[Arm-netbook] [EOMA68-A20] SATA testing

[luke.leighton]

ESTXP: 0.347ns, length 50.59044mm
ESTXM: 0.354ns, length 51.56476mm

$ python
>>> 50.59044-51.56476
-0.9743199999999987

that's.. about 1mm out, and it's 0.007ns (7.0picoseconds) difference...


receive lines:

ESRXP: 0.370ns, length 54.0199mm
ESRXM: 0.370ns, length 53.97603mm

which is 0.04387mm difference (that's more like it).

ok according to this:
http://www.knowledgetek.com/graphicsNew/SerialATA_Revision_3_1_Gold-KT.pdf

page christ-knows-what, something like 238, search for "tx skew", up
to 30ps is ok.  still not _massively_ happy about a 1mm difference but
hey.