Modifying microcode

Rob Doyle radioengr at gmail.com
Mon Jun 4 01:38:47 CDT 2018


On 5/30/2018 7:34 AM, Camiel Vanderhoeven via cctalk wrote:
> The microcode for the MicroVAX 2 (for which the MICRO2 assembler was
> used) and the CVAX (which is the CPU in your 3800) is implemented as
> a mask ROM on the CPU chip itself. No way to change it, and no way
> you can use MICRO2 to assemble the microcode for the CVAX.

Years ago I was playing the the microcode of the DEC Minnow (PDP-10)
which was written in MICRO2 - but I don't think I ever found that assembler.

Do MICRO2 executables exists?

Rob.


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