G'day Zane - Like every other computer system created, the Desktop Generation has its own set of quirks and wonders. It was an interesting evolutionary repackage of the microEclipse processor, but I never saw a customer or user site actually using the Model 10's MS-DOS "compatibility feature". The hardware consisted of modular metal frame chassis with snap-on plastic covers. While great for manufacturing and cost control, the delicate plastic cover retaining tabs were always breaking and the covers would pull away from the chassis or just fall off. Only an annoying cosmetic problem until you find that a "dead man's switch" interlock was maintained by the power supply chassis front cover. Yes, the power supply would always be cut off whenever the plastic cover shifted, vibrated or fell off the chassis. Which happened often. (The cheapest solution was the unintended, creative use of a ball point pen combined with nerd engineering.) Many OEMS delivered DG/RDOS- or AOS-based applications written in ICOBOL or Business BASIC (i.e. NAPA). These were good systems for OEMs who had previously developed software for DG - providing their application was not disk-bound. DG eventually was forced to design and sell a parallel I/O bus option to help improve disk performance... to the confusion of customers previously told of the benefits of a serial I/O bus design. The system was followed by the DG/500, which had a similar hardware functional microEclipse-based design but enclosed in a then-familiar IBM PC AT (desktop) form factor. This was the final unsuccessful attempt to defend the low-end 16-bit Eclipse line from the PC onslaught. ----- Bruce Ray Wild Hare Computer Systems, Inc. Boulder, Colorado USA bkr at WildHareComputers.com ...preserving the Data General legacy: www.NovasAreForever.org