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)
Read Also:
- Pdp-6
computer Programmed Data Processor model 6. A computer designed around 1960 with more or less exactly the same hardware architecture as the PDP-10. It already had multi-user time sharing and batch processing and multi-level priority interrupts (1996-12-21)
- Pdp-7
computer A minicomputer sold by DEC in 1964. It had a memory cycle time of 1.75 microseconds and add time of 4 microseconds. I/O included a keyboard, printer, paper-tape and dual transport DECtape drives (type 555). DEC provided an “advanced” Fortran II compiler, a Symbolic Assembler, Editor, DDT Debugging System, Maintenance routines and a library […]
- Pdp assembly language
language (PAL) The assembly language for the PDP-8 and PDP-11. [Description?] (1995-01-26)
- Pdq
Informal. 1. immediately; at once: You’d better get started P.D.Q. abbreviation 1. pretty damn quick also pdq, initialism for pretty damn quick, attested from 1875. adverb Pretty damn quick (1875+) 1. Physicians Data Query (of the NCI) 2. pretty damn quick 3. pretty damn quickly
- P-d ratio
noun 1. short for price-dividend ratio