[Info-vax] OpenVMS.Org quick pool

Johnny Billquist bqt at softjar.se
Fri Aug 24 11:00:23 EDT 2012


On 2012-08-24 16:22, Bob Koehler wrote:
> In article <k15re5$d0k$5 at Iltempo.Update.UU.SE>, Johnny Billquist <bqt at softjar.se> writes:
>>
>> No point. You cannot address more than 64K with a PDP-11, so even if you
>> had 1 MB, you could not address it.
>
>     With memory resident overlays on a PDP-11, you can't address more
>     than 64K in one segment, but you can have more than 64K in one
>     task's RAM.

Right. But that also assumes that you can do memory remappings. Also, 
it's a bit unclear about data in overlays. For disk resident overlays, 
any data written is lost, but I would suspect that it should survive in 
a memory resident overlay, but it's considered bad practice to depend on 
that...

	Johnny




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