Editing Tandberg Data TDV 5000 Series (section)

====Keylocks====
The earlier TDV 2200 series of terminals sometimes came with two keylocks on the keyboard. Code for this can also be found in the firmware, but no known keyboard in the series has the actual keylock-switches themselves installed. The keylocks are readable from the PC using the non-standard command 0xEC, whereupon the keyboard responds with an Ack followed by a number from 0xF6 to 0xF9 depending on the keylocks' state.

The normal type 967043 matrix-board does not have any switch position for retrofitting the keylock-switches, only the corresponding diodes. Adding this feature to an existing keyboard would therefore require some patchwork or a different matrix-board.