PDP-11/45 RSTS/E boot problem

Tony Duell ard.p850ug1 at gmail.com
Mon Feb 11 12:07:32 CST 2019

On Mon, Feb 11, 2019 at 6:03 PM Noel Chiappa via cctalk
<cctalk at classiccmp.org> wrote:
>     > From: Jon Elson
>     > Likely some disk controllers did NOT SUPPORT crossing 64K boundaries!
> No; the RK11 spec says "[the two extended memory bits] make up a two-bit
> counter that increments each time the RKBA overflows".
> The actual error turns out to be slightly different to my guess; there's
> a spurious overflow from the low 16-bit register to these bits at 0170000.

Maybe a problem with E29 or E34 on the M795 module?


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