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The
PDP-11/73 was the third generation of the
PDP-11The PDP-11 was a series of 16-bit minicomputers sold by Digital Equipment Corporation from 1970 into the 1990s, one of a succession of products in the PDP series. The PDP-11 replaced the PDP-8 in many real-time applications, although both product lines lived in parallel for more than 10 years...
series of 16-bit
minicomputerA minicomputer is a class of multi-user computers that lies in the middle range of the computing spectrum, in between the largest multi-user systems and the smallest single-user systems...
s produced by
Digital Equipment CorporationDigital Equipment Corporation was a major American company in the computer industry and a leading vendor of computer systems, software and peripherals from the 1960s to the 1990s...
to use LSI processors. Introduced in 1983, this system used the
Jaws-11The J-11 is a microprocessor chip set that implements the PDP-11 instruction set architecture jointly developed by Digital Equipment Corporation and Harris Semiconductor. It was a high-end chip set designed to integrate the performance and features of the PDP-11/70 onto a handful of chips...
chip set and the
Q-BusThe Q-bus was one of several bus technologies used with PDP and MicroVAX computer systems manufactured by the Digital Equipment Corporation of Maynard, Massachusetts....
, with a clock speed of 15.2 MHz.
The 11/73 (also known as the KDJ11A) is a dual height module with on board bootstrap, cache and bus interface. From a speed perspective it suffered from accessing memory over the
Q-busThe Q-bus was one of several bus technologies used with PDP and MicroVAX computer systems manufactured by the Digital Equipment Corporation of Maynard, Massachusetts....
rather than the private memory interconnect bus adopted by the later PDP-11/83.