Difference between revisions of "PDP-11"

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The PDP-11 is a series of computers introduced in 1970 by Digital Equipment Corporation (DEC).

A loaded PDP-11/23 PLUS

The machine word size was 16 bits. For more information, see PDP-11 architecture.

Model	Year Introduced	Bus Type	Addressing	Notes
11/20	1970	UNIBUS	16-bit
11/05	1972	UNIBUS	16-bit
11/10	1972	UNIBUS	16-bit
11/15	1972	UNIBUS	16-bit	OEM model
11/40	1973	UNIBUS	18-bit
11/45	1973	UNIBUS	18-bit	core memory
11/50	1975	UNIBUS	18-bit	MOS memory
11/70	1975	UNIBUS	22-bit
11/03	1975	QBUS	16-bit	first QBUS model, first F-11
11/34	1976	UNIBUS	18-bit
11/04	1976	UNIBUS	16-bit
11/55	1976	UNIBUS	18-bit	fast bipolar memory
11/60	1977	UNIBUS	18-bit	writable control store
11/23	1979	QBUS	18-bit or 22-bit
11/24	1979	UNIBUS	22-bit	first UNIBUS model to use F-11 chip
11/44	1979	UNIBUS	22-bit	last non-LSI PDP-11
11/23+	1981	QBUS	22-bit
11/73	1983	QBUS	22-bit	first J-11 machine, 15MHz, integrated FPU, also first PMI PDP-11
11/53	1984	QBUS	22-bit	S-box or standard qbus, integrated FPU
11/83	1986	QBUS	22-bit	J-11 at 18MHz, integrated FPU
11/84	1986	UNIBUS	22-bit	J-11 at 18MHz, integrated FPU, 768KiW memory
11/93	1990	QBUS	22-bit	J-11 at 18MHz, integrated FPU, 2MiW onboard memory
11/94	1990	UNIBUS	22-bit	J-11 at 18MHz, integrated FPU, 2MiW onboard memory

@@ Line 40: / Line 40: @@
 |[[PDP-11/44|11/44]] ||[[1979]] ||[[UNIBUS]] ||22-bit ||last non-LSI PDP-11
 |-
-|[[PDP/11-23 PLUS|11/23 PLUS|PDP-11/23+]] || [[1981]] ||[[QBUS]] ||22-bit ||
+|[[PDP/11-23 PLUS|11/23+]] || [[1981]] ||[[QBUS]] ||22-bit ||
 |-
 |[[PDP-11/73|11/73]] || [[1983]] ||[[QBUS]] ||22-bit ||first J-11 machine, 15MHz, integrated FPU, also first PMI PDP-11