On Tue, Jan 6, 2015 at 9:18 PM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:

> I'm not sure that anything actually used the fact that 407 was 'br .+020',
> by
> the V6 era; I think it was just left over from older Unixes (where it was
> not
> in fact stripped on loading). Not just on executables running under Unix;
> the
> boot-loader also stripped it, so it wasn't even necessary to strip the
> a.out
> header off /unix.
>

​If you look at the first edition code that Warren has, that seems to
support it.

Clem​
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