Similar machines from DEC are the PDP-12 which is a modernized version of the PDP-8 and LINC concepts, and the PDP-14 industrial controller system. ==Overview== The earliest PDP-8 model, informally known as a "Straight-8", was introduced on 22 March 1965 priced at $18,500 ().
The Straight-8 was supplanted in 1966 by the PDP-8/S, which was available in desktop and rack-mount models.
They used thousands of very small, standardized logic-modules, with gold connectors, integrated by a costly, complex wire-wrapped backplane in a large cabinet. In the later 8/S model, introduced in August 1966, two different logic voltages increased the fan-out of the inexpensive diode–transistor logic.
Gordon Bell and Allen Newell, 1971, Computer Structures: Readings and Examples, McGraw-Hill Book Company, New York.
The 1974 Pocket Reference Card for the PDP-8/E gives a basic instruction time of 1.2 microseconds, or 2.6 microseconds for instructions that reference memory. The PDP-8 was designed in part to handle contemporary telecommunications and text.
The last commercial PDP-8 models introduced in 1979 are called "CMOS-8s", based on CMOS microprocessors.
Intersil sold the integrated circuits commercially through 1982 as the Intersil 6100 family.
In comparison, small microcontrollers (as of 2008) usually have 15,000 or more.
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