From: schmidtd@my-deja.com   
      
   On 7/19/22 10:10 PM, Anthony Ortiz wrote:   
   > On Tuesday, July 19, 2022 at 10:05:57 PM UTC-4, Michael J. Mahon wrote:   
   >>> I'm redesigning some circuitry I have on my peripheral board to a modern   
   >>> 3.3v CPLD and read some articles on the interwebs stating that TTL logic   
   >>> is about 3.4 volts so I might get away with interfacing a 3.3 chip   
   >>> straight from the Apple IIe bus and do away with the 245 transceivers I'm   
   >>> using. My gut feeling is to have the 245's there just in case and err on   
   >>> the safe side, but I'm curious as to what you guys think about going raw   
   >>> from the Apple II bus to a 3.3v GPIO that's not that tolerant.   
   >>>   
   >> Nope—you’ll need level-changing circuitry and keep the 245’s. The   
   Apple II   
   >> bus is *definitly* a TTL bus.   
   >>   
   >> --   
   >> -michael - NadaNet 3.1 and AppleCrate II: http://michaeljmahon.com   
   >   
   > Thanks Michael, you're always a great help and an invaluable source of all   
   things Apple II. :)   
      
   I have to agree.  What an absolute treasure you are, Michael.  Thank you.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)