Re: IBM 360 Model 50 information?

[Paul Koning via cctalk]

> On Mar 29, 2019, at 11:18 AM, Jon Elson via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> ...
> Oh, one other issue is the 360's had no FFs.  All storage elements were 
> transparent latches, and they generally used a 4-phase clock. 

The same is true for the CDC 6600.  Not a big surprise; a transparent latch can 
be made of two cross-connected gates, while a flip-flop (edge triggered) 
requires more stuff (four gates?).  And the 6600 uses at least four clock 
phases; in parts of the CPU there are additional clocks so some of the hairy 
parts are more like 6 or so phases.

        paul