Performance Concerns
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     Because the PCBIOS terminal driver uses buffered screen writes for all
     screen painting, some operations, especially those that scroll the
     screen, are slow.  These include:

     1. All box drawing commands and functions

     2. All console commands and functions when scrolling

     3. All clear screen commands and functions

     4. All restore screen commands and functions

     5. Standard out functions (OUTSTD() and OUTERR()) whether the screen is
        scrolling or not