Modifying microcode

Robert Armstrong bob at jfcl.com
Fri Jun 1 12:08:05 CDT 2018


>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






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