RK11-D and RK11-E Moving Head Disk Drive Controller

The RK11-D and RK11-E are controllers for rotating mass memories, designed to interface with up to eight daisy-chained RK05 disk drives via the PDP-11 Unibus. The manual covers the functional description of the controller's four modules (M7254, M7255, M7256, and M7257), installation procedures, and detailed programming considerations, including register bit assignments, data format specifications, interrupt handling, and timing considerations for concurrent disk drive operations.