DEC machines
DEC WWW server.
PDP Page by Stephane Tsacas.
Various DEC FAQs.
PDP archive at sunsite.unc.edu.
PDP-8
(this section was contributed by Doug Jones [jones@cs.uiowa.edu])
It's worth noting that the PDP-8/S was the first computer offered for
retail sale, on a cash and carry basis. This was in 1968, when the
PDP-8/S was the least expensive computer in the world, priced at $20,000,
and a small number of people began to purchase 8/S systems as personal
computers. Continuing until around 1975, various models of the PDP-8
continued to be the most popular personal computer in the world (with a
total penetration into the home market that must have been very small).
PDP-8 WWW page.
History of the PDP-8 architecture.
PDP-8 programming and general information.
PDP-8 archive at sunsite.unc.edu.
ftp.telebit.com archive.
PDP-8 software at ftp.update.uu.se.
- Old emulator [fairly portable]
- Bill Haygood's emulator [portable]
This emulator is written in ANSI C and runs under MSDOS, AmigaOS
and several other environments.
- Emulator by Robert Supnik [Unix]
These are actually C sources for two emulators (PDP-8 and PDP-11)
written by Robert Supnik of Digital Equipment Corporation.
This is an "accuracy above everything else" emulator, very close to
original to original thing.
PDP-10
PDP-10 is the machine that made timesharing real. It looms large in
hacker folklore because of its adoption in the mid-1970s by many
university computing facilities and research labs, including the MIT
AI Lab, Stanford, and CMU. Some aspects of the instruction set (most
notably the bit-field instructions) are still considered unsurpassed.
The 10 was eventually eclipsed by the VAX machines (descendants of the
PDP-11) when DEC recognized that the 10 and VAX product lines were
competing with each other and decided to concentrate its software
development effort on the more profitable VAX. The machine was finally
dropped from DEC's line in 1983, following the failure of the Jupiter
Project at DEC to build a viable new model.
PDP-10 archive at sunsite.unc.edu.
PDP-11
(Provided by Megan Gentry [gentry@zk3.dec.com],
John Wilson [wilsonj@rpi.edu], and other people)
The PDP-11 was, and is an extremely successful and influential
family of machines which was spanned in two decades from the early
1970s to the early/mid 1990s.
PDP-11 FAQ list.
PDP-11 archive at sunsite.unc.edu.
PDP-11 software at ftp.update.uu.se.
PDP-11 software at shop-pdp.kent.edu.
- Ersatz-11 [IBM PC]
PDP-11/34a (other CPUs in next release) emulator, RL01/RL02 hard disks,
RX01/RX02 floppies, 16 TTY lines (VT100 emulation and/or COM ports).
New release soon, will include FPP (using math co), RK06/RK07 disks,
LP11s, configurable CPU type. Ersatz-11 is written by John Wilson
in 80x86 assembly and author says that it is the fastest emulator that
will run on Intel PCs (faster than the real thing when run on a fast
486).
- Russian emulator [IBM PC]
This emulator for IBM PC was written by ??? [asd@holo.simbirsk.su].
The limited version of the emulator is provided above. The full version
supports several different disk formats and external emulations for IO
devices.
- PDP11 emulator [Unix]
- Emulator by Robert Supnik [Unix]
These are actually C sources for two emulators (PDP-8 and PDP-11)
written by Robert Supnik of Digital Equipment Corporation.
Emulates J-11 CPU, RK05/RL01/RL02 hard disks, RX01 floppy, 1 TTY line,
paper tape are emulated. This is an "accuracy above everything else"
emulator, very close to original thing.
- Emulator by Eric Edwards [Unix]
Emulates 11/35 CPU (?), RL01/RL02 hard disks, TM11 tape, etc.
- Emulator by der Mouse [Unix]
Emulates J-11 without FP instructions, RK03 hard disks, etc.
- Charon-11 Emulator
PDP-20
The most famous computer that never was. PDP-10 computers running the
TOPS-10 operating system were labeled `DECsystem-10' as a way of
differentiating them from the PDP-11. Later on, those systems running
TOPS-20 were labeled `DECSYSTEM-20' (the block capitals being the result
of a lawsuit brought against DEC by Singer, which once made a computer
called `system-10'), but contrary to popular lore there was never a
`PDP-20'; the only difference between a 10 and a 20 was the operating
system and the color of the paint. Most (but not all) machines sold to
run TOPS-10 were painted `Basil Blue', whereas most TOPS-20 machines were
painted `Chinese Red' (often mistakenly called orange).