Modifying microcode

[Eric Smith]

On Fri, Jun 1, 2018 at 11:08 AM, Robert Armstrong <bob at jfcl.com> wrote:

> >Eric Smith <spacewar at gmail.com> wrote:
>
> >The control stores of the 11/785, 8600, and 8650 were entirely WCS.
> >
> >All other VAXen had (relatively) large ROM control store and tiny WCS or
> >patch store.
>
>   You forgot the 11/730 and 725.  The KA730 used 2901 bit slicers and the
> control store was entirely in RAM.  After power on it was a paperweight
> until the 8085 CFE loaded the microcode.


Thanks for the correction! I've never used those models.