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jojothe junkman

Post subject: Fancy pants ic chips

Posted: Wed Dec 10, 2025 8:30 pm

Joined: Thu Jan 27, 2022 10:27 pm
Posts: 19

What do I have here? Anything special with these ic chips?

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20251210_192718.jpg [ 3.7 MiB | Viewed 390 times ]

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marked141

Post subject: Re: Fancy pants ic chips

Posted: Wed Dec 10, 2025 10:08 pm

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1505
Location: I'm right here :D

Just ICs... They happen to be ceramic and have windows.

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jojothe junkman

Post subject: Re: Fancy pants ic chips

Posted: Wed Dec 10, 2025 10:41 pm

Joined: Thu Jan 27, 2022 10:27 pm
Posts: 19

Thank you

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Catwhisker

Post subject: Re: Fancy pants ic chips

Posted: Thu Dec 11, 2025 5:29 am

Joined: Mon Apr 15, 2024 9:38 pm
Posts: 146

It is an EPROM. Electrically Programmable Read Only Memory. The clear round window which you can see the actual semiconductor die chip is made of quartz. By shining an ultraviolet light through the window. The EPROM can be erased. Then reprogrammed with new data by a device made to reprogram EPROMs. One then had to cover the window with an opaque sticker or something. That way outside light couldn't erase the data accidently. It was great "fancy pants stuff " in its day. But. Yes. It goes IC Chips as scrap as mark141 pointed out. I'm curious if those chips came out of an old arcade game.
Here to learn like everybody else.

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