PCjr Non-keyboard Scan Code Translation Table

        Format of translation table:

        Offset  Size    Description
         00h    BYTE    number of nonkeyboard scancodes in the table
         01h  N WORDs   high byte 00h (NUL) byte scancode with low order byte
                        representing the scancode mapped values relative to
                        their input values within the range of 56h through
                        7Eh