Pdp-11
2 definitions retrieved  PDP-11 Programmed Data Processor model 11. A series of minicomputers based on an instruction set designed by C. Gordon Bell at DEC in the early 1970s (late 60s?). The PDP-11 family, which came after, but was not derived from, the PDP-10, was the most successful computer of its time until it was itself succeeded by the VAX. Models included the 11/23 and 11/24 (based on the F11 chipset); 11/44, 11/04, 11/34, 11/05, 11/10, 11/15, 11/20, 11/35, 11/40, 11/45, 11/70, 11/60 (MSI and SSI); LSI-11/2 and LSI-11 (LSI-11 chipset). In addition there were the 11/8x (J11 chipset) and SBC-11/21 (T11 chip) and then there was compatibility mode in the early VAX processors. The B and C languages were both used initially to implement Unix on the PDP-11. The microprocessor design tradition owes a heavy debt to the PDP-11 instruction set. See also SEX. (1994-12-21)  PDP-11 Possibly the single most successful minicomputer design in history, a favorite of hackers for many years, and the first major Unix machine, The first PDP-11s (the 11/15 and 11/20) shipped in 1970 from DEC; the last (11/93 and 11/94) in 1990. Along the way, the 11 gave birth to the VAX, strongly influenced the design of microprocessors such as the Motorola 6800 and Intel 386, and left a permanent imprint on the C language (which has an odd preference for octal embedded in its syntax because of the way PDP-11 machine instructions were formatted). There is a history site. Pdp-11 related |
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