Info Needed on a couple wafers

[johnvosh]

I’ve had these two wafers for quite a few years. I was wondering if anyone could give me any info on them. I can try and take some closer phots if you need me to. Thank you

It wouldn’t let me add a photo so here is a link to the picture.. https://www.reddit.com/r/vintagecomputing/comments/bl4f0m/heres_a_couple_old_cpu_dies_ive_had_them_for_a/?utm_source=share&utm_medium=ios_app

[CPUShack]

Closer pics would help for sure
They look nice though

[Vlasta]

What size are they? And yes closer photos would help.

[Birdman.]

One seems to be https://commons.wikimedia.org/wiki/File:Performance_PIPER_die.JPG but other would be easier to identify with better pic.

[Vlasta]

[johnvosh]

Sorry for the delay, but finally got some pictures taken. I had bought them from eBay quite a few years ago, but couldn't tell you who I had bought them from.

https://imgur.com/gallery/DOnk6Wt

[Birdman.]

Yes, PIPER there indeed together with AMD 486 test wafer and some gate array that's likely impossible to identify without some markings. Aberco's pics show that those AMD 486 are smaller than normal production versions, so that could be test wafer for 350 nm or other later process.

[aberco]

I am looking to take high resolution shot of PIPER BTW
I have the same AMD 486 waver and I confirm.
The first one is probably a radiation hardened ASIC.

[Vlasta]

The first one is a UTMC ASIC wafer and yes rad hardened. I have several from the same eBay seller - it is "bionicle"

[Vlasta]