[Info-vax] Whither VMS?

Bob Eager rde42 at spamcop.net
Fri Sep 18 17:36:00 EDT 2009


On Fri, 18 Sep 2009 20:58:50 +0100, ChrisQ wrote:

>> RT-11 was the *second* PDP-11 system I used. Much faster than
>> DOS/BATCH, which was the first (but absolutely tiny, with over a
>> hundred overlays).
>> 
> Overlays - aargh. They were "fun". I remember using 2 or 3 overlays for
> a proprietary network diagnostic. A 16k or so data buffer, overlaid with
> code when the buffer was not in use.

DOS/BATCH used two different overlay areas, as I recall. The command 
interpreter one was 128 words, I think. The RUN command used four 
overlays.

The whole system was only 2Kwords resident, thiugh.



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