static unsigned short chanOffs[6]={
  0x00, 0x01, 0x02, 0x100, 0x101, 0x102
};
static unsigned short opOffs[4]={
  0x00, 0x04, 0x08, 0x0c
};
static unsigned char konOffs[6]={
  0, 1, 2, 4, 5, 6
};
static bool isOutput[8][4]={
  // 1     3     2    4
  {false,false,false,true},
  {false,false,false,true},
  {false,false,false,true},
  {false,false,false,true},
  {false,false,true ,true},
  {false,true ,true ,true},
  {false,true ,true ,true},
  {true ,true ,true ,true},
};
static unsigned char dtTable[8]={
  7,6,5,0,1,2,3,0
};
static int dacRates[6]={
  160,160,116,80,58,40
};
static int orderedOps[4]={
  0,2,1,3
};

#define rWrite(a,v) pendingWrites[a]=v;