Bubble Memeory was Re: eBay Finds (was: Ebay Posts was...)

From: Joe <rigdonj_at_intellistar.net>
Date: Fri Jan 22 11:54:23 1999

At 11:50 PM 1/22/99 +1100, you wrote:
>> >Yes, but I wonder whose actual bubble memory part is inside the
>> cartridge.
>> >Do you have a broken one to sacrifice for the quest for arcane knowledge?
>
>
>Well I attempted a sacrifice, but no luck.
>There's a 1" square (approx) metal shield there around the chip.
>Peelable label on the top simply labeled E top right corner, 7 bottom left
>corner, A somewhere near lower right middle, and 018543 in the center at
>bottom. Lots of evenly spaced dots ... hang on I might as well copy the
>whole thing... monospace font ON...
>
>...............E
>................
>................
>................
>........
>................
>................
>.........A......
>7...............
>........
> 018543
>
>strange :)
>
>Under that label is handwritten... 10/25 -9 KL60 S18543
>The board itself is marked Hitachi.
>I can't get to the bubble memory chip because it has a metal shield
>spot-welded around it. Wrapped around 4 of the 6 sides, so to speak. I've
>tried removing this sort of thing before - nigh impossible without a chisel,
>and I'm not about to do that.
>Chip has 12 pins/side, for a total of 24, if that helps.
>A
>

   Sounds SIMILAR to my Intel one but different. Mine has 10 pins per left
and right sides. The metal shield on it starts at the top edge next to the
circuit board and wraps over the top of the MBM and down the bottom side.
It has a flange that sticks out at each corner. Each flange has a hole in
it and looks like it was intended for a screw to go in it.

  The top says"

 intel(r) (m)
      7114-4 S9512B
      03LUT 8552
FF7FFFFF5FFFFBFFFF7F
etc {too lazy to type it all out}
etc
etc
etc
etc
etc
AAAAAA00000000000000

   I think the matrix of As, Bs, 0s and Fs is some sort of mapping of the
bad magnetic domains.

  Joe
Received on Fri Jan 22 1999 - 11:54:23 GMT

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