Re: is Vax addressing sane today

On Wed, 11 Sep 2024 9:32:04 +0000, Anton Ertl wrote:

Lawrence D'Oliveiro <ldo@nz.invalid> writes:

On Tue, 10 Sep 2024 16:32:05 GMT, Anton Ertl wrote:
>

It seems that during the late 1990s, IBM was not particularly interested
in mainframe per-CPU performance.

>
Mainframes were never about CPU performance.

>
The S/360 Model 91 and the Model 195 certainly were about the maximum
CPU performance.  And I doubt that IBM would have spent all the effort
with ECL and a superscalar OoO implementation for some of the ES/9000
machines if CPU performance was considered unimportant at the time.

91 was Current-Mode-Logic CML. Don't know about 195.
CML had all of the speed and all of the electrical and all of the heat
problems ECK had.