PDP-11/05 microcode dump?

Mattis Lind mattislind at gmail.com
Fri May 6 13:18:14 CDT 2016

fredag 6 maj 2016 skrev Noel Chiappa <jnc at mercury.lcs.mit.edu>:

>     > From: William Degnan
>     >> I would need a dump of .. at least A04A2 / E102 on the Control
> board.
>     > Can you clarify?   Is this a typo?
> No, there are two different major versions of the M7261 Control board; see
>   http://gunkies.org/wiki/PDP-11/05#CPU_board_versions
> A04A2 is inded E102 on the later major version of the board; on the earlier
> version (prints for that version are in the GT40 prints online, pg. 162 and
> on) A04A2 is E92.
Thanks Noel for sorting this out. I started to get confused. The etch
revision is 'F' on my boards.

> Speaking of the two major versions, though, I wonder if the ucode in the
> two
> versions is identical? The uROM chip numbers should give it, (if they are
> the
> same on both versions, albeit in different locations on the board), but I
> have
> yet to check. Does anyone happen to know?
>         Noel

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