TYAN THUNDER LE-T User Manual page 16

2.9 ATA-100/IDE RAID Connectors (J70, J71, J83) (optional)
These (optional) headers can be used to define Promise IDE devices to the onboard ATA -
100/IDE RAID channels. J70 is the Primary ATA-100/IDE RAID connector, J71 is the Secondary
ATA-100/IDE RAID connector, and J83 controls the Promise chips.
J83
J83 works with Rev.1.07 BIOS:
Closed
Enables RAID Promise chip
Enables ATA-100 Promise chip
Open
J71
J70
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