[time-nuts] OT Prototype Boards

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That's overstretched... eastern chips worked quite well, similarly to 
western counterparts. Some faulty prototypes could have been distributed 
through the black market, but none would've been incorporated in an 
official product. Even the westerners had bugs...
CCCP, and PRL made intel clones, DDR Zilog, and DEC ones, and NRB 
Motorolas. CCCR also had AMD bit-slice, and DEC clones. RSR was on it's 
"independence" trip, and had built mainly Z80 family chips, but also 
intel support ones.
There were even original developments with no western equivalent.
It was kind of policy that each country specialized in a particular 
segment with minimal overlapping, so that SEV/RGW/CAER/etc. (eng. 
Comecon) countries had to exchange goods.
As for the metric pitch, it was probably more a politically justified 
decision to not use imperial(ist) units.
At least Czechoslovakian, Polish, Bulgarian, and Romanian chips were 
made with .1" pitch. The German, and Russian chips were the "metric" ones.


On 6/25/2013 6:22 PM, Bob Stewart wrote:
> Brent,
>
> I seem to remember a story about the early days of micro-computing, when Russia was cloning 8080 chips.  Their chips were of such poor quality that each chip had a unique list of executions that could not be used.  Anyway, the Russians had sized their chip in metric measurements (2.54mm) rather than inches (0.10"), so that black market imports of the real thing would not fit.
>
> Bob
>
>
>
> ----- Original Message -----
>> From: Brent Gordon<time-nuts at adobe-labs.com>
>> To: time-nuts at febo.com
>> Cc:
>> Sent: Tuesday, June 25, 2013 9:40 AM
>> Subject: Re: [time-nuts] OT Prototype Boards
>>
>> I once saw a board that was 2.5 mm, which would cause what you
>> describe.  As soon as I figured out what the problem was, in the trash
>> it went.
>>
>> Brent
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