HP Forum Archive 09

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Off-Topic: Photo Message #1 Posted by Mike on 16 Dec 2002, 11:42 a.m. I was taking some photos of vintage chips this weekend and this one came out especially nice. I thought I'd just post it to show what is possible with today's newer digital cameras. This was a handheld photo and could have been sharper, had I used a tripod. It was taken with a Nikon 4500 at about 1" away from the chip. The chip die is 1/8" square. I'll post it as a link, for anyone that want's to take a look.

Re: Off-Topic: Photo Message #2 Posted by Vieira, Luiz C. (Brazil) on 16 Dec 2002, 1:01 p.m., in response to message #1 by Mike Hi; you should also mention what can be done today with new microtech... and what could wizards do at that time. Amazing. What is this chip for? By looking at the simetry and geometrical linearity, and considering the fact it's visible and the ID # (1702), I'd guess it's an EPROM (decoding address at left side, cells at right side). Good guess? Good photo. Congrats.

Intel EPROM Message #3 Posted by Mike on 16 Dec 2002, 1:11 p.m., in response to message #2 by Vieira, Luiz C. (Brazil) It is an Intel B1702A EPROM. The external case is unmarked except for the B1702A. The 1702 (256x8 EPROM) and the 1602 (PROM) used the same die. The date code puts it in April 1975.

Re: Off-Topic: Photo Message #4 Posted by Y K Wong (Singapore) on 16 Dec 2002, 7:50 p.m., in response to message #1 by Mike Hi Mike, Just a comment, apparently you have taken the chip indoor under tungsten light (artificial light) without correcting it, hence, giving the golden monochrome finishing. Depending on the purpose of taking this picture, you might want to correct it to show the actual color.... Should the actual chip look like this http://service.globalarray.net/user/ykwong/1702aa.jpg ? I have reduced the image quality from 225KB to 92KB to save on band wave. Regards, Y K Wong.

Yes, but Message #5 Posted by Mike on 16 Dec 2002, 10:37 p.m., in response to message #4 by Y K Wong (Singapore) I did take it under tungsten lighting but when you look at the actual die, it looks like gold wires with an overall gold tint. Not quite as gold as in my photo but nothing like what is in the retouched photo. My only purpose was to see the intel logo.

Re: Off-Topic: Photo Message #6 Posted by Vassilis Prevelakis on 16 Dec 2002, 7:55 p.m., in response to message #1 by Mike Is that a picture from the 71B EPROMs you had on eBay? **vp

Nope! it's an Intel B1702A EPROM Message #7 Posted by Mike on 16 Dec 2002, 10:34 p.m., in response to message #6 by Vassilis Prevelakis I got with some s-100 equipment 256x8.

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