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by RichardS
Wed May 23, 2018 12:17 am
Forum: General discussion
Topic: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?
Replies: 7
Views: 3387

Re: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?

Ok, here's a simplified script to allow you to use the gmp-chudnovsky program I showed you how to compile in my first post to do a massive multi-million digit Pi calculation and then check the accuracy of EVERY DIGIT using a md5sum, which is a really great way to check on the system integrity of you...
by RichardS
Tue May 22, 2018 5:51 pm
Forum: General discussion
Topic: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?
Replies: 7
Views: 3387

Re: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?

Takes 13 m 38 s on my Pi 3b+ - including digit display time. Program reports "Total time" of 458 s before digit display starts. Alan. Great that you were able to get it working Yep, your times sound about right. That's what I also get for 40 Million digits when I run it on my Pi 3's. Pi 3...
by RichardS
Tue May 22, 2018 7:06 am
Forum: General discussion
Topic: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?
Replies: 7
Views: 3387

Re: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?

by comparing a mid nineteen-eighties Crey-2 supercomputer with a Raspberry Pi Zero. This may be more a demonstration of the importance of mathematics and algorithms: the Chudnovsky algorithm for calculating Pi did not exist until 1989. Coolnesss factor aside, the Cray 2 has Linpack score of 1.4 Gfl...
by RichardS
Tue May 22, 2018 12:45 am
Forum: General discussion
Topic: Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?
Replies: 7
Views: 3387

Pi Zero vs Cray-2 --- Bambi vs Godzilla who will win?

Here's a nice "Pi Day" (Mar 14) demonstration I came up with this year that nicely ties in the Raspberry Pi, the number Pi, and a bit of history, in a way that shows just how far computers have advanced in only a single generation by comparing a mid nineteen-eighties Crey-2 supercomputer w...
by RichardS
Mon May 21, 2018 7:47 am
Forum: Graphics programming
Topic: MPEG2 patents expiring
Replies: 34
Views: 23865

Re: MPEG2 patents expiring

The various remarks above are misleading. Not to be contentious, but I did make the distinction - in fact I begged the Pi Foundation to clarify - because the past story has always been that the Pi Foundation (and by extension heroic lovely wonderful folks at Broadcom) had no choice but to pass alon...
by RichardS
Sun May 20, 2018 8:00 pm
Forum: Graphics programming
Topic: MPEG2 patents expiring
Replies: 34
Views: 23865

Re: MPEG2 patents expiring

I have been patient, in the past when I pointed out that ALL the RELEVANT MPEG 2 patents had expired a year ago (I.e. all those that involved technology that the Pi actually needed to decode MPEG2 program streams) - but was told then that due to the intricacies of how patent royalty agreements work,...
by RichardS
Mon Sep 11, 2017 10:55 pm
Forum: General discussion
Topic: STICKY: USB boot now working on Pi3
Replies: 544
Views: 362301

Re: STICKY: USB boot now working on Pi3

There are various ways to find the model of your Pi. One of the simplest (in Raspbian) is to check the contents of /sys/firmware/devicetree/base/model Thanks that's good info. Assuming that the Pi Foundation is smarter than most, and NEVER changes boot code without at least bumping the minor model ...
by RichardS
Mon Sep 11, 2017 4:16 pm
Forum: General discussion
Topic: STICKY: USB boot now working on Pi3
Replies: 544
Views: 362301

Re: STICKY: USB boot now working on Pi3

new PI-2's not old ones . . . Good point --> NEW ONES<-- Be nice to be able to tell the difference don't you think??? I am aware of the RPI command : vcgencmd version -- but this just seems to list the version of the second stage boot code that loads from the SD, USB, etc. while the Pi is booting, ...
by RichardS
Sat Mar 25, 2017 5:40 am
Forum: General discussion
Topic: Pi Foundation is overcharging for MPEG2 Licenses
Replies: 18
Views: 7667

Pi Foundation is overcharging for MPEG2 Licenses

I just went to get an MPEG2 license for my new Raspberry Pi, expecting that it would now be either FREE, or at most 0.50 USD equivelent (since the Pi Foundation has always maintained that they were merely passing on their unavoidable cost for this license, and MPEGLA has lowered this fee as of 2016)...

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