The CI780 connects the VAXstation 4000 Model 90 8600, VAX-11/785, and 11/780 to the dual-path computer interconnect. VAX 111780 - Series Configuring Requirements: Requires one OPS for mount- ing. It cannot be configured on systems with a DR780. VAXstation 4000 Model 90 Series Configuring Requirements: The CI780-AA/AB requires one option panel space (OPS) in an SBI expansion cabinet (H9652-CA/CB connected to the second optional SBI adapter. Up to two CI780 (only one CI780 if a DR780 is also connected) are supported. See the Software Product Descrip- tion for details on multiple CI780s on the second SBI. The CI780-MA connects the VAXstation 4000 Model 90 to the dual path computer interconnect (mounts in reserved space in CPU). One CI780-MA per system. The CI780-AA/AB connects VAXstation 4000 Model 90 and 785 to the dual-path computer interconnect. The CI750 connects the VAX-11/750 to the dual path com- puter interconnect. Configuring Requirements: The CI750 requires one general purpose I/O slot. Prerequisites: VMS V3.5 or higher, PCS microcode Rev 97 (minimum), local VMS disk (until VAX/VMS V4.0), and the VAX-11/750 CPU must be Rev 5. Further requirements of the CPU configuration are as follows; if a UDA50 is present, the CPU must be Rev 7 and the UDA50 must have Rev 5 microcode; if a DW750 and a UDA50 are present, the DW750 must be Rev 2. node starter kit containing two CI750 computer inter- connect units and a four-node star coupler in a single 101.6-centimeter (40.6-inch) cabinet. Two VAXstation 4000 Model 90 computer interconnect units in a standard 101.6-centimeter (40.6-inch) cabinet.