H1818 &TRW

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susl45



Joined: 27 Dec 2007
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PostPosted: Fri Oct 17, 2008 8:26 am    Post subject: H1818 &TRW Reply with quote

Does anyone know what the following chips are?
They look nice but I can not find exact information.
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Elar



Joined: 16 Jul 2003
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Location: Tallinn, Estonia

PostPosted: Fri Oct 17, 2008 8:33 am    Post subject: Reply with quote

Topmost chip is HP house numbered 1818-2508
Seems to be used in HP 9825A desktop calculator:
http://www.classiccmp.org/pipermail/cctalk/1998-June/102695.html

TRW TDC1016 is 10-bit video DAC.
http://www.datasheetarchive.com/pdf-datasheets/DataBooks/Book506-405.html
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susl45



Joined: 27 Dec 2007
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PostPosted: Fri Oct 17, 2008 8:57 am    Post subject: Reply with quote

Elar wrote:
Topmost chip is HP house numbered 1818-2508

TRW TDC1016 is 10-bit video DAC.
http://www.datasheetarchive.com/pdf-datasheets/DataBooks/Book506-405.html



Hi, Elar, Thanks for your answer.
For the first one, it should be HP series, but where could I find exact information of it?
The only useful website that I can find some information of vintage HP chips is the following one

http://www.sphere.bc.ca/test/hpparts.html

But there is nothing about the Hp chip H1818 2508.
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Elar



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PostPosted: Fri Oct 17, 2008 9:01 am    Post subject: Reply with quote

susl45 wrote:
Elar wrote:
For the first one, it should be HP series, but where could I find exact information of it?
The only useful website that I can find some information of vintage HP


You basically can't, it's HP's proprietary design manufactured by HP itself.
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susl45



Joined: 27 Dec 2007
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PostPosted: Fri Oct 17, 2008 9:12 am    Post subject: Reply with quote

Elar wrote:


You basically can't, it's HP's proprietary design manufactured by HP itself.


For the chips manufactured by other companies. such as intel, amd, etc, we can easily find their detailed information, but for Hp, it is really hard to do that..
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Elar



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PostPosted: Fri Oct 17, 2008 2:56 pm    Post subject: Reply with quote

The 1818-2508 KDP (Keyboard Display Printer) chip used in HP9825 calculators.
Page 40 in this PDF:
http://www.bitsavers.org/pdf/hp/98xx/09825-90039_CEhbk_Oct82.pdf
Katakana version of this chip is 1818-2513

Here's a picture of KDP board from:
http://www.bohemiae.com/museum/calculators/hp9825a/9825a-p14.html
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susl45



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PostPosted: Fri Oct 17, 2008 8:21 pm    Post subject: Reply with quote

Great!!
Very detailed information!
How can you find these! Elar, thanks you very much:)

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Elar



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PostPosted: Sat Oct 18, 2008 7:05 am    Post subject: Reply with quote

Extracted more details of KDP chip out of the PDF's from http://www.hpmuseum.net/collection_document.php
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thomsonicus



Joined: 11 Dec 2007
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PostPosted: Sat Oct 18, 2008 7:31 am    Post subject: Reply with quote

you guys are a gold mine when it comes to detailed information. i'm impressed every time i read stuff like this.
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