LRB V2.4 Mod for data_valid outputs

Maintained by . Updated 5/20/2002.

This page documents a modification which can be made to link receiver boards to bring out a "data valid" signal for user logic.
Note the following

Only applies to V2.4 PC boards (find text "LRB V2.4" etched in the board near the "J3" silkscreen label). The version number text is etched in the copper under the solder mask so it is hard to see.
Please upgrade your LTB firmware to at least Revision V2_15 for everything to work well. You can check the revision in the status display of the motherboard software (or by reading offset 8 in configuration space). You can get new firmware HERE.

Performing the Mod

Basically what is needed is to add 3 wires to the J7 connector. See the photos below.

Wire from	Wire to
J7 - 61	J7 - 16
J7 - 59	J7 - 17
J7 - 57	J7 - 19

There is one catch... the connector pin on pin 57 (red arrow in first photo below) must be unsoldered from the pad on the PCB (it can be cut off) and the wire soldered to the PCB pad only.

If you destroy the pad in the process, the second photo shows a via where you can solder a wire to J7-19 to accomplish the same thing.