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by Chromatix
Thu Jul 12, 2012 3:39 am
Forum: RISCOS
Topic: RISC OS on Raspberry Pi
Replies: 356
Views: 92667

Re: RISC OS on Raspberry Pi

Under RiscOS, it seems it's safe to assume that the Escape key does what it's supposed to. :o
by Chromatix
Thu Jul 12, 2012 3:30 am
Forum: RISCOS
Topic: When and if not where?
Replies: 22
Views: 5339

Re: When and if not where?

This one: http://t.co/hKrnY4KZ - to which you have to add *FX 20,1 otherwise the @ character won't redefine. It runs perfectly fine on a real RiscPC if you insert WAIT commands in the loops (for vsync), otherwise it is too fast (like running games written for 8086 on a Pentium). I refactored the loo...
by Chromatix
Tue Jul 10, 2012 4:38 am
Forum: Off topic discussion
Topic: Parcel force epic fail!
Replies: 29
Views: 3785

Re: Parcel force epic fail!

In Helsinki: Couriers seem to have no trouble delivering to an office building with a reception desk. It probably helps that they can usually offload several packages at once during one trip. So if you have an urgent and valuable package to send from one business to another, they can do a decent job...
by Chromatix
Tue Jul 10, 2012 2:59 am
Forum: RISCOS
Topic: When and if not where?
Replies: 22
Views: 5339

Re: When and if not where?

I got the latest version running today. It's good to see the old familiar desktop - or something closely resembling it - on something that I don't have to plug an unreliable serial ball mouse into to use. I note there are still a number of hardware support wrinkles to iron out - the sound and the ha...
by Chromatix
Sat Jun 30, 2012 7:18 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

Okay, now I *really* want oprofile. I just happened to look at top when typing, and nearly all the CPU time was being used by Xorg, not by Abiword itself. In my experience this usually has to do with pixman, but it will be nearly impossible to determine exactly what's going on without a decent profi...
by Chromatix
Sat Jun 30, 2012 4:01 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

I'm getting more detailed information now which says that *some* forms of VCVT are already in VFPv2. This is vexing, as the differences between the forms that are allowed and the ones that aren't are not revealed by the above command. I'm still looking at this, but double-checking the flags is a goo...
by Chromatix
Sat Jun 30, 2012 3:31 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

Well, both oprofile and valgrind are missing in action. I found time to do a different kind of analysis though - looking at the selection of instructions used. My hunch turns out to be correct. objdump -d /usr/lib/arm-linux-gnueabihf/libabiword-2.9.so | cut -s -f3 | sort -u | less This command lists...
by Chromatix
Thu Jun 28, 2012 7:55 am
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

I retested using Blackbox on both distros and videoed the results:

http://youtu.be/3Sfk2rT2KzI
http://youtu.be/1UbnsKUVA5E

Note that Raspbian is showing some graphical artefacts as well as being much slower. I still need to investigate using a profiler.
by Chromatix
Tue Jun 26, 2012 2:20 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

The most explainable difference might be that I'm using LXDE on both Debian and Raspbian, but Blackbox on Gentoo. Does LXDE use a compositor?

If that's not it, I'll have to poke at it with a profiler.
by Chromatix
Mon Jun 25, 2012 10:15 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

Well, the usual maths-heavy suspects (eg. XaoS) are obviously slow on Debian, as a direct consequence of not using the FPU. XaoS copes relatively well in autopilot mode, but it clearly has less horsepower to work with than on a properly optimised system. Abiword just surprised me a lot when I tried ...
by Chromatix
Mon Jun 25, 2012 9:47 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

Okay, after spending quite a lot of time getting Raspbian set up, a preliminary test suggests the situation is little improved over plain Debian. Specifically, it does not keep up with my typing when given a trivial couple of sentences to process. There are another couple of nasty bugs visible, but ...
by Chromatix
Sun Jun 24, 2012 5:40 pm
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Re: Consequences of softfloat

I didn't get around to trying Raspbian yet, but I was able to type and edit a thousand-word essay on my Gentoo version, after rebuilding it with spellchecking (etc.) support. It's still slow and clunky in places, but it worked sufficiently well to not be totally embarrassing, and in particular it st...
by Chromatix
Sun Jun 24, 2012 9:50 am
Forum: Debian
Topic: Strange behavior on keyboard
Replies: 11
Views: 2080

Re: Strange behavior on keyboard

I find it hard to believe that power supply problems would cause a modern, high quality but minimal frills keyboard to malfunction in the ways I've seen. My initial setup was with the keyboard and mouse connected to the "console" ports on my DVI KVM switch. This means that they are shared with sever...
by Chromatix
Sun Jun 24, 2012 9:35 am
Forum: Debian
Topic: Consequences of softfloat
Replies: 20
Views: 3673

Consequences of softfloat

I've had an R-Pi running well enough to be able to try several distros confidently, and currently it is shamefully clear that Debian is *far* too slow in comparison to most. A direct comparison between Gentoo (running with hardfloat) and Debian (softfloat) can be made using Abiword. The Windows vers...
by Chromatix
Tue Jun 12, 2012 10:04 pm
Forum: General discussion
Topic: Mhz
Replies: 24
Views: 1837

Re: Mhz

I just installed Abiword on one of my other Linux machines (my R-Pi is a bit busy right now with bringing Gentoo up to date). It's part of the GNOME Office "suite" along with Gnumeric (spreadsheet), Evolution (email etc) and a few others. No verdict yet on how lightweight it is - even my nettop is a...
by Chromatix
Sun Jun 10, 2012 5:54 pm
Forum: General discussion
Topic: How to recover SD Card
Replies: 10
Views: 8389

Re: How to recover SD Card

The camera should have a card formatting utility built into it, too. Some are better than others, but it's worth a try.
by Chromatix
Sun Jun 10, 2012 4:35 pm
Forum: General discussion
Topic: Class 10 SD cards on the production boards
Replies: 81
Views: 26617

Re: Class 10 SD cards on the production boards

Alfadaz wrote:Have you tried installing the Raspbmc build on that problem card?
It won't even boot to the test screen which requires only the firmware files (no kernel). Dom says that a complete lack of OK LED activity means that even the first-stage ROM (which cannot be reflashed) is not bringing the card up.
by Chromatix
Sat Jun 09, 2012 11:28 pm
Forum: General discussion
Topic: Request for Failing sdcards
Replies: 89
Views: 34485

Re: Request for Failing sdcards

Yes, still nothing there (using FAT32). I did the same (albeit with FAT16) with an ancient 64MB card that was spare, and that came up fine. I might use that card to boot Linux from a USB drive so that I can performance-test cards through the internal slot. The power meter says about 0.6W for the fai...
by Chromatix
Sat Jun 09, 2012 8:22 pm
Forum: General discussion
Topic: Class 10 SD cards on the production boards
Replies: 81
Views: 26617

Re: Class 10 SD cards on the production boards

That was roughly the procedure I followed for the four cards at bottom left, although I took a shortcut (since I have other Linux machines already) and I was working with a Fedora Remix image. Among those four cards are a 45MB/s SanDisk Extreme and a 30MB/s SanDisk Ultra. The card that isn't working...
by Chromatix
Sat Jun 09, 2012 12:56 pm
Forum: General discussion
Topic: Mhz
Replies: 24
Views: 1837

Re: Mhz

Questions like this make me weep. Twenty years ago, nearly every (home or office) computer had less than 100MHz in the CPU and at most 16MB of RAM. Hard disks were measured in hundreds of MB if you were lucky. And what were they primarily used for? Word processing. Well, and spreadsheets and the occ...
by Chromatix
Sat Jun 09, 2012 2:19 am
Forum: General discussion
Topic: Class 10 SD cards on the production boards
Replies: 81
Views: 26617

Re: Class 10 SD cards on the production boards

And here are the results! http://dl.dropbox.com/u/60111136/IMG_0137.JPG These 22 cards are split into three groups in the photo, according to how much effort was needed to make them work in the R-Pi: 1) The largest group, at top and right, works correctly with the images on the main R-Pi download pa...
by Chromatix
Sat Jun 09, 2012 1:59 am
Forum: General discussion
Topic: Request for Failing sdcards
Replies: 89
Views: 34485

Re: Request for Failing sdcards

@Chromatix Any flickering of OK light at all? I recorded a video and went through it frame by frame. Not even a flicker. In an equivalent video with a known-good card, there are a couple of brief flickers clearly visible before the thing really lights up. So it's not just my eyes. The good news is ...
by Chromatix
Fri Jun 08, 2012 9:39 pm
Forum: General discussion
Topic: Request for Failing sdcards
Replies: 89
Views: 34485

Re: Request for Failing sdcards

I don't think so. I'll look more closely later when I've gone through all the other cards.
by Chromatix
Fri Jun 08, 2012 7:32 pm
Forum: General discussion
Topic: Request for Failing sdcards
Replies: 89
Views: 34485

Re: Request for Failing sdcards

I think one of my cards is refusing even to deal with the bootloader, not getting into the Linux kernel. I'll need to investigate that one more thoroughly myself, but that might be a good candidate for testing. It's a SanDisk Extreme 4GB marked for 30MB/s. So far all the other cards are behaving the...
by Chromatix
Fri Jun 08, 2012 4:57 pm
Forum: General discussion
Topic: Class 10 SD cards on the production boards
Replies: 81
Views: 26617

Re: Class 10 SD cards on the production boards

Yes, most likely Raspbmc has newer firmware and kernel stuff like what I am now testing with. So far I've got several cards which work fine with both old and new versions, two that work only with the new version, and one that doesn't work with either of them. I've still got a huge pile to go through...

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