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by jahboater
Sat Feb 16, 2019 8:06 pm
Forum: Beginners
Topic: How can I reinstall Raspbien Lite?
Replies: 7
Views: 130

Re: How can I reinstall Raspbien Lite?

Spode wrote:
Sat Feb 16, 2019 7:51 pm
I know I could always just reformat my microSD card and reinstall the operating system via Win32DiskImager,
Do not reformat your microSD card - it is 100% pointless and just wears out the card!

Win32DiskImager or Etcher will overwrite everything on the disk including the partition table.
by jahboater
Sat Feb 16, 2019 6:12 pm
Forum: Beginners
Topic: Raspberry 3 B needs a cooling system?
Replies: 15
Views: 5741

Re: Raspberry 3 B needs a cooling system?

+1
That looks like it might be 3M thermal tape which is a good thing.
Make sure the fins are aligned with the airflow.
Best is with the board on edge, in which case the fins should be up/down.
by jahboater
Fri Feb 15, 2019 3:10 pm
Forum: Raspbian
Topic: Why is the Raspbian desktop experience so slow?
Replies: 26
Views: 688

Re: Why is the Raspbian desktop experience so slow?

feelslikeautumn wrote:
Fri Feb 15, 2019 1:51 pm
The slowness on the pi doesn't 'feel' like it is due to excessive memory swapping, but I have nothing to back that up and I'm probably wrong.
Perhaps run "vmstat 10" while doing some web browsing. Also "free -h" may help.

By default Raspbian only has 100MB of swap space.
by jahboater
Fri Feb 15, 2019 3:00 pm
Forum: General discussion
Topic: max size of SD card
Replies: 3
Views: 157

Re: max size of SD card

I routinely use 128GB cards now because the (Sandisk ones anyway) claim extra speed. 400GB cards are available:- https://www.amazon.co.uk/SanDisk-microSDXC-Memory-Adapter-Performance/dp/B073JYC4XM/ref=sr_1_2?ie=UTF8&qid=1550242559&sr=8-2&keywords=A1+class+sandisk+sd+card and I would very confident t...
by jahboater
Fri Feb 15, 2019 8:55 am
Forum: Off topic discussion
Topic: Is ARM doomed?
Replies: 15
Views: 398

Re: Is ARM doomed?

Correct me if I'm wrong, but doesn't RISC run on ARM? Edit: Seems to be a processor design maybe I am wrong Personally, I refuse to use RISC. Tried RISC OS once, took half an hour to figure out how to shut it down. ARM once stood for Advanced Risc Machine. The Pi's have RISC CPU's (slightly more RI...
by jahboater
Thu Feb 14, 2019 7:38 pm
Forum: Beginners
Topic: How to install the OS on Raspberry Pi 3 Model B+
Replies: 28
Views: 461

Re: How to install the OS on Raspberry Pi 3 Model B+

JamesH, Sorry to go on about boring old dd :( I realize the to NOOBs or not NOOBs decision is more important. The notes say: dd bs=4M if=2018-11-13-raspbian-stretch.img of=/dev/sdX conv=fsync Please note that block size set to 4M will work most of the time. If not, try 1M, although this will take co...
by jahboater
Thu Feb 14, 2019 7:24 pm
Forum: Beginners
Topic: How to install the OS on Raspberry Pi 3 Model B+
Replies: 28
Views: 461

Re: How to install the OS on Raspberry Pi 3 Model B+

caveat: I've never actually used Etcher. Etcher does seem to be the way for people to Install Raspbian on a card or USB device now. Would it be worth contacting the people who make it and seeing if they can add a "Download and install Raspbian (or other Pi OS)" option? That would pretty much make i...
by jahboater
Thu Feb 14, 2019 4:33 pm
Forum: Beginners
Topic: How to install the OS on Raspberry Pi 3 Model B+
Replies: 28
Views: 461

Re: How to install the OS on Raspberry Pi 3 Model B+

Removing the choice NOOBS vs etcher will simplify things. I think a simple explanation of the image mechanism might help. (The OS is actually "installed" by the RPF engineers. They then make a copy of the entire disk, and zip it up. The user downloads the zipped image, unzips it, and copies it to th...
by jahboater
Wed Feb 13, 2019 9:08 pm
Forum: Advanced users
Topic: getting a better heatsink
Replies: 8
Views: 246

Re: getting a better heatsink

well thank you for writting all that, really. I did not have success finding a heatsink 15mm,15mm,3inch, for my Pi A+ which gets really hot with "ETAPRIME'S" overclock which is 1550mhz. Please help me research for one so I can buy it and glue to the SOC of my PI A+. Thats a huge overclock. Try runn...
by jahboater
Wed Feb 13, 2019 9:06 pm
Forum: General discussion
Topic: sd card characteristics
Replies: 11
Views: 292

Re: sd card characteristics

I don't need a large card. I'm running many Pis on 8GB cards, and those simply don't exist in the A1/A2 space. It looks like nowadays 16GB cards are cheaper than 8GB cards ..... https://www.amazon.co.uk/SanDisk-microSDXC-Memory-Adapter-Performance/dp/B073K14CVB/ref=sr_1_2?ie=UTF8&qid=1550086020&sr=...
by jahboater
Wed Feb 13, 2019 7:25 pm
Forum: General discussion
Topic: sd card characteristics
Replies: 11
Views: 292

Re: sd card characteristics

+1 A1 and A2 class cards are designed for the purpose (random 4k block I/O). Older SD card types are intended for use in camera's and other media devices. https://www.sdcard.org/developers/overview/application/index.html Sandisk A1 or A2 class cards work well. The larger ones are slightly faster. ht...
by jahboater
Wed Feb 13, 2019 7:17 pm
Forum: Advanced users
Topic: getting a better heatsink
Replies: 8
Views: 246

Re: getting a better heatsink

jahboater, what you posted is most impressive. Is there a way to go taller than 15mm? I don't know, sorry. where could I buy a heatsink by measure? Not sure what you mean? Do you mean a custom made heat sink? Search around with google - north bridge heat sinks might fit. Seriously, I would run a re...
by jahboater
Wed Feb 13, 2019 12:21 pm
Forum: C/C++
Topic: [C] compatibility data types 32-64 bit?
Replies: 17
Views: 278

Re: [C] compatibility data types 32-64 bit?

Some of them are still in use. Not that I work with them nowadays. It's been over ten years since I used the 36 bit systems, although towards the end the huge mainframes were replaced with software and hardware emulation on a series of small Unix boxes. One ran the main code, another handled tape d...
by jahboater
Wed Feb 13, 2019 11:30 am
Forum: C/C++
Topic: [C] compatibility data types 32-64 bit?
Replies: 17
Views: 278

Re: [C] compatibility data types 32-64 bit?

I have worked on a system with 6 or 9 bit bytes and 18 or 36 bit words. So have I (Honeywell mainframes, Control-data super computers, DEC 10). But I don't see the need to worry about it now, probably only of interest if you work in a museum. The IEEE (POSIX) in 2008 fixed CHAR_BIT at 8, and thats ...
by jahboater
Wed Feb 13, 2019 11:24 am
Forum: C/C++
Topic: [C] compatibility data types 32-64 bit?
Replies: 17
Views: 278

Re: [C] compatibility data types 32-64 bit?

Oh boy. Personally I hate to see word, dword, qword, etc defined. Traditionally "word size" referred to the width of the registers and memory of the machine itself. Could be 4, 8, 16, 32, 64, 128 bits and there have been a variety of machines with word sizes between those. In short "word" etc don't...
by jahboater
Wed Feb 13, 2019 9:54 am
Forum: C/C++
Topic: [C] compatibility data types 32-64 bit?
Replies: 17
Views: 278

Re: [C] compatibility data types 32-64 bit?

Its a little messy. Its better to include "inttypes.h" (which itself includes stdint.h) inttypes.h adds some more useful stuff such as the printf formats. Hi to all, I have little doubt about compatibility between 32/64 bit OSs..... If you use the exact width types people have posted above, there ar...
by jahboater
Wed Feb 13, 2019 7:58 am
Forum: Advanced users
Topic: getting a better heatsink
Replies: 8
Views: 246

Re: getting a better heatsink

Agreed, yes. 53C is nothing to worry about. You can quickly check if throttling has occurred at some point with: vcgencmd get_throttled If the result is zero (0x0), all is well. Of course there is no harm fitting a heat sink anyway. For stick-on heat sinks that should fit anything, the Adafruit ones...
by jahboater
Tue Feb 12, 2019 11:47 pm
Forum: Advanced users
Topic: getting a better heatsink
Replies: 8
Views: 246

Re: getting a better heatsink

I'd like to know if you guys could help me find a tall but 14mm by 14mm heatsink for the raspberry pi 3 a+Mine is crawling to the 53c's, so I am interested on getting a cooler master like heatsink for my raspberry pi. This is the best heat sink I know of for the Pi3B+ https://www.amazon.co.uk/Kinta...
by jahboater
Tue Feb 12, 2019 6:29 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 1373
Views: 50955

Re: Why Avoid BASIC on RPi?

Amazingly one can still get recently maintained BCPL from Martin Richards. Which is usable on the Raspberry Pi apparently: I installed BCPL on an Amdahl mainframe over 35 years ago and at the time I was impressed that it "just worked" - because it was a binary executable and IBM hardware had remain...
by jahboater
Tue Feb 12, 2019 5:42 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 1373
Views: 50955

Re: Why Avoid BASIC on RPi?

ejolson wrote:
Tue Feb 12, 2019 3:57 pm
Does D have a gosub-like setjmp similar to C?
I believe it is possible but frowned upon!

I thought gosub was a normal function call in Basic?
by jahboater
Tue Feb 12, 2019 8:30 am
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 1373
Views: 50955

Re: Why Avoid BASIC on RPi?

While APL led to A and then the A+ programming language, BCPL led to B, C and then the D programming language. As a teacher I asked myself, what in the grading scale comes after D? CPL (Combined Programming Language) led to BCPL (Basic CPL). They called the first successor to C, C++ to avoid the ch...
by jahboater
Tue Feb 12, 2019 8:24 am
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 34
Views: 1254

Re: Next raspberry ethernet?

So, none of them hit 1000mbits/s then. As I said. There is always protocol overhead and gaps between packets. Analogous to the way you never get 1GB of free disk space on a 1GB disk. Incidentally, the Pi's "feel" faster when I use them over the network compared to the GigE Odroid C2 (and Gentoo64 o...
by jahboater
Mon Feb 11, 2019 6:51 pm
Forum: Off topic discussion
Topic: Why Avoid BASIC on RPi?
Replies: 1373
Views: 50955

Re: Why Avoid BASIC on RPi?

GCC version 9 will include D so it should be available on everything including RISC-V.

Current status:
https://gcc.gnu.org/ml/gcc/2019-02/msg00028.html
by jahboater
Mon Feb 11, 2019 5:09 pm
Forum: General discussion
Topic: We've opened a shop!
Replies: 61
Views: 1894

Re: We've opened a shop!

Another review ...
(cooler than the Apple store!)

https://techcrunch.com/2019/02/07/the-r ... ple-store/
by jahboater
Mon Feb 11, 2019 7:41 am
Forum: General discussion
Topic: Next raspberry ethernet?
Replies: 34
Views: 1254

Re: Next raspberry ethernet?

I use this fast and well supported 64-bit distro by Sakaki:

https://github.com/sakaki-/gentoo-on-rpi3-64bit

It works perfectly on the Pi3B+

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