Univac 9400 tape and disc controller

Lmpchen des Bandcontrollers

Each single peripheral device can be controlled both from the processor and from the controller with a switch-register featuring a lamp display. That way, a malfunction can be narrowed down, since any data could be recored externally and analyzed manually afterwards.

On the upper picture you see the panel of the tape unit, below the panel of the disc controlling unit.

Lmpchen des Disk-Controllers