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IBM Fixed Disk Adapter - Cabling Information

This is the hard drive controller that Xebec made for IBM's use in the IBM 5160 (IBM XT).
I sometimes refer to these as the 'IBM/Xebec HDD controller'.

Click here to see what the terminating resistor (terminator) and shunt block on the IBM supplied Seagate ST-412 looks like.

Generally, you have a choice between using a flat (straight-through) control cable, or a twisted control cable.


OPTION #1:  Flat (straight-through) control cable

Click here to see a cabling diagram for single-drive configuration.
Click here to see a cabling diagram for dual-drive configuration. (Two hard drives will require an upgraded PSU, one that is able to cope with the power requirements.)


OPTION #2:  Twisted control cable

Click here to see a cabling diagram.
Click here to see a cabling diagram for dual-drive configuration. (Two hard drives will require an upgraded PSU, one that is able to cope with the power requirements.)

Click here to see the difference between a floppy twisted cable and hard drive twisted cable.

Click here to see what I call a double-twisted cable, a cable with twists at two locations. Rare, but it needs to be compensated for.