2 Train Smart Stops Combinator [item=fcpu]

Blueprint.bp

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Combinator.asm

:start
#init
clr reg
mov r1 [item=copper-plate]
ugpf r1 r1 'stack_size'
ugpf r2 [item=cargo-wagon] 'get_inventory_size(defines.inventory.item_main)'
mul r1 r2
#test if trains in stops
fir r2 [virtual-signal=signal-T]
bne r2 0 :allow_both
fig r2 [virtual-signal=signal-T]
bne r2 0 :allow_both
#get stocks qty
fig r2 r1
fir r3 r1
tge r2 r1
  ssv r2 1
tge r3 r1
  ssv r3 1

#if both 0 or 1, allow both
beq r2 r3 :allow_both
bge r2 1 :allow_left
bge r3 1 :allow_right
jmp :start

:allow_both
mov out1 1[virtual-signal=more-signals-left-yellow]
mov out2 1[virtual-signal=more-signals-right-yellow]
jmp :start

:allow_left
clr out2
mov out1 1[virtual-signal=more-signals-left-yellow]
jmp :start

:allow_right
clr out1
mov out2 [virtual-signal=more-signals-right-yellow]
jmp :start