Modifying microcode

Paul Koning paulkoning at
Wed May 30 11:48:35 CDT 2018

> On May 30, 2018, at 11:11 AM, Camiel Vanderhoeven via cctalk <cctalk at> wrote:
> Depending on your definition of small, the MicroVAX 1, and the VAX 8000 series (not that small). In both cases though, the ROM chips are a custom DEC design.

Didn't the 780 get its microcode loaded by the console LSI-11?  And the 730 used bit slice processors (AMD 2901) as I recall, so that had to have its microcode external.


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