[TUHS] pdp11 UNIX memory allocation.

Ronald Natalie ron at ronnatalie.com
Wed Jan 7 12:00:02 AEST 2015


Yep, the only time this was ever trully useful was so you could put an a.out directly into the boot block I think.
During normal operations the a.out header was never actually loaded into the user memory.

> On Jan 6, 2015, at 8:46 PM, Dave Horsfall <dave at horsfall.org> wrote:
> 
> On Tue, 6 Jan 2015, Ronald Natalie wrote:
> 
>> In non protected mode (407 magic) everything was fair game.
> 
> Which reminds me, I wonder how many people know that "407" was the 40's 
> instruction that, if the a.out header was present, would neatly skip over 
> it...




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