On Wed, 9 Dec 2020 20:35:49 -0000, Lennie Dymoke-Bradshaw wrote:
>Doh.....
>32bits + 12bits = 44bits
>
That feels like AR mode which IIRC was 31bits + 13bits = 44bits.
Somewhere I heard 1 bit / 2.5 years.
https://en.wikipedia.org/wiki/Moore%27s_law
>-----Original Message-----
>From: Lennie Dymoke-Bradshaw
>Sent: 09 December 2020 20:31
>
>Under MVS/ESA we had expanded storage. Expanded storage allowed each page to
>be addressed using a 32 bit address. As each page held 4096 (2**12) bytes the
>effective addressing was 32bits + 12bits = 48bits.
>
>Is this what you were thinking of?
-- gil
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