09-25-18 10:42 cbmeeks wrote to All about User Port Pins   
   Howdy! cbmeeks,   
      
   I couldn't find my C=64 Programmers Reference Manual to help You but   
      
      
   go to   www.zimmers.net   if You have a internet connection.   
      
   He has all kinds of information on Commodore Products.   
      
      
      
    cb> @MSGID: <5BAABE2F.2792.cbm@capitolcityonline.net>   
    cb> I'm curious about how to access certain pins of the C64 User Port.   
    cb> Going by the pinout here:   
      
    cb> https://www.c64-wiki.com/wiki/User_Port   
      
    cb> I see there are some pins I'm not familiar with.   
      
      
    cb> 4       CNT1.Counter 1, from CIA #1   
    cb> 5.SP1.Serial Port 1, from CIA #1   
    cb> 6.CNT2.Counter 2, from CIA #2   
    cb> 7.SP2.Serial port 2, from CIA #2   
    cb> 8./PC2.Handshaking line, from CIA #2   
    cb> 9.ATN.Serial attention in   
    cb> ...   
    cb> B./FLAG2.Flag 2   
    cb> ...   
    cb> M.PA2.PA2   
      
      
    cb> I have a basic idea what the counters are for but I'm looking for more   
    cb> detailed information on all of those pins.   
      
    cb> Are there any programming and/or schematics out there that indicate how   
    cb> to use them in various projects?   
      
    cb> Thanks   
      
      
   ... "It Shouldn't Be This Hard" - Leo Notenboom   
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