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Re: operating systems design

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On 01/30/2015 02:10 PM, Rich wrote:
> Robert Heller <heller@deepsoft.com> wrote:
>> At Fri, 30 Jan 2015 15:21:44 +0000 (UTC) Rich <rich@example.invalid> wrote:
>>> ruben safir <ruben@mrbrklyn.com> wrote:
>>>> So if an interupt device sends a signal, the signal has to identify
>>>> who it is, regardless.
>>>
>>> That is exactly how it works.  The device says "I need assistance", the
>>> bus cycles generated by the CPU in response ask "Who are you?" and the
>>> device responds with "I am number X". 
> 
>> This is usually done with the help of an Interupt Controller in the 
>> motherboard logic.
> 
> True, on more modern systems.  On older CPU's, if they had it at all,
> it was built in (and not nearly as powerful).
> 
I guess it depends on what you consider to be a modern system.

The interrupts of an IBM 704 (vacuum tube, 1950s era) worked just this
way. And all IBM's 70** series machines did too.
So also did the GE 625, 635, and 645 machines.
Also the mini-computers by DEC and Computer Control Corporation .
And Honeywell.

I cannot remember what the Control Data and Burroughs machines did.

I would not call any of those "modern". They all had a "transfer vector
table in the bottom addresses of hardware RAM.

-- 
  .~.  Jean-David Beyer          Registered Linux User 85642.
  /V\  PGP-Key:166D840A 0C610C8B Registered Machine  1935521.
 /( )\ Shrewsbury, New Jersey    http://linuxcounter.net
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operating systems design ruben safir <ruben@mrbrklyn.com> - 2015-01-29 17:11 -0500
  Re: operating systems design Rich <rich@example.invalid> - 2015-01-29 22:29 +0000
    Re: operating systems design ruben safir <ruben@mrbrklyn.com> - 2015-01-30 08:19 -0500
      Re: operating systems design "David W. Hodgins" <dwhodgins@nomail.afraid.org> - 2015-01-30 09:01 -0500
      Re: operating systems design Robert Heller <heller@deepsoft.com> - 2015-01-30 08:07 -0600
        Re: operating systems design Jeroen Belleman <jeroen@nospam.please> - 2015-01-30 15:43 +0100
          Re: operating systems design Robert Heller <heller@deepsoft.com> - 2015-01-30 09:09 -0600
      Re: operating systems design Rich <rich@example.invalid> - 2015-01-30 15:21 +0000
        Re: operating systems design Robert Heller <heller@deepsoft.com> - 2015-01-30 11:27 -0600
          Re: operating systems design Rich <rich@example.invalid> - 2015-01-30 19:10 +0000
            Re: operating systems design Jean-David Beyer <jeandavid8@verizon.net> - 2015-02-02 08:29 -0500
              Re: operating systems design Rich <rich@example.invalid> - 2015-02-02 15:09 +0000
      Re: operating systems design The Natural Philosopher <tnp@invalid.invalid> - 2015-02-03 00:11 +0000
  Re: operating systems design Jeroen Belleman <jeroen@nospam.please> - 2015-01-30 09:28 +0100
  Re: operating systems design The Natural Philosopher <tnp@invalid.invalid> - 2015-02-03 00:08 +0000
    Re: operating systems design Charlie Gibbs <cgibbs@kltpzyxm.invalid> - 2015-02-03 20:52 +0000
      Re: operating systems design The Natural Philosopher <tnp@invalid.invalid> - 2015-02-03 21:06 +0000
      Re: operating systems design Rich <rich@example.invalid> - 2015-02-03 21:19 +0000

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