More nightmare (hard to identify) LSI chips, and a VLSI

[Neon]

Hi, can you help identify these? I did not find datasheets for any of them. LSI's site does not seem to have any information about these chips. I suspect they are not CPUs, as ASICs are LSI's primary business. Speculation and pondering welcome.

[Windmiller]

These are from a SGI board. I have a board with all of these chips except one of them on it and they are the exact same.

[hugo929]

All chips from LSI with "L1Axxxx" or "L1Bxxxx" marking are ASIC?

[smithy]

Does "BMA" and "SCIP" on the bottom 2 refer to function?

[Neon]

One would think so. The triangles suggest military specification, and so maybe military communications functions.

Maybe Berlekamp–Massey algorithm and Secure Communications Interoperability Protocol?

Perhaps these are NATO parts.

[Windmiller]

A majority of LSI chips have the triangle. I have always wondered why since many of there chips are obviously not mil-spec. I am sure someone knows

[debs3759]

Surely different manufacturers would not always use the triangle symbol for the same purpose? Does it always mean milspec? I understood not from something I was told in the past about a chip I thought to be milspec...

EDIT:

I see Brennan replied while I was still writing. Good to know I was not totally off the mark

[Neon]

well, I am probably wrong then.

See what happens when you start searching on acronyms? You start to think that you actually know something.

Do any of LSI's chips feature a heart symbol, or a clover leaf? Those would be really great!

[Windmiller]

[UMMR]

Hi,
you're right, acronyms on LSI chips manufactured for SGI refer to the circuit's function. I have a "BMA" mounted in a SGI R4400 CPU card. I guess it's a sort of bus interface/controller (it's mounted near the backplane bus connectors).
If You have a L1A9136 marked "CC REV C (c) 1993 SGI" I'm sure, it's a cache controller used in IP19 CPU cards.
"SCIP" is a chip used in SGI Challenge and Onyx systems (see: http://schrotthal.de/sgi/onyx/newio4+scip.html). SCIP means "SCSI Channel Interface Processor" (http://www.users.csbsju.edu/~jgramke/Newsletters/IOLhtml_Mar96.html).
Paolo

[Neon]

Paolo,
Thank you, that is very helpful information.

[Neon]

Here is one more LSI monster! This one came with a bag of components, and it is a multi chip module. When I took it out of the bag, I was excited to see this very large and beautiful MCM. It is about 58x58 mm, (2.25x2.25 in.)

It reads: SGI92 235-15, so I think it must be from another SGI device.

[Neon]

Then, I turned it over to see the pin side.

So sad.

[el_gecko]

One of my favourite chip too

[smithy]