RTL Logic

[Jim Battle]

der Mouse wrote:

>>Wired-OR will work fine for open-collector output TTL.
>
> Well, except you generally get wired-AND, because the open collectors
> are generally NPN collectors with emitters to ground, not PNP
> collectors with emitters to Vcc.

That is twice you've tried to make this point.  If a signal is viewed as 
active low, then what is going on is logically wired-or.  Imagine an 
active low reset signal with two open collector drivers on it.  If 
either or both drivers pull down, then reset is activated.  OR in this 
case, not AND.