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by jackokring
Wed Apr 09, 2014 6:16 am
Forum: Advanced users
Topic: Heartbleed openssl vulnerability
Replies: 58
Views: 20783

Re: Heartbleed openssl vulnerability

Of course you can also self sign your own keys, but this leads to the site user having an annoying dialog box pop up which should say "Self signed key. Someone didn't pay the arbitrary rich corporations for providing the apparent service of suppressing this dialog box."
by jackokring
Tue Apr 08, 2014 9:22 pm
Forum: Compute Module
Topic: USB Boot
Replies: 29
Views: 21629

Re: USB Boot

The no SD is just a minor cost save possibilities. The more real idea is having one SD with the master firmware and kernel revision on. So assuming say each model A has an 8GB card, then it's just a matter of not putting a bootcode.bin on, fetching that from the model B, booting the kernel off the m...
by jackokring
Tue Apr 08, 2014 4:01 pm
Forum: Compute Module
Topic: USB Boot
Replies: 29
Views: 21629

Re: USB Boot

So the model A (power USB in) has a data connection (B does not)...? No. The model A and model B Pi boards are identical. There is no data connection to the Power In USB on either of them. The single USB port on the model A is capable of working as a USB slave (OTG mode). The model B cannot do that...
by jackokring
Tue Apr 08, 2014 3:06 pm
Forum: Compute Module
Topic: USB Boot
Replies: 29
Views: 21629

Re: USB Boot

So the model A (power USB in) has a data connection (B does not), and when the SD has no .bin, it checks the USB master for boot information? I suppose the best thing that this would allow from my prospective is not to need extra SD cards to run a second Pi. I wonder if a remote boot loader will be ...
by jackokring
Tue Apr 08, 2014 7:00 am
Forum: Graphics, sound and multimedia
Topic: LCD, celcius degree character … and chr(223) not working
Replies: 24
Views: 9415

Re: LCD, celcius degree character … and chr(223) not working

The problem stems from Unicode encoding. Values above 127 are encoded in more than one byte in Unicode UTF-8. The LCD requires single byte display codes. Thus to print a single character with an index above 127, it requires some non Unicode method of sending bytes to the display. there is no workaro...
by jackokring
Mon Apr 07, 2014 9:02 pm
Forum: Beginners
Topic: Will NOOBS recovery console wipe the OS, or repair?
Replies: 4
Views: 3544

Re: Will NOOBS recovery console wipe the OS, or repair?

It will erase your settings, as a fresh install. Things to try:

1) man fsck
2) copy /home and /etc to another ext4 disk, and write them back after a fresh install
3) copy your SD before trying anything else
by jackokring
Mon Apr 07, 2014 7:23 pm
Forum: Compute Module
Topic: Does this mean we'll get a cut down OS ...?
Replies: 45
Views: 7390

Re: Does this mean we'll get a cut down OS ...?

sudo apt-get remove ........ The problem is really the large number of packages that have to be removed. For example x11 when removed, also removes all packages that depend on it. So it just needs a list of the big "packages" which remove large amounts in a modular manor. x11 But it appears like fi...
by jackokring
Mon Apr 07, 2014 6:19 pm
Forum: Beginners
Topic: FIFO
Replies: 2
Views: 526

Re: FIFO

First In First Out. Also called a queue, or que or pipe. The time sequential order is maintained when information is passed.
by jackokring
Mon Apr 07, 2014 5:05 pm
Forum: Compute Module
Topic: Does this mean we'll get a cut down OS ...?
Replies: 45
Views: 7390

Re: Does this mean we'll get a cut down OS ...?

I think a few people have cut down rasbian. Although it's also possible to use a USB micro stick and just use less than 64M for the /boot. Also it looks that in the future this 4GB limit may not be as big a problem as you think. https://sites.google.com/site/rubikcompression/the-standard and some of...
by jackokring
Sun Apr 06, 2014 11:03 am
Forum: Networking and servers
Topic: headless wifi setup: easiest approach?
Replies: 24
Views: 15496

Re: headless wifi setup: easiest approach?

put the required files on the SD card using another system before booting the pi. Not exactly what you asked, but I'd assume you use another system to burn the SD images.
by jackokring
Fri Apr 04, 2014 5:18 pm
Forum: General discussion
Topic: New Website
Replies: 94
Views: 35489

Re: New Website

Even on an eeepc it's way too graphically big. Somehow it's not been designed to fit much on apart from excessive photo content. As contents go, each photo could have been 1/4 the size, and a zoom for the partially sighted.
by jackokring
Mon Mar 31, 2014 12:56 pm
Forum: Off topic discussion
Topic: Backdoors Everywhere
Replies: 14
Views: 5866

Re: Backdoors Everywhere

There are likely hard ways to crack any standard coding, and master keys do help to install any keys, I'd assume. There is no such thing as total security of transport of information unless you own some expensive stuff and have lots of protected land run by yourself. Cryptography just prevents non a...
by jackokring
Sun Mar 30, 2014 10:09 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI noise based on CPU load
Replies: 5
Views: 1901

Re: SPI noise based on CPU load

Also the analog input impedances matter. To sense low noise on a high impedance is a very difficult task.
by jackokring
Sat Mar 29, 2014 9:49 pm
Forum: Other projects
Topic: STICKY: The projects list. Look here for some ideas.
Replies: 233
Views: 386350

Re: The projects list. Look here for some ideas.

https://sites.google.com/site/rubikcompression/home for a free for the Pi software idea. Probly needs to be written as a shader, and also as a kernel module as a VFS file system driver. You might not believe it at first, but persevere.
by jackokring
Sun Feb 23, 2014 7:15 pm
Forum: General discussion
Topic: Raspberry Pi with more RAM
Replies: 43
Views: 8269

Re: Raspberry Pi with more RAM

I think we'd all love a beefed up pi, but if the Foundation can't do that and retain the price point, then it's no longer a cheap throwaway educational computer, but yet another dev board. From what I understand, in order to upgrade, they'd need to source a new SoC. That means throwing out all of t...
by jackokring
Sun Feb 23, 2014 12:30 pm
Forum: Staffroom, classroom and projects
Topic: Where to start
Replies: 2
Views: 1514

Re: Where to start

To program android you will eventually need a little Java experience, and so experience of using resource management. The question is 'do you have any programming experience?' I ask this because Java is probably not the easiest first computer language. It requires a knowledge of 'static typing' whic...
by jackokring
Sun Feb 23, 2014 4:19 am
Forum: Graphics, sound and multimedia
Topic: Beta testers needed - HW cursor testing
Replies: 113
Views: 21777

Re: Beta testers needed

I might give it a whizz later in the week. Currently using latest firmware and using jessie. Does this change the install procedure?
by jackokring
Sun Feb 23, 2014 4:06 am
Forum: General discussion
Topic: run programs at CLI from web
Replies: 10
Views: 2885

Re: run programs at CLI from web

Yes it is possible using the "/cgi-bin/" directory. It is not simple to set up, and does require a detailed understanding in order that you have enough security to not let other people execute your scripts which may do damage to your system.
by jackokring
Sun Feb 23, 2014 4:03 am
Forum: Raspbian
Topic: Jessie, apt-get dist-upgrade and 404's
Replies: 12
Views: 10589

Re: Jessie, apt-get dist-upgrade

The dist-upgrade seems to work now with some complaining, but no unsolvable errors. I haven't tried many things but X starts, and Mathematica works. There's a new version of the C compiler, and all the wayland errors have gone.
by jackokring
Fri Feb 21, 2014 11:38 pm
Forum: General discussion
Topic: graphic user interface
Replies: 13
Views: 2396

Re: graphic user interface

Code: Select all

startx
Perhaps this is what was needed ...
by jackokring
Fri Feb 21, 2014 11:36 pm
Forum: General discussion
Topic: Raspberry Pi with more RAM
Replies: 43
Views: 8269

Re: Raspberry Pi with more RAM

You could connect 2 pis via ethernet cat5e and use each for a specific processing role. This would double your memory and processing resources. I often wonder what type of video processing people do to need more memory?
by jackokring
Wed Dec 18, 2013 11:34 pm
Forum: General discussion
Topic: How to connect this E ink Display
Replies: 20
Views: 24466

Re: How to connect this E ink Display

Just wondering if the phrase "E-Ink" implies frame persistence, and allows a slow update when the display needs to be changed.

ASIC: Application Specific (to the application) Integrated Circuit
by jackokring
Wed Dec 18, 2013 7:09 pm
Forum: Off topic discussion
Topic: 4TB USB drive and Windows XP?
Replies: 5
Views: 3338

Re: 4TB USB drive and Windows XP?

As you need to use the drive under windows, then the GPT option seems best. For Linux only, a better option (as GPT needs a kernel recompile according to some web sites) maybe to create 2 2TB partitions, and mount them in such a way that one is a subdirectory within the other. You will end up having...
by jackokring
Sun Dec 08, 2013 11:20 pm
Forum: General discussion
Topic: Berryboot vs NOOBS
Replies: 11
Views: 17860

Re: Berryboot vs NOOBS

The absolute simplest would be one command to save the current /boot, and one to select from the saved. The only remaining difficulty is selecting root= to be a subdirectory and not a partition in cmdline.txt in /boot. I thought NOOBS was excellent, even though I'm using raspbian jessie on a USB (32...
by jackokring
Sat Dec 07, 2013 3:41 pm
Forum: General discussion
Topic: Request for ultra low power pi
Replies: 51
Views: 14732

Re: Request for ultra low power pi

Well the obvious solution to this is a peltier cell dehumidifying (freeze drying) a turd, while another peltier gets heat from burning said dry turd later to create work, and the excess can run a pi. Twerk that funky by product! :D Ok, don't listen, and just wet flush all the trace minerals off the ...

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