Scratch@BSD

• House keeper
• 610t: "無糖ティ (MUTOU-TEE)" means "tea without sugar".

I am interested in ...

• BSD OS: FreeBSD (PR), OpenBSD, NetBSD, (macOS?)
• Education: Scratch, Squeak, ...
• Long long time ago, I was teacher at NNCT and Nara def school
• Smalltalk: Squeak, Pharo, Seaside, VisualWorks...
• Some port maintainer: lang/squeak, ...

• K*BUG is Kansai regional BSD Users Group.
• Of cource, welcome from anywhere!!

(c) OpenStreetMap

• Block based programing language for educational purpose.
• Message passing, Object Oriented, parrallel, asynchronous
• Communicate with physical world: SensorBoard, Remote Sensor, WeDo, ...

• Based on Squeak 2.8 (Smalltalk).

How to play

• Install {graphics,lang}/scratch
• FreeBSD lang/scratch: send-pr 216811

/usr/share/scratch is hard coded at Scratch.image

• Work around: sybolic link from /usr/share/scratch to ${PREFIX}/share/scratch

% ln -s /usr/local/share/scratch /usr/share/scratch

• Remote Sensors Protocol can use only Scratch 1.4.
• Very simple protocol using TCP/42001
• 2 messages
• broadcast msg: send msg to every node
• sensor-update var1 val1 ... : global variable update

Demo at booth

• Physical Sensor for Scratch (Android App)
• ESP8266(ESPr(R) Developer)
• micro:bit(chibi:bit): micro:bit game controller with Scratch

• Web browser based on Flash.

How to play

• Install flash plugin for your web browser.
• Access to http://scratch.mit.edu/

• Based on Node.js.

How to play

• Detail: How to run Scratch 3 on FreeBSD
• Install Node.js environment including npm command.
• Get squak-vm source from github

% git clone https://github.com/LLK/scratch-vm.git

• Install Javascrpit libraries. Ignore errors.

% cd squeak-vm
% sudo npm install

• Run server and access http://127.0.0.1:8073/playground/

% npm start

• CogVM : New squeak virtual machine with JIT.
• Split image and squeak virtual machine at FreeBSD port.
• Port WeDo 1.0 plugin for Scratch 1.4.