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Atmel ATmega8 (a la Arduino) as basis for our CPU: (cpu#2)

• 1] Serial communications between modules over two wires - extending from centre of cpu_model to twin (copper) circles surrounding model and accessible.
• 2] Bootloader and instruction set. As model for this we can use Arduino:

See particularly for commandline use:

http://www.arduino.cc/playground/Learning/

• 3] As programmer we use:

AVR programmer USB, stk500 V2 compatible

http://shop.tuxgraphics.org/electronic/microcontroller.html?id=2b93dd

http://www.tuxgraphics.org/electronics/200510/article05101.shtml

• 4] Key software:

gcc-avr

avr-libc

avrdude

resurrected from old archive: (old_sci_am_archive#1)

How streams of water can be used to create analogues of logic circuits

Scientific American August 1962: