Identify some IBM 8MB SIMMs marked "UYAN"?

[Alan Douglas]

Hi,
At the recent MIT flea market one vendor had a bag of six IBM SIMMs
for $4 so I decided "what the heck." Now that I look at them, I see
no FRU, and most of the chips are piggybacked. The labels read:

IBM 091 UYAN
11E2480BA-70
8MB 2M x 36 P

The board is also marked UYAN, NO94, 1542

Each SIMM has four square chips:
Toshiba
IBM
73G6876
TC160G11AT
1018 9437EAI Japan.

And 24 DIP chips piggybacked in pairs:
50G6229 PQ
IBM 9314
N41001V7

I recognize date codes 9437 and 9314 but what did I buy?

Thanks, Alan

[Tim Clarke]

> Hi,
> At the recent MIT flea market one vendor had a bag of six IBM SIMMs
> for $4 so I decided "what the heck." Now that I look at them, I see
> no FRU, and most of the chips are piggybacked. The labels read:
>
> IBM 091 UYAN
> 11E2480BA-70
> 8MB 2M x 36 P

Sounds like 8MB 70ns Parity SIMMs to me.

--
Regards,
Tim Clarke (Guildford, UK)

[Chris Bajumpaa]

Did you manage to pick up one of the many microchannel based RS/6000's that
were there?

--

Chris Bajumpaa

"Alan Douglas" <adou...@gis.net> wrote in message
news:3bd5dcd8...@news.newsguy.com...

[Alan Douglas]

Hi,
Chris asked:

>Did you manage to pick up one of the many microchannel based RS/6000's that
>were there?

Ignorance is bliss: I wouldn't know an RS/6000 if it bit me. I'm
trying to keep the MAD syndrome under control, with one working
example of a 60, 80, and 9595 (and a few desktop 70s and such). Hmmm,
I'll have to look up this RS/6000 so I can be prepared in case someone
wants to give one away. I'll bet the ones at MIT cost money.

I'd still like to know what these 8MB sticks are, if they fit
something unique (maybe they're just ordinary SIMMs).

Cheers, Alan

[Pete Rickard]

HI Alan,

> Each SIMM has four square chips:
> Toshiba
> IBM
> 73G6876
> TC160G11AT
> 1018 9437EAI Japan.
>

Those Toshiba chips are the type usually found on EOS type RAM, used for
many of the PC Server range.
HTH!

Pete.

[Peterwendt]

Hi !

>Those Toshiba chips are the type usually found on EOS type RAM, used for
>many of the PC Server range.

... particularly for the MCA-flavour of the Server 320/520.

I have those in 16MB types with exactly the same Toshiba 73G6876 "ECC On SIMM"
controller chip. This chip does the ECC work on the SIMM - while the board is
basically a "parity board" with some few extra detection logic and BIOS
modification to differ between a Parity and EOS module (and handle the errors
reported differently).

They are somewhat rare - and *might* work as standard Parity, but I don't think
they will.

The IBM FRU for the 8MB EOS is 11H0619 according to the EPRM and these are used
on Server 520 8641-Mxx (MCA) and -Exx (EISA) models, while the 16 and 32MB
modules are differed into unique numbers for the MCA and EISA units. They are
not listed for the 320 (8640), but since both machines use the same board(s)
the modules will work there as well - most likely the EOS 8MB had not been
offered for cost reasons on the 320 (which was a smaller, cheaper version
intended for lower requirements than the 520).

Very friendly greetings from Peter in Germany
http://members.aol.com/mcapage0/mcaindex.htm

[David R. Griffiths]

This raises the issue of why computer manufacturers don't label their
parts in plain english?

David

[Alan Douglas]

Hi,
Thank you, Pete and Peter.

>The IBM FRU for the 8MB EOS is 11H0619 according to the EPRM and these are used
>on Server 520 8641-Mxx (MCA) and -Exx (EISA) models, while the 16 and 32MB
>modules are differed into unique numbers for the MCA and EISA units. They are
>not listed for the 320 (8640), but since both machines use the same board(s)
>the modules will work there as well

That probably solves the mystery, except why they are not labelled
with an FRU number.

So now I need an MCA Server 320 to go with them. "Need" is the
operative word. Or can someone else use them?

I wonder how much these cost when they were new, not all that long
ago. Egad, I just bought 128 megs of PC133 for my Pentium 166, for
$20, and the seller had dropped his price to $18 by the end of the
flea market. I assume he was making a profit on them, even so.

Cheers, Alan

[Jim Shorney]

Alan Douglas wrote:
>
> So now I need an MCA Server 320 to go with them. "Need" is the
> operative word. Or can someone else use them?

I've got a RAM-less 320, if you're fishing for a buyer... :-)

[Alan Douglas]

Hi,
Jim replied:

>> So now I need an MCA Server 320 to go with them. "Need" is the
>> operative word. Or can someone else use them?

>I've got a RAM-less 320, if you're fishing for a buyer... :-)

That would keep me from being more MAD than I already am.
Yes: $4 plus postage and they're yours.

Cheers, Alan