Modifying microcode

Eric Smith spacewar at
Wed May 30 11:54:28 CDT 2018

On Wed, May 30, 2018 at 10:48 AM, Paul Koning via cctalk <
cctalk at> wrote:

> Didn't the 780 get its microcode loaded by the console LSI-11?

Only the small microcode patch store was loaded. Most of the 11/780
microcode was in bipolar PROMs. The later 11/785 had all of the microcode
in RAM loaded by the LSI-11.

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