PDP-11/45 RSTS/E boot problem

[Fritz Mueller]

> On Jan 4, 2019, at 6:51 AM, Paul Koning <paulkoning at comcast.net> wrote:
> 
> Plan B: set a breakpoint at "ERL" (040672 in your map) which is the entry point to the error logging code.  That's where the display register is incremented as part of logging an error.  On entry, R0 is the EMT code (a LOG$xx code, because these are EMTs in kernel mode).  Many of those codes are fixed and defined in KERNEL.MAC which is in the kit.  The ones that are configuration-dependent are in the RSTS.MAP listing, for example LOG$KB.  The log code would tell us which device or component is unhappy.

Okay:

  BE125652
  _040672;B
  _P
  0B:040672
  _$0;$7L
  $0 /000000 000400 001764 000000 000000 000000 001730 040672

  _$S/004340
  _777400;777412L
  177400 /004713 000000 000344 000000 014000 001260