DEC 36-bit computers
DEC 36-bit Computers
Note that there is not a PDP-20. The DECSYSTEM-20 is based on the PDP-10,
using either KL10 or KS10 processors.
- PDP-3 - paper design, never produced by DEC
- Type 166 processor, using DEC System Modules
- KI10 - first to use integrated circuits, and paged memory management
- KL10 - used ECL integrated circuits for high speed
- KS10 - smaller and less expensive, based on bit-slice TTL
DEC cancelled development of a higher-performance KC10 "Jupiter" CPU.
Reportedly DEC built prototypes of "Minnow", a desktop PDP-10.
- TOPS-10, originally called simply "Monitor"
- TENEX, developed at BBN, for a KA10 with a custom-built pager
- TOPS-20, based on TENEX, sometimes known as Twenex
- ITS: The Incompatible Timesharing System, from MIT
- WAITS, West-coast Alternative to ITS, from Stanford, based on an early
version of the Monitor
- TYMCOM-X, by Tymshare, based on the TOPS-10 monitor version 5.02C
DEC has made available a
for PDP-10 software. The DEC documentation on this site are available for
download only under the terms of this license.
More documentation is available from the
Bitsavers archive and from
Several PDP-10 Simulators are available.
- PDP-10 Software Archive, maintained by Tim Shoppa, includes many tape images of TOPS-10, TOPS-20, layered products, diagnostics, and DECUS collections
Other Online Resources
36bit.org home page
Last updated June 20, 2005
Copyright 1998, 2000, 2001, 2002, 2004, 2005 Eric Smith
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