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Glory_Cloud
Joined: 24 Jul 2010
Posts: 2942
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 Posted: Mon Apr 02, 2012 2:25 pm Post subject: DEC VAX 6000 CPU board |
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My latest find. 
Nice CPU chip too! |
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isa-d
Joined: 16 Aug 2006
Posts: 2984
Location: Italy
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| Posted: Mon Apr 02, 2012 2:45 pm Post subject: |
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| N-Vax CPU |
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UMMR
Joined: 23 Aug 2007
Posts: 381
Location: Udine, ITALY
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| Posted: Tue Apr 03, 2012 2:25 am Post subject: |
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Hello,
it's a DEC T2054-AA CPU board, aka KA66A (VAX 6000/600 "Neptune" or 6600). The NVAX chip runs here at 72 MHz. The 2nd big chip is the NEXMI controller DEC 249B. It's a semi-custom design based upon a CMOS standard cell architecture, and it contains 250K transistors. This complex component handles the data flux between the CPU and the system bus. The upper right corner of the board is the "XMI corner", with bus interfaces and buffers.
Paolo |
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Glory_Cloud
Joined: 24 Jul 2010
Posts: 2942
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| Posted: Tue Apr 03, 2012 7:21 am Post subject: |
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You are always a wealth of information Paulo! 
Thanks! |
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silice
Joined: 03 Mar 2009
Posts: 2178
Location: France
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| Posted: Tue Apr 03, 2012 7:47 am Post subject: |
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nice board 
Pascal |
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