Bubble memory markings

From: Dwight Elvey <elvey_at_hal.com>
Date: Fri Jun 4 13:43:23 1999

Doug Spence <ds_spenc_at_alcor.concordia.ca> wrote:
> Hi,
>
> Does anyone know what all the numbers on the backs of Intel Magnetics
> bubble memory modules mean?
>
> One of the three modules that I have has a penciled-in line separating
> every 4th digit, so it looks like maybe some kind of address, but I
> think the modules each store 128KB and 16 bits wouldn't be enough.
> Besides that, I can't think of any use for address listings on the
> modules.
>
> e.g.:
>
> 09FHJ 8333 (<-- probably a date code)
> FFF7BAFBFFFBFEBF
> 7BB3FFFBFEFBFBFE
> FBFF7BF3DDBFDFBF
> BFFFFFFDFDFFFFFF
> DFFDFFFFFFBFFDFF

Hi
 These indicate good and bad loops. It is just mapping like on
older hard disk. I don't recall how many bits per loop.
Dwight
Received on Fri Jun 04 1999 - 13:43:23 BST