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by mikerr
Sat Nov 03, 2018 5:44 pm
Forum: Advanced users
Topic: x86 on the Raspberry Pi with jessie chroot
Replies: 18
Views: 6135

Re: x86 on the Raspberry Pi with jessie chroot

The main thing is qemu which is used to emulate x86 on the pi. Exagear is essentially an x86 chroot install with a modified/optimized qemu and wine(if using Windows apps) You need to compile your own kernel for 3/1 memory split. Also have a prebuilt image here: https://github.com/mikerr/RPi-QEMU-x86...
by mikerr
Fri Nov 02, 2018 10:36 pm
Forum: Off topic discussion
Topic: Imagine Apple Pi
Replies: 5
Views: 1335

Re: Imagine Apple Pi

Err, Apple is really the opposite of everything raspberry pi stands for (originally at least) Apple sell high priced self contained devices which do their best to hide their inner workings and complexity, and are very restrictive and locked down from modification. Raspberry pi are cheap devices, sol...
by mikerr
Fri Nov 02, 2018 12:15 pm
Forum: General discussion
Topic: Whoa, cheap flash memory prices?!
Replies: 24
Views: 2442

Re: Whoa, cheap flash memory prices?!

Given that 8GB cards either cost more, or are hard to get, I cant see the down side of getting a 16GB or 32GB card. You don't have to use the space :) £5.99 here for a 16GB sandisk A1. https://www.amazon.co.uk/SanDisk-microSDHC-Memory-Adapter-Performance/dp/B073S9SFK2/ref=sr_1_19?ie=UTF8&qid=154115...
by mikerr
Mon Oct 29, 2018 8:44 pm
Forum: Media centres
Topic: pidvbip / tvheadend as set top box
Replies: 7
Views: 6879

Re: pidvbip / tvheadend as set top box

The main piDVBip repo requires the hardware mpeg codec to be enabled / purchased on the pi

Newer pi2 & 3 are fast enough to do mpeg decoding in software, so there is a CPU version here:
https://github.com/mikerr/pidvbip-cpu

Both could do with updating, and will be now I have a shiny new TV HAT :)
by mikerr
Tue Oct 23, 2018 12:50 pm
Forum: General discussion
Topic: Oh damn, it's happened! Charging a lot of pis?
Replies: 10
Views: 1437

Re: Oh damn, it's happened! Charging a lot of pis?

Surprisingly they do seem to use the same 3-4A regulator on both the Duo Pi and Quattro Pi
which gives the duo-based racks more headroom (2A per pi vs 1A per pi)
( the 20 node rack uses duo, the 40 node quattro pi)
by mikerr
Tue Oct 23, 2018 11:40 am
Forum: General discussion
Topic: Oh damn, it's happened! Charging a lot of pis?
Replies: 10
Views: 1437

Re: Oh damn, it's happened! Charging a lot of pis?

Do you want to completely DIY this ? If you want more ready made solutions, check out the various Bitscope Blades, http://bitscope.com/product/blade/ e.g. the quattro blade: http://my.bitscope.com/store/?p=view&i=item+2 its powering each pi via GPIO header - much neater than lots of micro usb cables...
by mikerr
Wed Oct 17, 2018 2:21 pm
Forum: Mathematica
Topic: Matematica removed from raspbian image
Replies: 39
Views: 26519

Re: Matematica removed from raspbian image

I guess they chose not to do that originally because they wanted to maintain only single full and lite downloads. Or the original agreement specified it was to be present by default ? Anyway it will remain available, and notice their site has been changed a few days ago specifically to add details ...
by mikerr
Thu Oct 11, 2018 3:46 pm
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 11408

Re: Diskless booting Zeroes from Windows

I read somewhere on the forumn that if a bootable SD card is present a Pi will always boot from that in preference to USB, network, etc. booting. Pi generally always tries SD first, but if no bootcode.bin is present, it moves to the next device, full bootflow here: https://www.raspberrypi.org/docum...
by mikerr
Wed Oct 10, 2018 7:36 am
Forum: Raspberry Pi OS
Topic: Making Raspbian recoverable without a PC by default?
Replies: 13
Views: 1681

Re: Making Raspbian recoverable without a PC by default?

Without a pc ?

You can use your phone ( the computer you carry in your pocket!)

Easier for Android users, and many have sd slots built in,
You can also create a new pi SD card with my app (see sig)
by mikerr
Sun Oct 07, 2018 7:52 am
Forum: Troubleshooting
Topic: Can't install Chrome OS (FlintOS) on my Pi, Etcher won't create image, just wipes my SD card???
Replies: 7
Views: 1605

Re: Can't install Chrome OS (FlintOS) on my Pi, Etcher won't create image, just wipes my SD card???

Flintos is now fydeOS: Https://fydeOS.com https://translate.googleusercontent.com/translate_c?depth=1&nv=1&rurl=translate.google.co.uk&sl=auto&sp=nmt4&tl=en&u=https://fydeos.com/&xid=17259,15700022,15700122,15700124,15700149,15700186,15700190,15700201,15700214&usg=ALkJrhgBaFPzQ5b3m9k3YgWCg-e3-P5XcA ...
by mikerr
Fri Oct 05, 2018 10:58 pm
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 11408

Re: Diskless booting Zeroes from Windows

Lack of a free and functional NFS server means that the same technique can't work when the host is Windows 10. There is an old windows NFS server here: https://sourceforge.net/projects/winnfsd/ I have my sd-less pi zero accessing that NFS server on windows, and I can see it requesting files but sta...
by mikerr
Thu Oct 04, 2018 2:50 pm
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 11408

Re: Diskless booting Zeroes from Windows

Unfortunately, without being able to build gpioexander, it's not going to be possible for me to modify that, which has brought moving forward to a standstill :( I got a bit further, but I think this is an out of memory problem (on pi3): ../../gcc/defaults.h:126:24: warning: invalid suffix on litera...
by mikerr
Thu Oct 04, 2018 11:25 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Any ideas for Eee PC running Raspberry Pi Desktop?
Replies: 12
Views: 4012

Re: Any ideas for Eee PC running Raspberry Pi Desktop?

Yes much of the strength of the pi (IMO) is it's introduction to linux as a viable desktop OS Once you have linux on a laptop etc, you can do alot of linux (pi) things faster and better. So the real question is : why use a pi in preference to a linux laptop ? or for what is the pi more suited than t...
by mikerr
Thu Oct 04, 2018 10:37 am
Forum: General discussion
Topic: Direct cat5 connection and open wifi?
Replies: 1
Views: 287

Re: Direct cat5 connection and open wifi?

OS X can do it either way:

https://www.mactip.net/share-internet-connection-mac/

You want the first option, share wifi internet through ethernet:

Image
by mikerr
Thu Oct 04, 2018 9:06 am
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 11408

Re: Diskless booting Zeroes from Windows

There are a few different ways of exposing the ethernet gadget to the client OS: RNDIS, CDC ECM or CDC EEM The problem is one of linux / MAC / PC support. RNDIS = Windows only, driver auto loads. CDC ECM = Linux and MAC, but no windows driver (though 3rd party devices seem to use it) CDD EEM = Linux...
by mikerr
Thu Oct 04, 2018 8:29 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Diagnosing piserver issues
Replies: 11
Views: 3014

Re: Diagnosing piserver issues

Could one boot from a USB stick? I tried putting a bootable USB card with the same bootcode.bin on it, but no joy. USB booting without SD requires the same OTP bit flashed as non SD network booting. As detailed at : https://www.raspberrypi.org/documentation/hardware/raspberrypi/bootmodes/msd.md You...
by mikerr
Tue Oct 02, 2018 11:02 am
Forum: Raspberry Pi Desktop for PC and Mac
Topic: Diagnosing piserver issues
Replies: 11
Views: 3014

Re: Diagnosing piserver issues

Not sure how you're running piserver, but note that piserver won't work from the usb booted live OS
It only works when it's installed to HDD.
by mikerr
Tue Oct 02, 2018 10:36 am
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 11408

Re: Diskless booting Zeroes from Windows

Continuing in a "document as I go" fashion: Using GPIO-expander Download & extract the zip file: https://github.com/raspberrypi/usbbootgui/archive/master.zip Point rpiboot at the extracted folder: rpiboot.exe -d d:\pi\usbbootgui-master\gpioexpander\output Waiting for BCM2835/6/7 Sending bootcode.bin...
by mikerr
Mon Oct 01, 2018 9:42 am
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 83
Views: 11408

Re: Diskless booting Zeroes from Windows

OK, documenting steps as I play: 1. Download & install the rpiboot-setup: https://github.com/raspberrypi/usbboot/raw/master/win32/rpiboot_setup.exe This installs: - a USB driver for the Pi - rpiboot.exe - an MSD folder containing boot files bootcode.bin, start.elf 2. Run rpiboot c:\Program Files (x8...
by mikerr
Sat Sep 22, 2018 6:01 pm
Forum: General discussion
Topic: New projects intended for large cards. Keep it small initially
Replies: 5
Views: 612

Re: New projects intended for large cards. Keep it small initially

You can backup a large 128gb card onto a small 8GB card using the "SD copier" included in raspbian - assuming the card is raspbian based.
by mikerr
Sat Sep 22, 2018 5:58 pm
Forum: Other programming languages
Topic: BBC BASIC (Raspbian) source code released
Replies: 13
Views: 4492

Re: BBC BASIC (Raspbian) source code released

I was (past tense) able to "maintain a compiler" but because of the deterioration in my mental faculties (" ... parietal lobe volume loss which may suggest an underlying neurodegenerative process e.g. Alzheimer's disease ") I am no longer, which is one of the main motivations for releasing the sour...
by mikerr
Wed Sep 12, 2018 3:16 pm
Forum: General discussion
Topic: Pi Card Imager - android app prepares SD cards without PC
Replies: 32
Views: 65949

Re: Pi Card Imager - android app prepares SD cards without PC

It is on google play, but that isn't required - the apk is elsewhere as well
e.g. apkfun : https://www.apk4fun.com/apk/89659/
by mikerr
Fri Aug 24, 2018 8:37 pm
Forum: Other projects
Topic: which rack - system is used here!?
Replies: 4
Views: 876

Re: which rack - system is used here!?

"lego mindstorms" is a kit that includes some electronics, the construction parts are "Lego technic".
by mikerr
Thu Aug 23, 2018 4:32 pm
Forum: Networking and servers
Topic: will i get wifi collision with 100 RPI in 3 cubic meter?
Replies: 6
Views: 1082

Re: will i get wifi collision with 100 RPI in 3 cubic meter?

For 100 clients I'd consider using 2-3 AP's on different channels.

Many cheap router/AP's have trouble with large number if devices connected, but I've always found unifi AP's work well.

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