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by teh_orph
Mon Feb 20, 2012 1:03 pm
Forum: General discussion
Topic: Lowest cost com port
Replies: 32
Views: 8808

Re: Lowest cost com port

<r>Would this do (same chip)?<br/> <br/> <URL url="http://www.play.com/PC/PCs/4-/.....d:22896719">http://www.play.com/PC/PCs/4-/.....d:22896719</URL><br/> <br/> (also I always thought TTL was 5v, but 3.3v is mentioned - any help?)<br/> <br/> Finally, there's six pins on this thing. Would only TXD, R...
by teh_orph
Mon Feb 20, 2012 12:57 pm
Forum: General discussion
Topic: Reducing power consumption
Replies: 11
Views: 3550

Re: Reducing power consumption

<t>ARM and other vendors often make a point of talking about how much power it costs to access main memory. So, if your application suits it,<br/> <br/> - buy the smaller memory model ('A') as less memory will need to be refreshed<br/> - run as few background processes as possible - ideally just you...
by teh_orph
Mon Feb 20, 2012 12:20 pm
Forum: General discussion
Topic: Lowest cost com port
Replies: 32
Views: 8808

Re: Lowest cost com port

Hi guys,

slight thread grave-dig here: what's the conclusion on kit to get?

I'd like to connect to the main UART with a USB->serial adaptor but of course don't want to fry it! Was that Amazon link sufficient?

Cheers
by teh_orph
Sat Feb 18, 2012 12:15 pm
Forum: General discussion
Topic: Official image and QEMU?
Replies: 106
Views: 54125

Re: Official image and QEMU?

<t>With qemu 0.12.x the ARM 1176 and 1136 models had faulty MMU implementations and would not boot the system properly. I had much better success with the arm11mpcore option. Those bugs might have been fixed in the latest version though.<br/> <br/> (also if you're using the versatilepb machine type ...
by teh_orph
Sat Feb 18, 2012 11:53 am
Forum: General discussion
Topic: the rage is coming
Replies: 9
Views: 1831

Re: the rage is coming

<t>a10112 said: <br/> <br/> <br/> I don't know exactly how many people are after the RPi but I can say that there will most likely be a huge number of people who didn't get in on the initial release... and they will rage.<br/> <br/> <br/> <br/> Yeah I'll be very disappointed if I don't get one, so I...
by teh_orph
Sat Feb 18, 2012 11:51 am
Forum: General discussion
Topic: Official image and QEMU?
Replies: 106
Views: 54125

Re: Official image and QEMU?

<t>Grumpyoldgit said: <br/> <br/> <br/> Reading through these posts there is an assumption that the reader has a familiarity with Qemu and has gone through various processes first. Is it possible to have a real idiot guide, starting from the point where Qemu has just been installed fresh?<br/> <br/>...
by teh_orph
Sat Feb 18, 2012 12:57 am
Forum: General discussion
Topic: Root filesystem available to download
Replies: 77
Views: 16358

Re: Root filesystem available to download

Cheers Liam.
The torrent has finished now (quicker than expect) and I see there's that partition at the front with the extra files.

Good work guys...
by teh_orph
Sat Feb 18, 2012 12:17 am
Forum: General discussion
Topic: Root filesystem available to download
Replies: 77
Views: 16358

Re: Root filesystem available to download

Hi Liz,

I'm still downloading so can't check - can I ask: does this come with the GPU blobs etc required to boot the machine or will they come in later downloads?

Cheers!
by teh_orph
Sat Feb 18, 2012 12:16 am
Forum: General discussion
Topic: Official image and QEMU?
Replies: 106
Views: 54125

Re: Official image and QEMU?

<t>I've been getting the rpi kernel working in qemu for the last few weeks and I'm gonna say in general, 'no' <br/> <br/> The addresses of the hardware devices are unique to the rpi, so although some things do come up you'll need to modify qemu to put the virtual hardware in the places that the kern...
by teh_orph
Mon Feb 13, 2012 11:54 am
Forum: General discussion
Topic: config.txt
Replies: 172
Views: 74319

Re: config.txt

Yes that's a good point. I do expect to be endless rebuilding the kernel though...so if that can be sent over serial too that would be *amazing*! (although pretty slow too)
by teh_orph
Mon Feb 13, 2012 10:26 am
Forum: General discussion
Topic: config.txt
Replies: 172
Views: 74319

Re: config.txt

<t>Dom, this sounds great stuff.<br/> <br/> Is there any chance of specifying any of these options at boot-time via the keyboard or even over serial? I could see the SD card slot getting worn out quickly when tweaking these display values or (what I'll be doing!) configuring the kernel command line ...
by teh_orph
Thu Feb 09, 2012 2:06 pm
Forum: General discussion
Topic: Questions about Raspi afte reading Wiki about video drivers, kernels, repositories, compiling...
Replies: 7
Views: 13549

Re: Questions about Raspi afte reading Wiki about video drivers, kernels, repositories, compiling...

I too am worried by this binary blob.

Can we find out from someone with said blob, to see if it is tied to a certain kernel version? I'd like to compile the kernel with a different ABI - is this possible or will we need to get someone to rebuild it for us?
by teh_orph
Wed Feb 08, 2012 4:28 pm
Forum: General discussion
Topic: Qemu options
Replies: 8
Views: 1852

Re: Qemu options

Yes the instructions on that linked site include settings options for hardware that is emulated by qemu, eg a SCSI controller. The rpi configuration file only includes what's necessary for the rpi hardware.
by teh_orph
Wed Feb 08, 2012 4:10 pm
Forum: General discussion
Topic: Qemu options
Replies: 8
Views: 1852

Re: Qemu options

So can you confirm - is the linux kernel actually starting, or are you connecting to the qemu vnc output? (ie the vnc server provided by qemu, *not* by the emulated OS)
by teh_orph
Wed Feb 08, 2012 3:27 pm
Forum: General discussion
Topic: Qemu options
Replies: 8
Views: 1852

Re: Qemu options

<t>I've been running the rpi git kernel in qemu (well, the qemu provided with the android 4.0 SDK) and have had decent success with it. Much of it was done with GDB and IDA Pro though.<br/> <br/> How far exactly have you got? It was quite a lot of work to even get the kernel to start - I wouldn't ex...
by teh_orph
Tue Feb 07, 2012 11:10 am
Forum: General discussion
Topic: New post on the front page: a date that'll interest you, and a datasheet that will too.
Replies: 127
Views: 18369

Re: New post on the front page: a date that'll interest you, and a datasheet that will too.

Liz, any chance of some more web server capacity around that date? I'd imagine the site will get hammered and go down...never fun when your credit card is out!
by teh_orph
Fri Feb 03, 2012 11:47 am
Forum: General discussion
Topic: Design choices behind the RPi
Replies: 35
Views: 6566

Re: Design choices behind the RPi

<t>jojopi said: <br/> <br/> <br/> I would not expect any difference between x86 and Thumb-2 to be very significant for real workloads.<br/> <br/> <br/> For sure. I've been working with ARM for years and it's certainly not as compact as people would believe versus x86. Sure Thumb-2 is a good deal mor...
by teh_orph
Tue Jan 31, 2012 6:21 pm
Forum: General discussion
Topic: Console output after GPU handover?
Replies: 9
Views: 2114

Re: Console output after GPU handover?

Sweet, thanks for the info!

Now that I know what I'm looking for I see there's existing threads about this UART/serial stuff. Thanks!
by teh_orph
Tue Jan 31, 2012 1:55 pm
Forum: General discussion
Topic: Console output after GPU handover?
Replies: 9
Views: 2114

Re: Console output after GPU handover?

<t>Cheers guys.<br/> <br/> Yeah I figure that framebuffer stuff would be a no-go at an early stage, that's why I was hoping for some kind of already-on character display!<br/> <br/> Looking through the Rpi wiki page which discusses additional hardware it mentions that console output comes out via th...
by teh_orph
Tue Jan 31, 2012 11:14 am
Forum: General discussion
Topic: Console output after GPU handover?
Replies: 9
Views: 2114

Re: Console output after GPU handover?

Surely someone has turned one of these things on before with a screen plugged in...;-)
by teh_orph
Mon Jan 30, 2012 2:20 pm
Forum: General discussion
Topic: Console output after GPU handover?
Replies: 9
Views: 2114

Re: Console output after GPU handover?

<t>Hi there,<br/> <br/> long time lurker, first time poster.<br/> <br/> I have a lot of embedded and ARMv5/ARMv7 experience and I'm tempted once I get my Pi to bring up an OS on it (that's not Linux).<br/> <br/> However my #1 question would be: is there any kind of (character-based) display that is ...

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