Bob Bridges wrote on 11/8/2023 7:00 AM:
Let's see, how many nanoseconds is that again?
The answer to that is as relevant today as it was 50 years ago with
Bus and Tag cables: The speed of light is very close to 1 foot per
nanosecond. So making computer chips smaller and smaller inherently
Bob Bridges wrote on 11/8/2023 6:56 AM:
Reminds me of an old tagline:
/* The more sophisticated the technology, the more vulnerable it is to
primitive attack. People often overlook the obvious. -Dr Who, 1978 */
Long ago I was told why my shop didn't carpet the tape storage area.
The difference, if any, should be in the cache loading.
In practice. if I have to set up multiple base registers then I would wrap
everything in a macro, using LAY if there were only two base registers. For 3
or more I'd use LHI to load the last with 4096 and use LA for the second
through
Diagonal line, I never thought of that!
But I only just now realized why a dropped deck was never much of an issue
for me. (I'm slow.) I was, as I said, a $HASP operator - but a) the
social-scientist geeks who brought in large boxes of cards didn't care about
the order, and anyway I never
When I was at IBM, circa 1964, we had a keypunch department because ran
other businesses' work. The keypunch ladies were infinitely faster, did the
verification step and always added the sequence numbers so any oddities were
generally on you.
John T. Abell
Tel:800-295-7608
I used 026, 029, and 129 machines. (And the 010 machines; remember those!)
Never bothered me, but I agree with the comment that their use (and punched
cards in general) encouraged me to be much more careful with my "on paper"
programming before starting to punch cards. Dunno how to translate this
On Fri, 10 Nov 2023 at 08:27, Seymour J Metz wrote:
> I know that it's model dependent and also depends on the cache loading,
> but are there cases where there is a measurable performance difference
> between these?
>
> LAY Rx,4096
> LHI Rx,4096
>
It seems highly
I suspect that the extra halfword has more impact on performance than the
register, and I agree that the performance difference is probably negligible.
Just curious.
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
From:
On Fri, 10 Nov 2023 13:02:29 -0500, Tony Harminc wrote:
>On Thu, 9 Nov 2023 at 17:48, Paul Gilmartin <
>042bfe9c879d-dmarc-requ...@listserv.ua.edu> wrote:
>> >
>> I believe I saw one. A flat container of ferrite slurry with a
>> transparent top
>> and a diamagnetic membrane bottom. Pressed
On Thu, 9 Nov 2023 at 17:48, Paul Gilmartin <
042bfe9c879d-dmarc-requ...@listserv.ua.edu> wrote:
> On Thu, 9 Nov 2023 16:18:17 -0600, Glenn Knickerbocker wrote:
> >
> >I've heard tales (probably at KTRU) of reading magnetic tape/cards with
> iron filings and a loupe.
> >
> I believe I saw
>I know that it's model dependent and also depends on the cache loading, but
>are there cases where there is a measurable performance difference between
>these?
>
> LAY Rx,4096
> LHI Rx,4096
One aspect of the differences between the two is that LAY has a larger
Shmuel,
I know that it's model dependent and also depends on the cache loading, but
are there cases where there is a measurable performance difference between
these?
LAY Rx,4096
LHI Rx,4096
well, with LAY the second operand is an address with a base and an index
What bugs me about the newbies hating this "reminiscing" is they
may run into a situation where they can't get something to work
because they don't understand why the code has to be processed in
a certain fashion.
Many restrictions have been removed, but some still exist.
And then there are
That beats me; the best I can do is some time in the late '80s. I read
about an extension to an app we used, and sent off for it. It came in the
form of a card deck, and I had to ask around to find any old card reading we
might still have. There was one in one of our factories in VA, so I sent
I know that it's model dependent and also depends on the cache loading, but
are there cases where there is a measurable performance difference between
these?
LAY Rx,4096
LHI Rx,4096
--
Shmuel (Seymour J.) Metz
http://mason.gmu.edu/~smetz3
עַם יִשְׂרָאֵל חַי
On 23Nov08:1703+, Schmitt, Michael wrote:
> Are we violating the "no reminiscing" rule?
No, we're providing historical data for the young'uns.
>
> What's the latest that people still used punched cards and/or paper tape?
In the 21st Century, I encountered an IOCP deck for a 3081
at a shop
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