Most of the parameters in this section deal with timing concerns and the way in which interrupts are handled. This section has, by far, the largest number and widest range of parameters available. Some entries in this section may specify virtual device drivers. Virtual device drivers are built into the WIN386.EXE file. Due to the range of operational parameters supported under this section, let's take a look at each of the types of parameters separately.
Device driver Defines the specific drivers used with the display, mouse, keyboard, and so forth.
It also identifies any drivers that must be handled locally in each virtual session. In this situation, the device driver name specified must exactly match the case of the driver filename. For example, CON will be listed as a local device. A large number of device driver entries are available for defining serial port support. They allow you to specify serial ports at interrupts or addresses other than the default, set buffer sizes, and define communications parameters.