Alternate display content controller

A system for enlarging a display area of a video display system having memory, the system having an interrupt descriptor table, comprising:

• display controller that
• locates additional memory to correspond to a new display area portion;
• determines whether the located memory is associated with another video display system function;
• and
• when it is determined that the located memory is associated with the another video display system function, moves the use of the located memory by modifying the interrupt descriptor table to capture attempts to access the located memory by the another video display system function and to substitute a different portion of memory for use by the another function so that the located memory corresponds to the new display area portion.

A computer-readable memory medium containing instructions for controlling a computer processor to enlarge a display area of a video display system by:

• locating additional video display memory to correspond to a new display area portion;
• determining whether the located memory is associated with another video display system function;
• and
• when it is determined that the located memory is associated with the another video display system function, moving the use of the located memory by modifying an interrupt descriptor table to capture attempts to access the located memory by the another video display system function and to substitute a different portion of memory for use by the another function so that the located memory corresponds to the new display area portion.