From: theguitarmanSPAM@charter.net   
      
   Frank,   
   Right off the bat may I say, "Thank you" for taking the time to post all the   
   great history & info!   
   To me this stuff is just fasinating! :-)   
   A question for you if I may.   
   The model 4 "base model" that I have with 16k of memory? Would it require a   
   lot of mods to upgrade the memory to 64k or 128k?   
   I heard something about a PAL chip being needed or such. Is it overly   
   complicated or even available for that matter?   
      
   Thank you!   
   -Chris   
      
      
   "Frank Durda IV"  wrote in message   
   news:J1zLz8.ytw@nemesis.lonestar.org...   
   snip..   
      
   > The ability to use 16K RAM chips was dropped after a board revision   
   > or two, because the 16K units were not selling (not even useful as   
   > education network stations), and eliminating the capability to use   
   > the 16K chips meant dropping several jumpers and some circuitry for   
   > the three voltages the 16K chips required.  The 64K chips only used   
   > a single voltage.   
      
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