PDP-11/45 RSTS/E boot problem

[Jon Elson]

On 02/06/2019 05:39 PM, Fritz Mueller via cctalk wrote:
>> On Feb 6, 2019, at 2:24 PM, Brent Hilpert via cctalk <cctalk at classiccmp.org> wrote:
>>
>> Is the schematic available for the memory board at-issue?
>> Curious myself to see what approach for refresh DEC used.
> Yes, here: http://bitsavers.trailing-edge.com/pdf/dec/pdp11/memory/MP00672_MS11L_engDrw.pdf
>
> There is also a technical manual adjacent, with circuit descriptions.
>
> I will scope this up tonight and take a look!
Yup, page 6, a 555 RC refresh timer!

Jon