Difference between revisions of "PDP-11"

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Revision as of 23:39, 15 May 2007

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.

PDP-11 Models and notes

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 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