XTAL1
{8000, 0x00 | XTAL1}, {9600, 0x0E | XTAL1},
{11025, 0x02 | XTAL2}, {16000, 0x02 | XTAL1},
{27420, 0x04 | XTAL1}, {32000, 0x06 | XTAL1},
{38400, 0x0A | XTAL1}, {44100, 0x0A | XTAL2},
{44800, 0x08 | XTAL1}, {48000, 0x0C | XTAL1},
{48000, 0x0C | XTAL1} /* really a dummy for indexing later */