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

@@ Line 70: / Line 70: @@
 |[[UNIBUS]]
 |18-bit
+|
+|-
 |[[PDP-11/04]]
 |([[1976]])