> On 10-10-2015, at 3:59 PM, H. Hirzel <hannes.hirzel at gmail.com> wrote:
> Main improvements of the new Squeak version on Raspberry Pi are
> 
> -    a significant increase in speed, Scratch up to 10 times faster
>     (thanks to Cog by Eliot Miranda)

Having a Cog VM is responsible for ~ 3x of that, probably. There’s a *lot* of other stuff that has gone into speeding up Scratch on the Pi. 

> -    the addition of a built-in GPIO server.


There’s a first pass at a technical manual/ tutorial for that at https://www.raspberrypi.org/documentation/usage/scratch/gpio/README.md

> 
> https://www.raspberrypi.org/blog/a-new-version-of-scratch-for-raspberry-pi-now-with-added-gpio/
> 
> Is there a page with more details?

There isn’t a lot more to say for general consumption. Eliot has some discussions of Cog on his blog, the gpio stuff is documented as above and all the other stuff is just better written Smalltalk. Oh, and the faster ARM bitBLT that Ben Avison wrote for me. That’s been in the vm sources for a couple of years I think.

There are also a couple of podcasts done recently on the subject of Pi/Squeak/Scratch -
http://thepipodcast.com/the-pi-podcast-4-tim-rowledge-scratch/
http://smalltalkinspect.podspot.de/post/028-en-current-situation-smaltalk-under-piarm/


tim
--
tim Rowledge; tim at rowledge.org; http://www.rowledge.org/tim
EBCDIC: Erase, Back up, Chew Disk, Ignite Card