31 Dec '16, 3pm

8008 Exposed

[Ken Shirriff] is no stranger to Hackaday. His latest blog post is just the kind of thing we expect from him: a tear down of the venerable 8008 CPU . We suspect [Ken’s] earlier post on early CPUs pointed out the lack of a good 8008 die photo. Of course, he wasn’t satisfied to just snap the picture. He also does an analysis of the different constructs on the die. Ever wonder why the 8008 ALU is laid out in a triangle shape? In all fairness, you probably haven’t, but you might after you look at the photomicrograph of the die. [Ken] explains why. He also explains a bit about how PMOS works and the history of the design, including why it was in the odd 18-pin package. At the end, he talks about how he decapsulated the part and got the pictures, in case you ever want to try that yourself. As a personal aside, I used to do this at Motorola and I think [Ken] was wise to stick to ...

Full article: http://hackaday.com/2016/12/31/8008-exposed/

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