...
Each RCE has 2 8-character LED multi-function-display (MFD) chips on the front-panel (4 chips totalMFDs per board, since there are 2 RCEs per board). The first of these two is controlled by powerPC software in the FX60: this it displays the value stored in a DCR register. The second is controlled by firmware in the 4 FX20 FPGAs (2 characters per FX20).
...