From: "Matt Osborn" Subject: TECH: Replacing 4116 RAM with 4164, 41256, etc. Date: Monday, October 23, 2000 12:40 AM I saw some posts recently about replacing 4116 RAM with 4164, which is more reliable (it uses only one voltage, not three!) and is cheaper (if you know where to look!). I wanted to come up with a solution that works for all boards (no board hacking or harness tricks involved). So here it is: Take your 4164 chip and bend pin 8 up and over the top of the chip. Solder a small wire from that pin to pin 9 (which is directly across from it, and has +5V on it). Pin 1 of the 4164 is not used... just snip it off so you don't have to worry about the -5V on the board. That's it. The chip is ready to plug into the socket of the 4116. You can do almost the same thing with a 41256 (also known as TMS4256, MCM6256, HM51256, MB81256, etc., 256k*1). In addition to flipping up pin 8 and connecting it to pin 9, bend up pin 1 and connect it to pin 16 (that'll tie the high address line to ground... you can't leave it floating). I used TMS4256 to replace some blown out 4116 in my Juno First, and it works great. Runs much cooler!!! Soldering the wires is a little bit of work, but worth the effort. Matt http://ozborn.home.netcom.com/levelers.html