Changes

The X-drives for the CPC 664/6128 are connected directly to the floppy port. To provide VDOS, the "X-Modul" (sometimes referred to as "VDOS module") had to be installed to the expansion port. This is a single-ROM board containing a VDOS 2.0-X ROM and was also available with an additional RS232-C interface (named then referred to as "XRS-Modul"). The board supplied for the CPC 464 version came with a chunky housing in which both the "X(RS)-Modul" and the DDI-1 had to be installed.