I had Simpad in the past!!!
now i found a Siemens Mobic T8 Pad. the device looks like quite similar to the Simpad SL4 but ruggerized, with a secons PCMCIA slot, 7 keys and a ethernet port, the serial port is a DB9 and not the Lumberg connector.

Anyone has information or experience to install linus in these devices?

Thank you i nadvance for your help.