Requirements

• Device -- Palm III required
  

  The Palm III comes with OS3, and 2M of memory. It is manufactured with two kinds of memory module. See here to determine what kind your device has. If you have a DRAM based ("new") type, then the module can be modified to have 8M of memory -- read below! If it is an SRAM based ("old") type, then it can only be modified to have 4M -- see Till Harbaum's 4M Palm III upgrade.)

  Sorry, but if you have any other device, then I don't know how to upgrade it to more than 8M unless it is described on my upgrade page here

WARNING

Modifying your device will void the warranty provided by the manufacturer!

Upgrading the III to 8M

Step one -- the chip Remove the RAM chip from the board Prepare the replacement RAM chip by bending pin 31 slightly up (to prevent it from touching the board once it is installed. Don't break it off, you'll need to attach a wire to it later. Solder the 8M DRAM chip to the board. (don't solder pin 31!) Connect a small jumper from pin 31 to the connector strip #14 (7th from the right). Try to avoid soldering directly to the gold pad.

Step 2 -- the back

There are 7 steps required. On the back of the board, gently cut the long diagonal trace on the left (see image) Connect the 5 jumpers are illustrated. You may need to remove some of the green solder-resist material first. Add a small jumper, or just flow the solder over the two very close gold contacts at the left of the board (see illustration).

Click for more detail

Good luck!

Parts

The 8M DRAM chip required should be a 4K refresh chip. Self refresh is NOT required for this upgrade. Some compatible parts are:

• KM416V4104[ABC]S-6 - Samsung (or KM416V4104[ABC]S-L6)
• UPD42S65165G5-A60 - NEC
• HM5165165LTT-6 - Hitachi
• MT4LC4M16R6TG-6 - Micron
• M5M465165[AB]7P - Mitsubishi

Compatible chips are available here:

• http://www.interwb.com/memory.html#PILOT
• http://www.netbuy.com/
• http://www.marshall.com/
• http://www.reptron.com/
• http://www.avnet.com/

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Check out my other palm pages at http://www.ImpressiveStuff.com.