Sujet : Re: is Vax addressing sane today
De : mitchalsup (at) *nospam* aol.com (MitchAlsup1)
Groupes : comp.archDate : 09. Sep 2024, 01:27:39
Autres entêtes
Organisation : Rocksolid Light
Message-ID : <09ce1622b872f0b0fa944e868a8c97be@www.novabbs.org>
References : 1 2 3 4 5 6 7
User-Agent : Rocksolid Light
On Sun, 8 Sep 2024 21:09:39 +0000, Lawrence D'Oliveiro wrote:
On Sun, 8 Sep 2024 17:56:55 +0000, MitchAlsup1 wrote:
>
The problem with VAX was NOT that one could not put a lot of work in a
single instruction;
>
no,
>
The problem with VAX is that it made putting too much work in a single
instruction easy.
>
Perhaps there is also the issue of the wildly-variable instruction
length.
A single VAX operand descriptor could be up to 6 bytes; I think the
instruction with the most general-format operands could have 6 of them:
so, plus opcode, such an instruction could be 37 bytes long.
I have not heard an argument that the complex things in VAX ISA are
a) desirable
b) performance helpful
I (sort of) think VAX ISA as a grown up PDP-11, ignoring all the
dastardly complicated instructions it inflicted upon itself. AND
it did inflict those things upon itself.
Restricting a new-VAX-like ISA to 1-2-3 Operand and 1-result with
at most 1 exception would result in a MUCH cleaner and easier to
build machine.
While the shortest instruction could be just 1 byte.
>
Even those who are talking about “post-RISC” are, I think, still in
favour of RISC-style fixed instruction lengths.
I, for the record, are in favor of fixed length instruction-specifier
followed by constants the entirety is the instruction, while the
former minimizes your ability of shooting yourself in the foot.
Date | Sujet | # | | Auteur |
5 Sep 24 | is Vax adressing sane today | 336 | | Brett |
5 Sep 24 | Re: is Vax adressing sane today | 324 | | John Dallman |
6 Sep 24 | Re: is Vax adressing sane today | 1 | | Lawrence D'Oliveiro |
6 Sep 24 | Re: is Vax adressing sane today | 322 | | Anton Ertl |
6 Sep 24 | Re: is Vax adressing sane today | 1 | | Lawrence D'Oliveiro |
6 Sep 24 | Re: is Vax adressing sane today | 5 | | MitchAlsup1 |
7 Sep 24 | Re: is Vax adressing sane today | 4 | | Anton Ertl |
7 Sep 24 | Re: is Vax adressing sane today | 3 | | Anton Ertl |
7 Sep 24 | Re: is Vax addressing sane today | 2 | | John Dallman |
7 Sep 24 | Re: is Vax addressing sane today | 1 | | Anton Ertl |
7 Sep 24 | Re: is Vax adressing sane today | 313 | | John Levine |
8 Sep 24 | Re: is Vax adressing sane today | 312 | | Anton Ertl |
8 Sep 24 | Re: is Vax adressing sane today | 304 | | MitchAlsup1 |
8 Sep 24 | Re: is Vax addressing sane today | 303 | | Lawrence D'Oliveiro |
9 Sep 24 | Re: is Vax addressing sane today | 231 | | MitchAlsup1 |
9 Sep 24 | Re: is Vax addressing sane today | 230 | | Brett |
9 Sep 24 | Re: is Vax addressing sane today | 7 | | MitchAlsup1 |
10 Sep 24 | Re: is Vax addressing sane today | 6 | | Niklas Holsti |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
25 Sep 24 | Re: is Vax addressing sane today | 4 | | Stephen Fuld |
25 Sep 24 | Re: is Vax addressing sane today | 3 | | Michael S |
25 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
25 Sep 24 | Re: is Vax addressing sane today | 1 | | Niklas Holsti |
10 Sep 24 | Re: is Vax addressing sane today | 222 | | Anton Ertl |
10 Sep 24 | Re: is Vax addressing sane today | 4 | | Michael S |
10 Sep 24 | Re: is Vax addressing sane today | 3 | | Anton Ertl |
10 Sep 24 | Re: is Vax addressing sane today | 1 | | Niklas Holsti |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | Michael S |
11 Sep 24 | Re: is Vax addressing sane today | 7 | | Lawrence D'Oliveiro |
11 Sep 24 | Re: is Vax addressing sane today | 6 | | Michael S |
11 Sep 24 | Re: is Vax addressing sane today | 5 | | David Brown |
11 Sep 24 | Re: is Vax addressing sane today | 2 | | Thomas Koenig |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | David Brown |
11 Sep 24 | Re: is Vax addressing sane today | 2 | | David Schultz |
13 Sep 24 | Re: is Vax addressing sane today | 1 | | David Brown |
11 Sep 24 | Re: is Vax addressing sane today | 5 | | John Levine |
11 Sep 24 | Re: is Vax addressing sane today | 4 | | Thomas Koenig |
11 Sep 24 | Re: is Vax addressing sane today | 2 | | Anton Ertl |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | jseigh |
11 Sep 24 | Re: is Vax addressing sane today | 1 | | John Levine |
20 Sep 24 | Re: is Vax addressing sane today | 205 | | Kent Dickey |
21 Sep 24 | Re: is Vax addressing sane today | 4 | | MitchAlsup1 |
21 Sep 24 | Re: is Vax addressing sane today | 3 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
21 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 4 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 3 | | MitchAlsup1 |
21 Sep 24 | Re: is Vax addressing sane today | 1 | | Niklas Holsti |
21 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
21 Sep 24 | Re: is Vax addressing sane today | 30 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 18 | | John Levine |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | Michael S |
22 Sep 24 | Re: except what, is Vax addressing sane today | 8 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: except what, is Vax addressing sane today | 7 | | Chris M. Thomasson |
22 Sep 24 | Re: except what, is Vax addressing sane today | 6 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | Chris M. Thomasson |
22 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | John Dallman |
22 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | MitchAlsup1 |
22 Sep 24 | Re: except what, is Vax addressing sane today | 5 | | Terje Mathisen |
24 Sep 24 | Re: except what, is Vax addressing sane today | 4 | | Lawrence D'Oliveiro |
24 Sep 24 | Re: except what, is Vax addressing sane today | 3 | | Chris M. Thomasson |
24 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | MitchAlsup1 |
16 Oct 24 | Re: except what, is Vax addressing sane today | 1 | | Chris M. Thomasson |
22 Sep 24 | Re: except what, is Vax addressing sane today | 3 | | Lars Poulsen |
24 Sep 24 | Re: except what, is Vax addressing sane today | 2 | | Lawrence D'Oliveiro |
24 Sep 24 | Re: except what, is Vax addressing sane today | 1 | | Michael S |
22 Sep 24 | Re: is Vax addressing sane today | 7 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: is Vax addressing sane today | 6 | | MitchAlsup1 |
22 Sep 24 | Re: is Vax addressing sane today | 3 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
22 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
22 Sep 24 | Re: is Vax addressing sane today | 2 | | Anton Ertl |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
24 Sep 24 | Re: is Vax addressing sane today | 2 | | Stefan Monnier |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
25 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
12 Oct 24 | Re: is Vax addressing sane today | 1 | | Anton Ertl |
22 Sep 24 | Re: is Vax addressing sane today | 4 | | Thomas Koenig |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Kent Dickey |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | Bill Findlay |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | Thomas Koenig |
23 Sep 24 | Re: is Vax addressing sane today | 1 | | Stefan Monnier |
23 Sep 24 | Re: is Vax addressing sane today | 161 | | Kent Dickey |
24 Sep 24 | Re: is Vax addressing sane today | 11 | | MitchAlsup1 |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | Lawrence D'Oliveiro |
24 Sep 24 | Re: is Vax addressing sane today | 9 | | Terje Mathisen |
24 Sep 24 | Re: is Vax addressing sane today | 4 | | Michael S |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Terje Mathisen |
24 Sep 24 | Re: is Vax addressing sane today | 2 | | Michael S |
24 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Stephen Fuld |
24 Sep 24 | Re: is Vax addressing sane today | 2 | | MitchAlsup1 |
25 Sep 24 | Re: is Vax addressing sane today | 1 | | Stephen Fuld |
12 Oct 24 | Re: is Vax addressing sane today | 1 | | Anton Ertl |
24 Sep 24 | Re: is Vax addressing sane today | 3 | | Terje Mathisen |
29 Sep 24 | Re: is Vax addressing sane today | 1 | | Michael S |
7 Oct 24 | Re: is Vax addressing sane today | 1 | | Kent Dickey |
25 Sep 24 | Re: is Vax addressing sane today | 133 | | MitchAlsup1 |
26 Sep 24 | Re: is Vax addressing sane today | 1 | | MitchAlsup1 |
28 Sep 24 | Re: is Vax addressing sane today | 131 | | Lawrence D'Oliveiro |
28 Sep 24 | Re: is Vax addressing sane today | 3 | | George Neuner |
7 Oct 24 | Re: is Vax addressing sane today | 8 | | Kent Dickey |
12 Oct 24 | Re: is Vax addressing sane today | 2 | | Anton Ertl |
9 Sep 24 | Re: is Vax addressing sane today | 71 | | Anton Ertl |
8 Sep 24 | Re: is Vax adressing sane today | 7 | | Brett |
8 Sep 24 | Re: is Vax adressing sane today | 2 | | MitchAlsup1 |
6 Sep 24 | Re: is Vax adressing sane today | 2 | | MitchAlsup1 |
6 Sep 24 | Re: is Vax adressing sane today | 1 | | Lawrence D'Oliveiro |
6 Sep 24 | Re: is Vax adressing sane today | 8 | | Anton Ertl |