[Info-vax] OT: obscure PDP11 OSes (even more dinosaury)

[Simon Clubley]

On 2015-06-16, David Froble <davef at tsoft-inc.com> wrote:
> Bill Gunshannon wrote:
>> In article <mlouja$7aj$2 at dont-email.me>,
>> 	Simon Clubley <clubley at remove_me.eisner.decus.org-Earth.UFP> writes:
>>> The TKB overlay functionality (and it's associated documentation) is
>>> something I have _very_ gladly left in the past and have almost
>>> successfully purged from my memory. :-)
>>>
>> 
>> Having spent the least of my PDP-11 time on RSX I can't say how hard
>> it was to use TKB but I do overlays on Ultrix-11 and have never found
>> it particularly difficult.
>> 
>
> It's not that it is so difficult, the real issue to me is that it 
> dictates how you design and write code.  This then restricts your options.
>

Exactly and it was even more annoying when you had to further
restructure _existing_ code (along with all the regression testing
that required) because enhancements had now made an overlay too big.

I've forgotten most of the day to day overlay issues I encountered
but that was one of the big ones I remember.

Simon.

-- 
Simon Clubley, clubley at remove_me.eisner.decus.org-Earth.UFP
Microsoft: Bringing you 1980s technology to a 21st century world