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NAME   rev ADDR type chip Description
---------------------------------------------------------------------------
AUDxVOL   0A8    W   P    Audio channel x volume

         This reg contains the volume setting for audio channel x.
         Bits 6,5,4,3,2,1,0 specify 65 linear volume levels as shown below.

         +--------+--------------------------------------------------+
         | BITS   | USE                                              |
         +--------+--------------------------------------------------+
         | -15-07 | Not used                                         |
         |  06    | Forces volume to max (64 ones,no zeros)          |
         | 05-00  | Sets one of the 64 levels (000000 = no output,   |
         |        | 111111 = 63 ones, one zero)                      |
         +--------+--------------------------------------------------+