Problem with DEC LSI11 / KD11-F

Mattis Lind mattislind at
Sun Nov 30 05:32:38 CST 2014

2014-11-30 9:29 GMT+01:00 Eric Smith <spacewar at>

> Those two together are a KEV11-CA  DIS (a subset of CIS).  I've been
> trying to obtain those do dump the contents, as they are fairly rare.

How did you do the dumping? The unconditional precharge, conditional
discharge structure seems quite elaborate. Or maybe it is just to do have a
OC driver enabled at phase 2?

Do you have dumps of the micro code? Or are there any publicly available
source listing for the micro code?

I've got an untested design for a microcontroller-based Microm
> emulator that would fit into a Microm socket, but I haven't built one
> because I haven't so far had any special microcode I wanted to run.

If dumping is easy (?), now how does this precharge thing work in you

> Eric

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