B4000000
{ 4000000, B4000000 },
{ 4000000, B4000000 },
{ 3500000, B3500000 }, { 4000000, B4000000 }, { -1, B0 }
"4000000", B4000000, \
"4000000", B4000000, 4000000,
{ 4000000, B4000000 },
{ B4000000, 4000000 },
{ B4000000, 4000000 },
"4000000", B4000000,
"4000000", B4000000, 4000000,
[B4000000] = { UNSUPPORTED }, /* 4000000 baud */
{"3500000", B3500000}, {"4000000", B4000000}, {"", 0}