From mboxrd@z Thu Jan  1 00:00:00 1970
From: ron@ronnatalie.com (Ronald Natalie)
Date: Tue, 6 Jan 2015 21:00:02 -0500
Subject: [TUHS] pdp11 UNIX memory allocation.
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Message-ID: <2509FDBD-67C4-4552-BB58-01281049DCB6@ronnatalie.com>

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...