Palm III to m5xx bridge

This page was inspired by the original hack in Japan. You can view pictures and more infomation (in Japanese) at http://yokohama.cool.ne.jp/ja037069/505pd.htm

Since there was no wiring diagram on the site, I decided to look in the docs that were linked on the page (http://www.palmos.com/dev/tech/palmhardware/").

Now, I am no electronic expert, and I make no claim that this will actually work, but it looks like the pin layouts are similar with the addition of USB pins on the m50x. So this is what I came up with.

Wiring Diagram

For those who want text:

Palm III Pins ----> Palm m50x Pins
1 ----> 5
2 ----> 9
3 ----> 10
4 ----> 14
5 ----> 11
6 ----> 13
8 ----> 8
10 ----> 1 or 7

Some notes:

  1. I recommend you look at the serial specs on Palm's site before trying this; again, I'm no expert, and won't be held responsible if you burn up your m50x.
  2. Not all the Palm III pins are used, as noted on Asahi's site. (7 is for hotsync, and 9 is unused for future design by Palm)
  3. Not all the Palm m5xx pins are used. Some are for USB, and/or not currently in use.

I don't have a m5xx to test with, but if someone would like to send me one, I'd be more then happy to accept. :-)

Also, someone want to market this idea and create a bridge, lwet me know. Lets do business!

If someone finds that my idea is incorrect (I missed a pin, or assumed something wrong) please let me know. Again, no expert, but it seems logical to me.

Questions? Comments? justin@J5studios.com