| 00540 | 0621 00 0 00631 | 394 | STA | WTIOC SET UP I-O COMMANDS | ||
| 00541 | 0622 00 0 00631 | 395 | STD | WTIOC | ||
| 00556 | −0774 00 4 00631 | 408 | AXC | WTIOC,4 POINTER TO IO COMMAND | ||
| 00560 | 0534 00 4 00631 | 410 | LXA | WTIOC,4 ADDRESS OF BEGINNING OF BLOCK | ||
| 00563 | −0534 00 4 00631 | 413 | LXD | WTIOC,4 COUNT OF BLOCK |