: 142
Re: Decapping

This site looks interesting.

http://members.iinet.net.au/~lantra9jp1_nbn/gurudumps/

I will have a look if there is any Apple II stuff.
He is done other 8-bit computers and Mac.

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Joined: Aug 24 2013
Posts: 43
Re: Decapping

Robert Baruch (@babaggeboole) has a //e MMU that he has been analyzing.

https://twitter.com/babbageboole/status/870110235750408192

Unfortunately, I have not seen that he has published his results.

Getting the ZipChip gate array/asic to someone like him, Ken Shirriff,
or perhaps someone from the visual6502.org project would be very useful.

Given that it seems to be a standard cell array, it should not be too
difficult to sort out with clean and focused images.

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Joined: Aug 12 2015
Posts: 142
Re: Decapping

I have found this website in which they
have decapped a few of Apple's custom chips.
One is for the graphics tablet and
the 2 others. 1 for IWM and the other
for the SWIM chip on the Apple ][ 3.5 controller card.

This site just doesn't decapp Apple chips but others
also, so have a look.

www.siliconpr0n.org/map/

Click on the Apple folder to access the above information.

Regards

CWJ_Wilko's picture
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Joined: Jun 3 2015
Posts: 253
Re: Decapping

This seems like it's an important project if there's ever going to be a hope of reproducing these chips in the future.

stynx's picture
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Joined: Apr 19 2012
Posts: 165
Re: Decapping

tokabln wrote:

It's not an Apple Chip but Stynx has done this on an accelerator chip

http://www.applefritter.com/?q=content/nude-zipchip

Did it again Smile

ZIPCHIP 8000 ASIC photographed by Robert Baruch
55000x56000 (>300mb)
13800x14000 (60mb)

ZIPCHIP 8000 (cache on the bottom, 32mhz quartz removed)

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Joined: Aug 12 2017
Posts: 1
Re: Decapping

Here are the images that I took for the //e 344-0010 MMU chip. The svgz file there is for Inkscape.

https://drive.google.com/open?id=0BzoHDcfUnncTMTVOMTZTTjFIRDQ

ggb
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Joined: Mar 13 2012
Posts: 24
Re: Decapping

Robert,
a big thank you for your time spent taking and providing these hires photo's.
How much time does it take you to setup and take these photos.

Regards
Geoff B

macnoyd's picture
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Joined: Oct 15 2012
Posts: 198
Re: Decapping

Robert, those are amazing images! Thanks for sharing!

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