From: ianmav@netspace.net.au   
      
   Neither the Model III or 4 have internal drives that are terminated.  For   
   whatever reason its not needed (Frank Durda IV?), only the external drives   
   need termination.   
      
   Frank - is there any benefit from adding termination to the internal drive 0   
   in a Mod 3 or 4?   
      
   Ian.   
      
      
   "eugene"  wrote in message   
   news:1181288169.072533.93560@n15g2000prd.googlegroups.com...   
   >I just rescued a Model 4 in sad shape from an electronics recycler.   
   > It won't boot from drive 0 and the motor is acting really strange.  I   
   > pulled both drives out and neither one of them is terminated!  I put   
   > in a Teac FD-55BV just for testing and it boots.  So the machine is   
   > working.   
   >   
   > My question is this, I know that one of the lines that is terminated   
   > by the resistor network is the Drive Motor Enable.  Since it isn't   
   > being terminated this could explain the strange motor behaviour.  I   
   > don't have a termination resistor network.  I'm assuming that it's   
   > just a 150ohm network wired straight through?  That is, 150ohms   
   > between pins 1 and 16, 2 and 15, etc.  I couldn't find specifications   
   > for the resistor network in any of the TM100 documentation other than   
   > a web site which claimed it to be 150ohms.  That seems small to me.   
   >   
   > Does anyone know the specifications on the termination network?   
   >   
      
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