Re: The history of the MONITOR tops-10)

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#625017

From: Johnny Billquist
Date: Sun, 15 Jul 2018 19:12

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On 2018-07-15 14:58, John Levine wrote:
> In article <pif63v$4av$2...@Iltempo.Update.UU.SE>,
>> You are most probably absolutely right. But I talked about Tops-20, not
>> TOPS-10. :-)
> 
> How many ways can there be to say that this block of memory corresponds to
> that file, and use the pager to move it back and forth?

Not sure. But I know many systems don't even have the concept. And on 
some systems transfers to/from files are done through system calls with 
DMA running directly to user buffers without going through the whole VM 
system, which might be argued is even more efficient.
So, even the idea to use the VM subsystem for file access is not 
something that is that universal.

And then you have the question of details of implementation and API. I 
bet there might be some creative solutions out there, if you start 
searching.

   Johnny

-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: b...@softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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From: Johnny Billquist <b...@softjar.se>
Newsgroups: alt.sys.pdp10,alt.folklore.computers
Subject: Re: The history of the MONITOR tops-10)
Date: Sun, 15 Jul 2018 21:12:36 +0200
Organization: Update Computer Club
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