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Groups > sci.electronics.design > #446227
| From | Don Y <blockedofcourse@foo.invalid> |
|---|---|
| Newsgroups | sci.electronics.design |
| Subject | Re: OT: in favour of gradualism |
| Date | 2017-02-04 21:26 -0700 |
| Organization | A noiseless patient Spider |
| Message-ID | <o769e2$93i$1@dont-email.me> (permalink) |
| References | (8 earlier) <o75ju9$jc7$1@dont-email.me> <o75ktq$mk7$1@dont-email.me> <o75lgn$oa3$2@dont-email.me> <o75nio$3fj$1@dont-email.me> <YZqdnbtibK_hEQvFnZ2dnUU7-LnNnZ2d@giganews.com> |
On 2/4/2017 7:22 PM, John Robertson wrote:
>> That and NVRAM chips with internal Li cells that have finally after 20+
>> years failed.
>
> We call those Suicide Memory devices. In arcade games when the sealed battery
> dies the game also dies and you need some specialized knowledge to revive it.
> Lookup Capcom Suicide Battery for examples...
Different sort of beast. I think Tom is just talking about things like
packaged BBSRAM devices -- a low power CMOS RAM with a battery and some
signal gating logic bolted on. There have been many produced over the years
and they tend to go out of favor -- except for the products that already have
them installed!
Sun was fond of them in their workstations. When they'd inevitably fail
("Sun" hasn't produced a workstation in ages!), you'd be left trying to
dig the power connections for the battery out of the encasing plastic and
piggy-backing a battery atop the device.
The components you are referencing are intended to contain "details" that
will leak out when/if the device is copied/reverse engineered thereby
confounding the reverse engineering effort (the "information" is a
key component in the design).
Similar approaches, over the years, included removing device markings
from components (but, a counterfeiter could inspect the die to determine
the identity of the component), potting subassemblies as a step beyond
simply removing markings (but, they can be de-encapsulated, Xrayed, etc.),
embedding metal fibers in the potted assembly (to confound Xray), "full
custom" components (e.g., the "DMA" device used in Williams games, the
customs used in Atari games, etc).
>> It's a strange new world.
>
> The suicide battery protected products from being copied - for about two weeks.
> However collectors down the time line are all cursing the companies.
Blame the counterfeiters -- and the operators who would patronize them
and their "conversion kits".
[flippers.com? I had a pin-table called Flipper -- first add-a-ball, ~1960.
Fun machine... 3 bells, all of the rubber was "live", etc.]
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OT: in favour of gradualism bill.sloman@ieee.org - 2017-02-03 03:39 -0800
Re: OT: in favour of gradualism Winfield Hill <hill@rowland.harvard.edu> - 2017-02-03 04:21 -0800
Re: OT: in favour of gradualism bill.sloman@ieee.org - 2017-02-03 04:57 -0800
Re: OT: in favour of gradualism Jon Elson <elson@pico-systems.com> - 2017-02-03 11:38 -0600
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 07:21 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 10:42 -0500
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 08:15 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 11:36 -0500
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 09:40 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 13:52 -0500
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 11:50 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 20:31 -0500
Re: OT: in favour of gradualism Jon Elson <elson@pico-systems.com> - 2017-02-04 18:04 -0600
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 20:33 -0500
Re: OT: in favour of gradualism jurb6006@gmail.com - 2017-02-03 05:00 -0800
Re: OT: in favour of gradualism bill.sloman@ieee.org - 2017-02-03 09:03 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-03 09:35 -0700
Re: OT: in favour of gradualism bill.sloman@ieee.org - 2017-02-03 09:10 -0800
Re: OT: in favour of gradualism tabbypurr@gmail.com - 2017-02-03 17:18 -0800
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 07:24 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 12:34 -0700
Re: OT: in favour of gradualism tabbypurr@gmail.com - 2017-02-04 12:04 -0800
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 12:07 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 14:15 -0700
Re: OT: in favour of gradualism John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-04 14:02 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 15:19 -0700
Re: OT: in favour of gradualism "tom" <tmiller11147@verizon.net> - 2017-02-04 17:36 -0500
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 15:46 -0700
Re: OT: in favour of gradualism Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-04 14:56 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 16:17 -0700
Re: OT: in favour of gradualism "tom" <tmiller11147@verizon.net> - 2017-02-04 18:22 -0500
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 16:55 -0700
Re: OT: in favour of gradualism John Robertson <spam@flippers.com> - 2017-02-04 18:22 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 21:26 -0700
Re: OT: in favour of gradualism "tom" <tmiller11147@verizon.net> - 2017-02-04 17:35 -0500
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 15:44 -0700
Re: OT: in favour of gradualism "dcaster@krl.org" <dcaster@krl.org> - 2017-02-04 17:42 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 20:56 -0500
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-05 08:14 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-05 11:56 -0700
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-06 14:35 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-06 16:43 -0700
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-06 17:12 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-06 18:59 -0700
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-07 07:40 -0800
Re: OT: in favour of gradualism tabbypurr@gmail.com - 2017-02-07 12:16 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-06 21:11 -0500
Re: OT: in favour of gradualism tabbypurr@gmail.com - 2017-02-05 12:43 -0800
Re: OT: in favour of gradualism krw@notreal.com - 2017-02-04 20:42 -0500
Re: OT: in favour of gradualism John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-04 10:05 -0800
Re: OT: in favour of gradualism Joerg <news@analogconsultants.com> - 2017-02-04 10:24 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 12:45 -0700
Re: OT: in favour of gradualism "dcaster@krl.org" <dcaster@krl.org> - 2017-02-04 17:54 -0800
Re: OT: in favour of gradualism Don Y <blockedofcourse@foo.invalid> - 2017-02-04 21:45 -0700
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