STUBA20

Purpose:    Defines a special driver that increases performance of the
            system located in high memory.

Syntax:     STUBA20=<ON|OFF>

By default: STUBA20=OFF

Note:
     A special XMS support driver is required for allocating the system in
high memory. Any interrupt intercepted by the system leads to a HMA
access request driver call. When STUBA20=ON, the system controls the driver
calls that enable or disable HMA, so that no additional calls are made. The
result is a slightly improved system performance.

Warning! Not recommended for use when running programs that control the high
         memory, bypassing the XMS driver. STUBA20=ON is incompatible with
         MS-Windows.