F18

A simulator of the Green Array F18A chip.

The simulator is a bit different than the chip since it interprets the input from the io registers rather than just expect a binary stream of 18 bit input.

This makes it super simple to write programs for the F18A simulator since you can feed it straight in.

Build

cd src
make

Run

Have a look in the test directory and run the examples by

cd test
../bin/f18 < add.f18

or cd test ../bin/f18 < mult.f18

...

Options

-v     verbose   (if debug compiled)
-t     trace     (if debug comipled)
-d     delay     Set delay between instructions
-l     VxH       processor layout (max 8x18) default is 1x1!!!

Specially the last flag is worth mentioning, -l 3x4 starts 12 thread with about 1 page of node data and 4 pages of stack each. On a mac 8x18 open a bit too many socket pairs, simulating the io registers used for communication between nodes. That is memory consumption is 2.8M when running all 8x18 (144) nodes.

Remarks

The processor is interesting in a number of ways, but the way you can just bootstrap the thing from basically nothing is spectacular. Worth mentioning is also the selective receive, by using various io registers.