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.
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:
- 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.
- 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)
- 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
