Posted 31 July 2010 - 05:02 AM
If the cable is an 80-wire UDMA cable, then by specification it is supposed to function as a CS cable, but generally there's no visible indication. The end device will be Master, the centre device Slave.
If it's an older 40-wire cable, it's very unlikely to be CS. If it is, there is sometimes a visible notch clipped out to break one conductor in the cable, but this doesn't have to be so, the non-connection can be inside a plug. If a 40-wire cable is CS, normally the end device is Slave, the centre device Master.
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