PDP-11/45 RSTS/E boot problem

Noel Chiappa jnc at mercury.lcs.mit.edu
Mon Feb 11 12:31:50 CST 2019

    > From: Jerry Weiss

    > Though not a disk controller, the DEC DR11-B/DA11-B would not cross 64K
    > boundaries.

Interesting! What's odd is that the DR11-B uses the Bus Interface card (M7219)
from the RC11 controller, and that _can_ cross moby boundaries, so clearly it
has the right overflow output; someone just decided not to implement it - the
DR11-B sets ERROR instead on an address overflow. Wierd.

Anyway, it will be interesting to see if RSTS operates correctly once this
problem is fixed...



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