Chute logic

Two arc furnaces, one ore chute. If both run, they should share the ore. If one stands still, everything should go to the other. You need no sorter for that – the chute itself can do it with the digital parts.

The digital flip flop splitter#

StructureChuteDigitalFlipFlopSplitterLeft (and …Right) has one input and two outputs. Mode says where the next item goes: 0 to output 1, 1 to output 2. On top of that it counts:

With Setting 3 and SettingOutput 1 three items go left, one right, always alternating. If the value of the current side is 0, it never switches by itself.

Digital diverters#

With both values at 0 the splitter becomes a diverter: it no longer switches itself, and the chip fixes with Mode where everything goes.

and tmp a b
bnez tmp batch
seqz tmp a
sbn SPLITTER HASH("Verteiler") Mode tmp

If both furnaces run, the splitter divides 3 to 1. If only one runs, it gets everything.

Counting items#

The digital chute valve counts by itself: with Setting 10 it lets exactly ten items through after opening and then closes itself. That is a batch. The chip opens it on a button press and recognises by the change from open to closed that a batch has gone through:

seqz tmp open
and tmp tmp old
move old open

That is a falling edge – the counterpart to the rising edge of the button.