Hardware Installation

Serial Port Configuration Jumpers

Serial port COM2 must be disabled since its interrupt request (IRQ) will be used by another board.

On the 6386/25 WGS (Version 1), remove the jumper between pins E25 and E26, and place it between pins E26 and E27.

On the 6386/25 (Version 2), remove the jumper between pins E14 and E15 and place it between pins E15 and E16.

On the 6386E/33 WGS, remove the jumper between pins E34 and E35, and place it between pins E35 and E36.

Replacing Disk Drive Cables

If the disk drive cables have been disconnected either to allow insertion of additional memory or to make it easier to install the tape drive, they should be reconnected as follows:

1.The wide gray cable with two connectors attached near the back of the disk controller board is the hard disk data cable. Attach either connector (whichever fits better) to the matching connector on the hard disk.

2.The narrow gray cable next to the wide gray cable is the hard disk control cable. Attach the connector to the matching connector on the hard disk.

3.The yellowish-green cable with two connectors attached near the middle of the disk controller board is the floppy control and data cable. Attach the end connector to the matching connector on the floppy disk drive.

NOTE:

Route and fold the cables carefully so that they will not interfere with the cover.

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AT&T 2.1.1 manual Serial Port Configuration Jumpers, Replacing Disk Drive Cables