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PDP-11 on a Board
When you want to retain your Qbus footprint
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NuPDPq 4200 Qbus System
All new technology PDP-11 replacement
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NuPDPq Qbus System
When you want to retain Qbus controllers
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PDP-11 Qbus Replacement Systems

Our Digital (DEC) replacements are complete state-of-the-art systems that replace the PDP-11 CPU, memory, disks, tapes, and I/O controllers. The NuPDP Qbus replacement systems are built on an industry-standard platform, offering complete hardware and software compatibility.

NuPDPq Options for DEC Modules

Option modules are plug-and-play replacements for popular legacy Digital interfaces. Option modules install in a NuPDPq 4200 system and offer the same functionality as the Digital equivalent, allowing users to migrate from their Qbus systems to our NuPDPq systems and maintain their investment in software and user equipment. Qbus interconnect kits, drives, accessories and spares are also available.

Bus Adapter Interconnect Kit

Logical’s interconnect kit is for the NuPDP 4200. This adapter connects your NuPDPq to your existing BA23 and BA123 chassis.


Available removable system and data drives for the NuPDP systems.

"In everything we do, we strive to exceed expectations" - Les Wellington, President

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