I was given the register information for the Jornada 928 which uses the same F1769 companion chip as the 540 series. It seems like the best place to start I'd begin working on this myself but my system right now is a Win2k3 box since its modem is a softmodem and go's 14.4K with the linmodem drivers
Attachment:
jornada928-regs.h
Description: Binary data