DOS Compativility

OS/2 2.0 provides a redesigned DOS compatibility environment known as Enhanced DOS Sessions. Features of Enhanced DOS Sessions include:

The Enhanced DOS Session mechanism is composed of three modules, DOS Emulation, 8086 Emulation, DOS Session Manager, which provides a full set of control program interfaces known as Virtual Device Helper services. These services are invoked by VDD modules. VDD modules provide hardware-specific support, such as hardware virtualization, BIOS emulation, and other low-level system functions.