Thanks!
Same modifications published in Hungarian Mikro Magazin. It is say the informations come from the Enterprise Computers Gmbh.
Anyway I developed some programs do this trick in software way.
With the RL command in the Zozotools can remove the German extension (or any other ROM) from the ROM list.
The DBASX can disable IS-BASIC extensions. If you use this then you can use the German keyboard handler and other functions of the German ROM (VLOAD,etc) just the German message handler not installed for the BASIC.
If this handler installed then some areas of the Basic moved to another location. Many Basic programs which are using direct POKEs (wrong idea on the EP!) then not running correctly on German machine. This is the main reason why needed to switch of the German extension. With the DBASX can easy disable the problematic part.
