esTc 设计中 四输入或门 ENTITY or4 is PORt(a, b, c, d: IN bIT q: OUT BIT); NDOr生 ARCHITECTURE arch of or4 is BEGIn g=a or b oR C OR d; END arch设计中心 四输入或门 ENTITY or4 IS PORT (a,b,c,d : IN BIT ; q : OUT BIT) ; END or4 ; ARCHITECTURE arch OF or4 IS BEGIN q <= a OR b OR c OR d; END arch;