| Bits | Name | Description |
| DSPs 1-4 Stack Word | ||
| 15-11 | Vnew[5..1] | Director Bits for Current Link Data Word |
| 10 | C | Current Word is Last Word in Data Block |
| 9 | VME | =0: Data from Link =1: VME Command |
| 8 | O | Overflow - current word is 256th in block |
| 7-0 | DAT | sercount for Link Data command number for VME Data |
| DSP 5 Stack Word | ||
| 21-17 | Vold[5..1] | Director Bits for Previous Link Data Word |
| 16-12 | Vnew[5..1] | Director Bits for Current Link Data Word |
| 11 | C*P | Current Word is Last Word in Data Block |
| 10 | F | Full Readout Bit for Current Input |
| 9 | VME | =0: Data from Link =1: VME Command |
| 8 | O | Overflow - current word is 256th in block |
| 7-0 | DAT | sercount for Link Data command number for VME Data |