Bus Resolution

Smoke Generator

VHDL does not allow multiple concurent signal assignments to the same signal
- Multiple sequential signal assignments are allowed

LIBRARY attlib; USE attlib.att_mvl.ALL;
-- this code will generate an error
ENTITY bus IS
    PORT (a, b, c : IN MVL; z : OUT MVL);
END bus;

ARCHITECTURE smoke_generator OF bus IS
    SIGNAL circuit_node : MVL;
BEGIN
    circuit_node <= a;
    circuit_node <= b;
    circuit_node <= c;
    z <= circuit_node;
END smoke_generator;