Yeah, the higher-level code should work without issues on the Pi
considering it has an MMU and FPU. Converting the ASM to ARM-style ASM
will be the key and I'm not qualified to make any assumptions there.
Are there any fundamental issues with porting the existing ASM code in
ROS to an ARMv6Z architecture?
Maya
(2012/01/11 14:01), Igor Paliychuk wrote:
Looks like Raspberry Pi will became very popular and it's a big chance
for promoting ReactOS(if there will be an effort to port it to
ARMv6Z). I'm not very familiar with multiplatform coding so correct me
if i'm wrong: the main idea in porting ReactOS to ARM is replacing ASM
code into C in parts where it's possible and use ARM ASM where it's
not possible.
So switching between different ARM versions should be mainly just
matter of ASM syntax. And this is not so hard (afaik) as converting
ASM to C.
2012/1/11, Maya Posch<m...@nyanko.ws>:
If the Wikipedia page on ARM 11 is to be believed
(http://en.wikipedia.org/wiki/ARM11), then even the original Nvidia
Tegra uses this architecture, but aside from the Raspberry Pi I am not
aware of any ARM11-based platform out there which might be useful for
ROS, unless someone wants to run it on a smartphone.
I think at this point one has to look at the features provided by the
ARMv6Z architecture and see whether it suffices for ROS's ARM port. If
it's too much of a bother to work around issues, then don't use it.
Maya
(2012/01/11 13:41), Ged Murphy wrote:
I thought Windows supported v5 -- v7?
Anyway, I realise that the Raspberry Pi uses the dated v6
architecture, but the killer thing here is the $25 price tag.
There's also the BeagleBoard which is slightly cheaper than the
PandaBoard, and also uses the A8/v7 chip. But at $149 I really don't
see it shifting the same number of units as the raspberry boards. I
already know quite a lot of people who are wanting to personally buy
quite a few for fun and potential uses.
Maybe the development effort for a v6 port isn't worth it, but I think
it's worth keeping an eye on the sales figures because the demand for
these things seems huge. Potentially, that's a large number of
developers which might be attracted to reactos.
Ged
*From:*ros-dev-boun...@reactos.org
[mailto:ros-dev-boun...@reactos.org] *On Behalf Of *Alex Ionescu
*Sent:* 11 January 2012 11:20
*To:* ReactOS Development List
*Subject:* Re: [ros-dev] Rasberry Pi
It's a generation-lagging ARM11 -- Windows and iOS don't support these
kind of chips anymore (called ARMv6) because of major lacking
functionality. The ARMv6K (which I'm not sure the Pi uses) is probably
the minimum you'd want to use, and I know the ROS ARM port was
retargeted to ARMv7 which has been out for almost 3-4 years now.
The PandaBoard, which is 179$, so definitely more expensive, is a much
better platform for such a port -- it's an A9/v7 (successor to A8/v7,
successor to ARMv6K, successor to ARM6...) and has dual-core, 1GB of
RAM, a GPU, a DSP, and more... still a bargain for 179$ if you ask me
though.
Best regards,
Alex Ionescu
On Wed, Jan 11, 2012 at 11:18 AM, Ged Murphy
<gedmurphy.mailli...@gmail.com<mailto:gedmurphy.mailli...@gmail.com>>
wrote:
It looks like the model B boards are now in manufacture.
http://www.raspberrypi.org/archives/509
There are only 10k being made being made in this batch and demand is
really high, so I doubt they'll last longer than a few minutes.
With only 256MB RAM available, I doubt Windows 8 will ever run on it
although Windows Embedded Compact 7 might.
I know the reactos arm port is still a way off, but this could be a
golden opportunity for reactos.
At $25 per computer, they're gonna sell hundreds of thousands of these
things and most buyers will be enthusiasts/developers.
Ged.
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