PDP-11/40
| PDP-11/40 | |
 PDP-11/40 with TU56 dual DECtape drive. | |
| Manufacturer: | Digital Equipment Corporation |
|---|---|
| Word Size: | 16 bit |
| Physical Address Size: | 18 bit |
| Virtual Address Size: | 16 bit |
| Bus Architecture: | UNIBUS |
The PDP-11/40, introduced in 1973, was the first machine to introduce 18-bit memory addressing on the PDP-11 platform.
The OEM version of the 11/40 is the 11/35. A special 11/40 with a blue front panel was used as the front-end for the KL-10 in DECSystem-10s and DECSystem-20s---though the 11/40 panel was hidden behind a cabinet door on the 20.
The 11/40 was also the primary platform for early UNIX.
| v • d • e PDP-11 Computers and Peripherals |
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| UNIBUS PDP-11s - PDP-11/20 • PDP-11/15 • PDP-11/35 • PDP-11/40 • PDP-11/45 • PDP-11/50 • PDP-11/55 • PDP-11/70 PDP-11/05 • PDP-11/10 • PDP-11/04 • PDP-11/34 • PDP-11/60 • PDP-11/44 • PDP-11/24 • PDP-11/84 • PDP-11/94 QBUS PDP-11s - PDP-11/03 • PDP-11/23 • PDP-11/23+ • MicroPDP-11/73 • MicroPDP-11/53 • MicroPDP-11/83 • MicroPDP-11/93 QBUS CPUs: LSI-11 • LSI-11/2 • KDF11-A • KDF11-B • KDJ11-A • KDJ11-B • KDJ11-D • KDJ11-E Buses: UNIBUS • UNIBUS map • SPC • MUD • EUB • QBUS • CD interconnect • PMI Also: PDP-11 architecture • PDP-11 Extended Instruction Set • FP11 floating point • PDP-11 Memory Management |
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