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Nat Semi MM57109 Number Cruncher Unit (NCU) W/RPN (NOS)

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GT1



Joined: 24 Feb 2020
Posts: 5
Location: Western PA (USA)
PostPosted: Sun Dec 26, 2021 10:24 am    Post subject: Nat Semi MM57109 Number Cruncher Unit (NCU) W/RPN (NOS) Reply with quote
Number Crunching Unit was an early chip for computation including scientific notation. 70 functions and temp memory for five values.

Two available, make an offer.
US seller.

Datasheet available here.
http://www.projects.scorchingbay.nz/dokuwiki/_media/electronic/datasheet/national/an-186_mm57109_interface_to_microprocessor.pdf
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CPUShack



Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
PostPosted: Sun Dec 26, 2021 12:58 pm    Post subject: Reply with quote
Do you have a picture?
Came in a few styles of PDIP
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GT1



Joined: 24 Feb 2020
Posts: 5
Location: Western PA (USA)
PostPosted: Sun Dec 26, 2021 1:28 pm    Post subject: Reply with quote
CPUShack wrote:
Do you have a picture?
Came in a few styles of PDIP

Here you go...
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