Upgrading the HandSpring Visor
I received the following email from Mark Huie. In it, he describes how to upgrade the 2M Visor to 8M. Thanks Mark!
Tim, If you're interested, I've upgraded my standard Visor from 2M to a Deluxe-like 8M by simply making my memory board look like the Deluxe's (upgrading the chip and moving the jumpers around.) I didn't take that great of pictures (yours are great), but if you want to post the instructions, I'm sure your page would be a great resource (as opposed to my nonexistent page). here's what I did: I attempted to copy the picture the memory board onhttp://www.mikew.org/html/visordeluxe.html.
That essentially consisted of replacing the chip and swapping jumpers- the extra filter capacitor that the 8M chip needed was actually already on the board. I pulled the jumpers off positions R17, R21, R23, and R26 and put them in R16, R22, R24, and R25. They pretty much are positioned in pairs- R16 & R17, R21 & R22, etc., the main thing is that the R19/R20 pair is not swapped. A helpful hint is that if you're using a hot-air reflow machine, you should remove the components from near the memory chip before attempting to replace it or else you get capacitors and jumpers blowing across your workspace. I did lose a couple of jumpers, but merely replaced them with bits of wirewrap wire. Luckily I didn't lose any capacitors. -mark
See my IIIe/IIIx upgrade page for some sources for the 8M RAM chips.
Check out my other palm pages at http://www.interlog.com/~tcharron/Palm8M/index.html.