[TUHS] Early non-Unix filesystems?

Dave Horsfall dave at horsfall.org
Sun Mar 27 10:48:38 AEST 2016

On Fri, 25 Mar 2016, Johnny Billquist wrote:

> > Some instructions inhibit the "check for interrupts at the end of this 
> > instruction" check.  I'm most familiar with the 8080 EI instruction, 
> > which enabled interrupts after the following instruction (so things 
> > like EI;HLT didn't have a window).  It seems the PDP-11 SPL behaves 
> > the same.
> I don't think it should on the PDP-11, and the documentation do not 
> mention any such thing.

It most certainly did, at least on the 11/70 that I used...  Do you have 
experience otherwise?

Dave Horsfall DTM (VK2KFU)  "Those who don't understand security will suffer."

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