10 Jul
2012
10 Jul
'12
10:02 a.m.
Curt @ Atari Museum wrote:
Take a photo, post it up on flicker or something and
send a link to the
group, makes it easier to indentify
No.
I'm already taken the pictures with my cam, but finding the chip is really
that easy.. one has just to look to the pcb. That's why i'm not uploaded
the pictures to my website. Interstingly it seems that there is nowhere a
picture from that PCB available on the WEB...
BTW: why you are answering at top?
I've found out in the meantime that the chip mut be an Am7991 or 7992 Chip,
that also fits functionally and the 20Mhz Xtal is connected to the correct
pins.
I've just googles for the next bigger chip in this location, there is an
SIEMENS SCOCO12, 21-21672-10 which seems to be the network controller,
maybe something comaptible to the AMD LANCE AM7990?
I've found a hit on a DELQA Engeneering manual and in this manual finally
the Part ...
Interestingly I found a Datasheet for the Am7991A/Am7992A which makes no
difference between the two chips. Why the heck are there two Part numbers?
I've found in my boxes an old Chipset resqued from an old PC adapter,
it contains a Am7992. I'll solder in a socket and will try...
Could please someone look at the PCB and find out which chip is soldered
in? They are at least pin comatible..
Regards,
Holm
Holm Tiffe wrote:
>Hi,
>
>a friend of mine sent me an DEC Server 300 which he saved from the
>dumpster. There is a triangle in the bottom that some sharp metall edge
>must have made. This hit broke a 300mil 24pin DIL chip in the inside that
>must be related to the BNC network. The Chip is located next to the 20MHz
>Crystalnext to the poushbutton Switch, it is broken in two halves and the
>ceramic top plate of the chip is missing. It seems that the pcb survivied,
>so here comes the question:
>What was this for an (Network-)chip? Can please someone help?
>
>Kind Regards,
>
>Holm
>
>
>
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