PDP-11/45 RSTS/E boot problem

Jon Elson elson at pico-systems.com
Wed Feb 6 20:32:30 CST 2019

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!


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