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by sandwich
Thu Jul 15, 2021 7:18 pm
Forum: Gaming
Topic: Hexen broken?
Replies: 2
Views: 371

Hexen broken?

After installing uhexen2 and uhexen2-common on RpiOS-64, I find that I get an error:

Code: Select all

FATAL ERROR: Unable to find a proper Hexen II installation
Additionally I find that when I try to run freedoom, it ignores all keyboard input.
by sandwich
Sun Jul 11, 2021 2:48 am
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

Will NDAs protect Broadcom from having their IP stolen by Chinese hackers and government agents?
Will NDAs help Broadcom increase the popularity of their chips, or make people suspect them of violating other companies patents?
by sandwich
Sun Jul 11, 2021 12:40 am
Forum: General discussion
Topic: Using the Raspberry Pi 4 with 4GB for video editing
Replies: 19
Views: 844

Re: Using the Raspberry Pi 4 with 4GB for video editing

If Shotcut can be installed under RaspiOS64, which is beyond my rudimentary knowledge, the experience could be better. Thanks for the tip. Shotcut isn't currently listed by "apt list". Building it requires a slightly newer Qt than RpiOS offers but that can be remedied by building Qt. Or o...
by sandwich
Sun Jul 11, 2021 12:23 am
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

And culling the current team and getting in a new one would be insane. I agree RISC-V's not quite there yet, but there's no need for a culling. I mean what's stopping you from learning a new platform? Opportunity favors the prepared, as they say. As for the idea that someone stated that Rpi's team ...
by sandwich
Sat Jul 10, 2021 4:23 am
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

jdb wrote:
Fri Jul 09, 2021 9:26 pm
Please provide evidence that Mali is an "open-source friendly" GPU.
jdb wrote:
Fri Jul 09, 2021 9:26 pm
Btw, here's the complete and unredacted architecture specification of the Videocore 4 3D engine, as used on Pi 1 through 3B+: https://docs.broadcom.com/doc/12358545
How much of it applies to the Videocore 6?
by sandwich
Fri Jul 09, 2021 8:09 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

Making a new SoC with capabilities of the current ARM device but with a RISC-V core will takes years Didn't you click on the links I provided? The Allwinner D1 SoC already exists and has the various coprocessors built into it: https://d1.docs.allwinnertech.com/assets/img/image-20210508170105959-162...
by sandwich
Fri Jul 09, 2021 5:02 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

You seem to be misunderstanding the effort involved here. In order to make an SoC, you need the RTL for the cores, plus all the other blocks you might need. So for RISC-V you either copy someone else's RTL (The RISC-V instruction set is OS, not sure about RTL developed that implements them), or dev...
by sandwich
Thu Jul 08, 2021 7:20 pm
Forum: General discussion
Topic: Looking for screen recommendations
Replies: 2
Views: 153

Re: Looking for screen recommendations

Waveshare has some e-Ink displays that are tiny and cheap.
by sandwich
Thu Jul 08, 2021 7:17 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

Correction, the only thing RISC-V gives us is the instruction set! The instruction set is NOT a CPU core! Haven't you kept up with current events? There are now two RISC-V single board computers: Nezha and Beagleboard. https://hackerboards.com/boards/nezha/ https://www.seeedstudio.com/blog/2021/01/...
by sandwich
Thu Jul 08, 2021 7:12 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

jdb wrote:
Wed Jul 07, 2021 10:12 pm
What does that statement have to do with documentation for Videocore?
As an open-source hardware design, RISC-V would presumably be packaged with an open-source GPU, or at least an open-source friendly GPU like Mali.
by sandwich
Wed Jul 07, 2021 10:10 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

jamesh wrote:
Wed Jun 16, 2021 10:35 pm
Eben no longer works for Broadcom, full time CEO of Trading.
If that's the case, hopefully he is not beholden to them any more. Maybe a RISC-V variant of the Pi is possible?
by sandwich
Wed Jul 07, 2021 10:09 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Re: Videocore 6 documentation

If you want more detailed documentation for the SoC you would probably need to sign an NDA with Broadcom: how likely they would be to do that would, I would guess, depend on how many of the chips you wanted to purchase from them Oh, well that's not great. I've always wondered by hardware companies ...
by sandwich
Sat Jul 03, 2021 7:23 pm
Forum: General discussion
Topic: Fastest way to take a screenshot
Replies: 17
Views: 664

Re: Fastest way to take a screenshot

HermannSW wrote:
Fri Jul 02, 2021 8:09 pm
raspi2png always works for me.
I get this:

Code: Select all

$ ./raspi2png 
raspi2png: unable to open display 0
$ ls /dev/shm/
$
Are you using 32-bit or 64-bit Rpi OS?
by sandwich
Thu Jul 01, 2021 7:22 pm
Forum: Off topic discussion
Topic: Pi5 wish list
Replies: 8
Views: 817

Pi5 wish list

Since everyone is letting their wishes and dreams be known I can add mine: I find what's slowing down my system most is the tiny L2 cache firstly, then the flash memory (because it's not a real SSD). The DRAM is fast enough (maximum 4GB/second) but it is always busy replenishing the tiny L2. * If Br...
by sandwich
Thu Jul 01, 2021 6:36 pm
Forum: General discussion
Topic: Fastest way to take a screenshot
Replies: 17
Views: 664

Re: Fastest way to take a screenshot

scruss wrote:
Wed Jun 30, 2021 10:54 pm
raspi2png is quite nice
Have you tried it recently? I just tried it and it gave an error.
by sandwich
Thu Jul 01, 2021 6:30 pm
Forum: General discussion
Topic: Fastest way to take a screenshot
Replies: 17
Views: 664

Re: Fastest way to take a screenshot

Less than 0.09 seconds: pi@raspberrypi400:~ $ time cp /dev/fb0 x I wasn't aware /dev/fb0 could be read directly like that, thanks but as you say it captures the console, not X. It is X that I want to capture. I had actually tried something similar but more cumbersome, namely opening it programmatic...
by sandwich
Wed Jun 30, 2021 6:41 pm
Forum: General discussion
Topic: Fastest way to take a screenshot
Replies: 17
Views: 664

Re: Fastest way to take a screenshot

As mentioned scrot is installed by default will take a screenshot each time the [Print Screen] key is pressed. Oh? There's nothing in the man page about PrtSc. Anyway I don't care about that-- I'm doing this from the command line and I don't have a PrtSc key. However I suppose if I could set up a d...
by sandwich
Wed Jun 30, 2021 4:27 pm
Forum: General discussion
Topic: Fastest way to take a screenshot
Replies: 17
Views: 664

Re: Fastest way to take a screenshot

Thanks that is better -- about 0.325 seconds.
by sandwich
Wed Jun 30, 2021 4:17 pm
Forum: General discussion
Topic: Raspberry pi keeps overheating on me
Replies: 51
Views: 2440

Re: Raspberry pi keeps overheating on me

cleverca22 wrote:
Tue Apr 20, 2021 5:22 am

Code: Select all

vcdbg log msg
vcdbg log assert
these commands will attempt to extract logs from the firmware
My aarch64 Rpi OS installation, which is 10.9 but updated quite recently, doesn't have vcdbg. What package is it in?
by sandwich
Wed Jun 30, 2021 4:11 pm
Forum: General discussion
Topic: h265 encoding speed
Replies: 3
Views: 270

Re: h265 encoding speed

cleverca22 wrote:
Tue May 11, 2021 11:15 pm
the pi4 only has h265 decode accel
I find that h265 (hevc) playback is also super-slow.
For instance, try these:
https://jell.yfish.us/
by sandwich
Wed Jun 30, 2021 4:02 pm
Forum: General discussion
Topic: Fastest way to take a screenshot
Replies: 17
Views: 664

Fastest way to take a screenshot

Hi folks,
Is there a faster way to take a screenshot of the entire screen than xwd? I've found that it takes about half a second to capture an entire 1920x1080 screen.
Try it yourself:

Code: Select all

time xwd -out a.xwd -screen -silent -root
Any ideas?
by sandwich
Wed Jun 16, 2021 6:55 pm
Forum: General discussion
Topic: Videocore 6 documentation
Replies: 40
Views: 2021

Videocore 6 documentation

Hello,
Is there any publicly available Videocore 6 documentation, such as for programming it at the lowest level?
Thanks.
by sandwich
Mon Jun 14, 2021 6:48 pm
Forum: Other projects
Topic: How to mine crypto on RPi 4?
Replies: 6
Views: 4993

Re: How to mine crypto on RPi 4?

32-bit Raspbian CPU mining results of Bitcoin is a bit faster than 64-bit: [2021-06-14 04:01:24] thread 2: 61184316 hashes, 1019 khash/s [2021-06-14 04:01:24] thread 0: 60983494 hashes, 1015 khash/s [2021-06-14 04:01:24] thread 1: 61163128 hashes, 1017 khash/s [2021-06-14 04:01:25] thread 3: 6107171...
by sandwich
Mon Jun 14, 2021 3:31 pm
Forum: General discussion
Topic: How viable is RPI 4B as a home PC?
Replies: 34
Views: 2023

Re: How viable is RPI 4B as a home PC?

Hi everyone. I need to replace my parents home PC, and it seems unnecessary to spend ±300$ on a PC when a 35$ RPI could do the job (?). I've been using the Rpi4 8GB for 11 months. It's a bit slow but perfectly useable. It's perhaps half the speed of a cheap Pentium Intel NUC. It has its pros and co...
by sandwich
Sun Jun 13, 2021 3:05 pm
Forum: Other projects
Topic: How to mine crypto on RPi 4?
Replies: 6
Views: 4993

Re: How to mine crypto on RPi 4?

B70V wrote:
Fri Mar 26, 2021 9:37 pm

I have followed various tutorials, and they all seem to use cpuminer-multi which does not work for me, I just get a timeout error.
Looking at the source code for that, I notice that the ARM assembly language file is empty.
https://github.com/lucasjones/cpuminer-multi

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