[Vm-dev] Raspberry Pi Scratch with GPIO

[Clément Bera]

Tim,

Is the default virtual machine shipped with scratch the Cog-ARM version or
the stack interpreter ? Is it a spur or non spur VM ?

I know you made it work but I wonder if it's in production or not.


2015-12-17 5:52 GMT+01:00 tim Rowledge <tim at rowledge.org>:

>
>
> > On 16-12-2015, at 7:31 PM, Ben Coman <btc at openInWorld.com> wrote:
> >
> >
> > I was just looking to show a friend at work programming for kids on
> > the Raspberry Pi, away from my usual Smalltalk activities at home, and
> > was surprised to find an article mentioning Scratch with GPIO and our
> > very own Tim & Eliot, which I thought I'd share
> >
> >
> https://www.raspberrypi.org/blog/a-new-version-of-scratch-for-raspberry-pi-now-with-added-gpio/
>
> It’s been fun for the last couple of years to be full-time working on
> something unequivocally good, rather than merely profitable. A couple of
> million kids apparently use it every week at school and home. We started
> off with a really slow system that got people interested but annoyed them
> after a short while of trying to cope with grindingly slow response; after
> some reworking of a fair bit of really bad code it got fast enough to keep
> kids interested. Then after rewriting a lot more, it was able to run on the
> newer VMs, which made it a bit faster still. Then Eliot & I worked on the
> Cog and got a bit faster still. The Pi2 came out, which also helped.
>
> All in all, for a big Scratch project we chose as a bellwether, we went
> from less than 1fps of PacMan to better than 30. And it still costs just
> US$35. Or indeed, US$5 for the new Pi Zero, which whilst a mere single-core
> ARMv6 is still ~40% faster than the original hardware and so a decent
> Scratch-box. For FIVE DOLLARS! 40 Dorado for FIVE DOLLARS!
>
>
> tim
> --
> tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
> Useful random insult:- In serious need of attitude adjustment.
>
>
>
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