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