[TUHS] Upgrading from 11/40 to 11/45 in Unix v6

[Paul Winalski]

On 12/31/18, ron at ronnatalie.com <ron at ronnatalie.com> wrote:
> Yeah, ISVTX only worked on 410 and 411 files.   It locked the text segment
> in swap.   It kind of got obsoleted by later versions that could load stuff
> direct to memory from the disk image.
>
a.out magic number 0410 is OMAGIC (separate read-only instruction and
data segments).  0413 is ZMAGIC (demand-paged executable).  What is
magic number 0411?  That one I've never heard of before.

-Paul W.