PDP-11/05 (was: PDP-11/05 microcode dump?)

Guy Sotomayor ggs at shiresoft.com
Tue Jun 15 16:41:19 CDT 2021

On 6/15/21 12:16 PM, Tom Uban via cctalk wrote:
> On 6/15/21 2:02 PM, Josh Dersch wrote:
>> Just to provide some real-world data, I used a pair of KM11's to debug my 11/05, see the picture here:
>> http://yahozna.dyndns.org/scratch/1105-debug.jpg <http://yahozna.dyndns.org/scratch/1105-debug.jpg>
>> They worked fine.  (These are clones, from Guy Sotomayor's kit.)  I can verify tonight whether I
>> have the earlier or later rev CPU set, if that helps.
>> - Josh
> Interesting! From your pic, you have the M7260 without the circular baud rate selector switch, but I
> cannot tell which M7261 board you have.
> Does the machine come up and run normally with the boards in and the switches all the disabled
> positions or do you have to do a special sequence to start?
> I will have to look at the schematics to see how the two slots connect to the processor on each of
> the board versions and maybe also take a look at Guy's KL11 schematic if it is on his site.

The schematic should be in the user's manual for the KM11.


TTFN - Guy

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