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Product Detail

PDQ-4200 Image

NuPDPq 4200 System

Enhanced PDP-11 Qbus Replacement System

PDQ-4200 Data Sheet

PDQ-4200 Manual

SKU: PDQ-4200-AA. Category: .

Product Description

NuPDP 4200 is a modern, industry-standard system that replaces the PDP-11 chassis, CPU, memory, and mass storage. Your current PDP-11 disk images can be transferred onto a NuPDP system running your existing operating system and applications. You can select from a variety of new technology controllers such as the DRV11-WA and DRQ3B to replace popular legacy Qbus interfaces. When a new interface is not available for your application, you can choose to retain your interfaces in a Qbus chassis connected to the NuPDP, or we can design a replacement interface.


  • Obsolete disks and tapes
  • High maintenance costs
  • Aging, unreliable equipment


  • Existing applications
  • Specialized Qbus I/O interfaces
  • Packaging and cables


  • Speeds 25 times faster than a PDP-11
  • New equipment, new warranty
  • High performance disk

Qbus Support

  • Support for multiple Qbus devices
  • Follows all Qbus rules and specifications
  • Both Qbus PIO and DMA data transers are supported as well as all four Qbus interrupts
  • Qbus PIO and DMA data transfers occur at maximum Qbus speeds; throughput is limited only by the Qbus device(s)

PDP-11 Compatibility

  • Software compatible with existing applications
  • Hardware compatible
  • Diagnostic compatible

Additional Information

Processors Supported

PDP-11/03, PDP-11/23, PDP-11/53, PDP-11/73, PDP-11/83, PDP-11/93

Disk Controllers Emulated

KDA50, RLV11, RLV12, RQDX3, RQZX1, RX21, RXV11

Tape Drives Emulated

TK25, TK50, TK70, TU58

Software Supported

RSX-11M, RT-11

PDP-11 Memory

4 MB

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