Yeppi ! I get it !

Windows XP under VirtualBox on a iMac i7 27.

Also the cheap USB-Serial Adapter from Supermarket works !

Last step ( Problem ) is the result ion of the Display . i want the 2560 x 1440

Don´t know why it works only with 1600 x XXX.

VirtualBox can work in Fullscreen Modus.

XP said is Limited to 1600 x  ( don´t know why ) , but it didn´t capture the Fullscreen Modus in VirtualBox

Visg has no limit ..or ?

Thanks