Modifying microcode

[Robert Armstrong]

>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.

Bob