[Info-vax] Backup TK50 tapes

glen herrmannsfeldt gah at ugcs.caltech.edu
Tue Feb 26 18:55:28 EST 2013


Bob Koehler <koehler at eisner.nospam.encompasserve.org> wrote:
> In article <kgipko$6j8$1 at speranza.aioe.org>, glen herrmannsfeldt <gah at ugcs.caltech.edu> writes:
 
>> As well as I remember, 256K was common for the early VAX, so again
>> why would anyone want to use more than 32K for a tape buffer?
>> (64K if you double buffer.)  Neither IBM nor DEC planned well for
>> memory prices going down as fast as they did.
 
>   256K RAM?  The first VAX we had shipped with DEC's minumum 1/2 MB
>   RAM under VMS 1.5.

According to wikipedia, the 11/780 went from 128K to 8M, though
I am not so sure now where I was remembering 256K from.

I first used an 11/780 in 1979, and my thought was that it had 256K,
but it is long enough ago that I wouldn't be sure.
 
>   I don't recall seeing VAXen with less RAM, even 11/725 I think
>   started with about 1MB.

-- glen



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