Sujet : Re: address architecture, not interactive use, The Design of Design
De : SFuld (at) *nospam* alumni.cmu.edu.invalid (Stephen Fuld)
Groupes : comp.archDate : 10. May 2024, 07:28:33
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <v1keqh$17069$1@dont-email.me>
References : 1 2 3 4 5
User-Agent : XanaNews/1.21-f3fb89f (x86; Portable ISpell)
John Levine wrote:
According to Stephen Fuld <SFuld@alumni.cmu.edu.invalid>:
In Design of Design, Brooks said they knew about virtual memory but
thought it was too expensive, which he also says was a mistake,
soon >> fixed in S/370.
While I agree that virtual memory was probably too expensive in the
mid 1960s, I disagree that it was required, or even the optimal
solution back then. A better solution would have been to have a
small number of "base registers" that were not part of the user
set, but could be reloaded by the OS whenever a program needed to
be swapped in to a different address than it was swapped out to.
Well, Brooks was there and said not having virtual memory was a
mistake. Dunno how much that is related to Lynn's point that paging
let them avoid the consequences of terrible storage management in MVS.
MVT?
When designing the address structure of S/360 they had a big problem
in that they knew they wanted large addresses, 24 bits to be extended
later to 31 or 32, but they didn't want to waste a full word on every
address in programs running on small models. Base register with 12 bit
offset solved that quite well, making the address part of an
instruction 16 bits while not segmenting the memory. Since there were
a lot of registers it was usually possible to set up a few base
registers at the start of a routine and not do a lot of reloading. (At
least if the compiler was smart enough; Fortran G had a bad habit of
loading an address from the constant pool every time it wanted to use
a variable or an array.)
Brooks said it was ugly that some instructions (RX) had both base and
index registers while others (SS) only had base registers, which I
expect made it even harder to do what you suggested.
Good points. I'll have to think about it.
-- - Stephen Fuld (e-mail address disguised to prevent spam)
Date | Sujet | # | | Auteur |
21 Apr 24 | The Design of Design | 128 | | Thomas Koenig |
21 Apr 24 | Re: The Design of Design | 67 | | John Levine |
25 Apr 24 | Re: The Design of Design | 66 | | Thomas Koenig |
25 Apr 24 | Re: The Design of Design | 65 | | Stephen Fuld |
26 Apr 24 | Re: The Design of Design | 56 | | John Levine |
26 Apr 24 | Re: The Design of Design | 2 | | MitchAlsup1 |
26 Apr 24 | Re: The Design of Design | 1 | | John Levine |
26 Apr 24 | Re: The Design of Design | 50 | | Thomas Koenig |
26 Apr 24 | Re: The Design of Design | 1 | | Stephen Fuld |
26 Apr 24 | Re: The Design of Design | 47 | | John Levine |
27 Apr 24 | Re: The Design of Design | 4 | | Thomas Koenig |
27 Apr 24 | Re: PDP-10 addressing, was The Design of Design | 3 | | John Levine |
27 Apr 24 | Re: PDP-10 addressing, was The Design of Design | 2 | | MitchAlsup1 |
27 Apr 24 | Re: PDP-10 addressing, was The Design of Design | 1 | | John Levine |
30 Apr 24 | Re: The Design of Design | 42 | | MitchAlsup1 |
30 Apr 24 | Re: The Design of Design | 40 | | John Levine |
1 May 24 | Re: The Design of Design | 39 | | Tim Rentsch |
1 May 24 | Re: architecture, The Design of Design | 38 | | John Levine |
2 May 24 | Re: index architecture, The Design of Design | 1 | | John Levine |
2 May 24 | Re: architecture, The Design of Design | 4 | | Thomas Koenig |
3 May 24 | Re: architecture, The Design of Design | 1 | | MitchAlsup1 |
5 May 24 | Re: architecture, The Design of Design | 2 | | Thomas Koenig |
5 May 24 | Re: ancient 704 architecture, The Design of Design | 1 | | John Levine |
7 May 24 | Re: architecture, The Design of Design | 32 | | Tim Rentsch |
7 May 24 | Re: architecture, The Design of Design | 1 | | Thomas Koenig |
7 May 24 | Re: architecture, The Design of Design | 28 | | Michael S |
7 May 24 | Re: architecture, The Design of Design | 2 | | John Levine |
8 May 24 | Re: architecture, The Design of Design | 1 | | John Levine |
8 May 24 | Re: architecture, The Design of Design | 2 | | Tim Rentsch |
9 May 24 | Re: architecture, The Design of Design | 1 | | John Levine |
8 May 24 | Re: architecture, The Design of Design | 23 | | Thomas Koenig |
8 May 24 | Re: architecture, The Design of Design | 22 | | Michael S |
8 May 24 | Re: backward architecture, The Design of Design | 21 | | John Levine |
9 May 24 | Re: backward architecture, The Design of Design | 2 | | Lynn Wheeler |
10 May 24 | Re: backward architecture, The Design of Design | 1 | | Lynn Wheeler |
9 May 24 | Re: backward architecture, The Design of Design | 18 | | Michael S |
9 May 24 | Re: backward architecture, The Design of Design | 14 | | Thomas Koenig |
9 May 24 | Re: backward architecture, The Design of Design | 13 | | Michael S |
9 May 24 | Re: backward architecture, The Design of Design | 2 | | Anton Ertl |
9 May 24 | Re: backward architecture, The Design of Design | 1 | | Anton Ertl |
9 May 24 | Re: backward architecture, The Design of Design | 9 | | Stephen Fuld |
9 May 24 | Re: backward architecture, The Design of Design | 2 | | Michael S |
9 May 24 | Re: backward architecture, The Design of Design | 1 | | John Dallman |
10 May 24 | Re: backward architecture, The Design of Design | 6 | | Tim Rentsch |
10 May 24 | Re: backward architecture, The Design of Design | 5 | | Stephen Fuld |
30 May 24 | Re: backward architecture, The Design of Design | 4 | | Tim Rentsch |
30 May 24 | Re: backward architecture, The Design of Design | 3 | | Stephen Fuld |
30 May 24 | Re: backward architecture, The Design of Design | 2 | | Tim Rentsch |
31 May 24 | Re: backward architecture, The Design of Design | 1 | | John Levine |
10 May 24 | Re: backward architecture, The Design of Design | 1 | | Tim Rentsch |
10 May 24 | Re: backward architecture, The Design of Design | 1 | | John Levine |
10 May 24 | Re: backward architecture, The Design of Design | 2 | | Tim Rentsch |
10 May 24 | Re: backward architecture, The Design of Design | 1 | | John Levine |
7 May 24 | Re: architecture, The Design of Design | 2 | | Anton Ertl |
8 May 24 | Re: architecture, The Design of Design | 1 | | Tim Rentsch |
30 Apr 24 | Re: The Design of Design | 1 | | MitchAlsup1 |
30 Apr 24 | Re: what's a register, The Design of Design | 1 | | John Levine |
26 Apr 24 | Re: The Design of Design | 3 | | Stephen Fuld |
26 Apr 24 | Re: The Design of Design | 2 | | John Levine |
26 Apr 24 | Re: The Design of Design | 1 | | Stephen Fuld |
27 Apr 24 | Re: The Design of Design | 7 | | Thomas Koenig |
27 Apr 24 | Re: The Design of Design | 1 | | Stephen Fuld |
27 Apr 24 | Re: The Design of Design | 2 | | John Levine |
27 Apr 24 | Re: The Design of Design | 1 | | Thomas Koenig |
28 Apr 24 | Re: The Design of Design | 3 | | Tim Rentsch |
29 Apr 24 | Re: antitrust history, The Design of Design | 2 | | John Levine |
1 May 24 | Re: antitrust history, The Design of Design | 1 | | Tim Rentsch |
29 Apr 24 | Re: The Design of Design | 1 | | Tim Rentsch |
29 Apr 24 | Re: The Design of Design | 60 | | Tim Rentsch |
1 May 24 | Re: The Design of Design | 59 | | Stephen Fuld |
1 May 24 | Re: JCL, The Design of Design | 3 | | John Levine |
1 May 24 | Re: JCL, The Design of Design | 2 | | Stephen Fuld |
1 May 24 | Re: JCL, The Design of Design | 1 | | Stephen Fuld |
1 May 24 | Re: The Design of Design | 1 | | MitchAlsup1 |
1 May 24 | Re: The Design of Design | 1 | | Thomas Koenig |
7 May 24 | Re: The Design of Design | 53 | | Tim Rentsch |
7 May 24 | Re: The Design of Design | 45 | | Stephen Fuld |
7 May 24 | Re: The Design of Design | 1 | | Thomas Koenig |
7 May 24 | Re: The Design of Design | 33 | | Stephen Fuld |
7 May 24 | Re: The Design of Design | 29 | | Thomas Koenig |
7 May 24 | Re: The Design of Design | 28 | | Stephen Fuld |
7 May 24 | Re: interative use, The Design of Design | 25 | | John Levine |
7 May 24 | Re: interative use, The Design of Design | 4 | | MitchAlsup1 |
8 May 24 | Re: third system syndrome, interactive use, The Design of Design | 3 | | John Levine |
8 May 24 | Re: third system syndrome, interactive use, The Design of Design | 2 | | Lynn Wheeler |
9 May 24 | Re: third system syndrome, interactive use, The Design of Design | 1 | | Lynn Wheeler |
8 May 24 | Re: interative use, The Design of Design | 20 | | Stephen Fuld |
8 May 24 | Re: interative use, The Design of Design | 19 | | John Levine |
9 May 24 | Re: interative use, The Design of Design | 18 | | Stephen Fuld |
10 May 24 | Re: address architecture, not interactive use, The Design of Design | 17 | | John Levine |
10 May 24 | Re: address architecture, not interactive use, The Design of Design | 1 | | Stephen Fuld |
11 May 24 | Re: address architecture, not interactive use, The Design of Design | 15 | | Thomas Koenig |
11 May 24 | Re: address architecture, not interactive use, The Design of Design | 3 | | MitchAlsup1 |
12 May 24 | Re: address architecture, not interactive use, The Design of Design | 2 | | Thomas Koenig |
13 May 24 | Re: address architecture, not interactive use, The Design of Design | 1 | | MitchAlsup1 |
11 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 11 | | John Levine |
12 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 10 | | Thomas Koenig |
13 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 9 | | John Levine |
13 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 8 | | Thomas Koenig |
13 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 7 | | John Levine |
13 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 4 | | MitchAlsup1 |
14 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 1 | | Thomas Koenig |
25 May 24 | Re: branch address architecture, not interactive use, The Design of Design | 1 | | Anton Ertl |
8 May 24 | Re: The Design of Design | 2 | | Thomas Koenig |
10 May 24 | Re: The Design of Design | 3 | | Tim Rentsch |
30 May 24 | Re: The Design of Design | 10 | | Tim Rentsch |
7 May 24 | Re: The Design of Design | 7 | | Thomas Koenig |