EMM386SX.SYS automatically excludes from mapping any addresses that are reserved for use by your system ROM and RAM. If you install an option card, such as a network card, that uses the memory address range C000 through E000, include the X parameter in the DEVICE= command line to exclude this memory range from expanded memory mapping.

For more information about your system’s memory, see “System Memory Map” in Appendix A.

Using the VGA Utilities

Your built-in VGA (video graphics array) display adapter supports both standard VGA monitors and multi-frequency monitors with analog connectors. The VGA adapter operates in all standard VGA resolutions without requiring any device drivers. However, if you are using a monitor that supports extended VGA features, you may want to use one or more of the device drivers provided on the Utility diskettes that came with your computer.

You need to install the VGA device drivers if you want to use extended VGA features such as these:

PResolutions up to 800 x 600 in graphics modes with 16 colors

Q132-column text mode in 16 colors

Cl Graphics cursor movement performed by the built-in VGA hardware.

Enhancing System Operations 4-11