DOS Fn 6520H: Upshift Character

                                                         Compatibility: 3.3+ 
 Expects: AX    6520H
          DL    character to convert
          ──────────────────────────────────────────────────────────────────
 Returns: AX    error code if CF is set to CY
          DL    converted character (if no error)
          ──────────────────────────────────────────────────────────────────
    Info: Converts the specified character to uppercase, using the
          currently-active uppercase table for the active country and code
          page.

See Also: National Language Support
          DOS Functions
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