An emulator for the hardware that ran the Multics operating system.

Most documentation is on the project wiki at
https://github.com/MichaelMondy/multics-emul/wiki

6502.org is a resource for people interested in building hardware or writing software for the 6502 microprocessor and its relatives.

We continually strive to remain the largest and most complete source for 6502-related information in the world. This includes everything from articles and project descriptions to schematics and source code.

JEROME H. SALTZER, SENIOR MEMBER, IEEE, AND
MICHAEL D. SCHROEDER, MEMBER, IEEE
Invited Paper

Manuscript received October 11, 1974; revised April 17. 1975. Copyright © 1975 by J. H. Saltzer.
The authors are with Project MAC and the Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology Cambridge, Mass. 02139.

Abstract - This tutorial paper explores the mechanics of protecting computer-stored information from unauthorized use or modification. It concentrates on those architectural structures--whether hardware or software--that are necessary to support information protection. The paper develops in three main sections. Section I describes desired functions, design principles, and examples of elementary protection and authentication mechanisms. Any reader familiar with computers should find the first section to be reasonably accessible. Section II requires some familiarity with descriptor-based computer architecture. It examines in depth the principles of modern protection architectures and the relation between capability systems and access control list systems, and ends with a brief analysis of protected subsystems and protected objects. The reader who is dismayed by either the prerequisites or the level of detail in the second section may wish to skip to Section III, which reviews the state of the art and current research projects and provides suggestions for further reading.

Another emulator for the pdp11/70 written in Javascript. While it ist far from perfect according to the author, it has a nice front panel.

Article about the continued use of Fortran in scientific computing and a few candidates for successors (Haskell, Clojure and Julia).

Computer history collections: PDP-10 archive (includes the TECO Emacs), SIMH the computer history simulator and a copy of bitsavers, which contains lots of software and high-resolution scans of many documents (including e.g. data books of electronic parts).

Arguments for v7 vs v6.

Realistic software simulation of a given Blinkenlight panel

Nice diagrams showing the histories of programming languanges and Unix-like operating systems.

This website describes PDP2011 – a re-creation of the well known series of PDP-11 computer systems in VHDL. Everything that is needed to run a complete PDP-11 system is included; you can run a complete Unibus PDP-11 system with console, disks and other peripherals on a simple low cost FPGA development board. The original V5-V7 versions of Unix, BSD 2.11, and the original DEC operating systems for the PDP-11 work.