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Xerox Alto Source Code Released To Public

zonker writes: In 1970, the Xerox Corporation established the Palo Alto Research Center (PARC) with the goal to develop an "architecture of information" and lay the groundwork for future electronic office products. The pioneering Alto project that began in 1972 invented or refined many of the fundamental hardware and software ideas upon which our modern devices are based, including raster displays, mouse pointing devices, direct-manipulation user interfaces, windows and menus, the first WYSIWYG word processor, and Ethernet.

The first Altos were built as research prototypes. By the fall of 1976 PARC's research was far enough along that a Xerox product group started to design products based on their prototypes. Ultimately, ~1,500 were built and deployed throughout the Xerox Corporation, as well as at universities and other sites. The Alto was never sold as a product but its legacy served as inspiration for the future.

With the permission of the Palo Alto Research Center, the Computer History Museum is pleased to make available, for non-commercial use only, snapshots of Alto source code, executables, documentation, font files, and other files from 1975 to 1987. The files are organized by the original server on which they resided at PARC that correspond to files that were restored from archive tapes. An interesting look at retro-future.

8 of 121 comments (clear)

  1. It would be interesting by msobkow · · Score: 3, Interesting

    If possible, it would be interesting to cross compile the code to a modern processor and see how fast it would fly, given the limited capabilities of hardware at the time. Remember, we're talking about 1MHz 16-20 bit processors at the time the project started, if that.

    --
    I do not fail; I succeed at finding out what does not work.
    1. Re:It would be interesting by CastrTroy · · Score: 3, Interesting

      I looks like there's a some assembly code there from my browsing, which might be difficult to cross-compile. I would guess from the age of the code that a fair amount of it is assembly code. It would be possible to run it on an emulator. Even that could yield some serious speed gains.

      --

      Anthropic principle: We see the universe the way it is because if it were different we would not be here to see it.
    2. Re:It would be interesting by frank_adrian314159 · · Score: 3, Informative

      It was a 16-bit architecture. Use the Wiki:

      Alto was a microcoded design but, unlike many computers, the microcode engine was not hidden from the programmer in a layered design. Applications such as Pinball took advantage of this to accelerate performance. The Alto had a bit-slice arithmetic logic unit (ALU) based on the Texas Instruments' 74181 chip, a ROM control store with a writable control store extension and had 128 (expandable to 512) kB of main memory organized in 16-bit words. Mass storage was provided by a hard disk drive that used a removable 2.5 MB single-platter cartridge (Diablo Systems, a company Xerox later bought) similar to those used by the IBM 2310. The base machine and one disk were housed in a cabinet about the size of a small refrigerator; one additional disk could be added in daisy-chain fashion.

      It would be relatively simple to come up with an emulator that could run well. Although I'd rather see a Dandelion clone, anyway - I knew all about the AMD 2900 series, back in the day.

      --
      That is all.
  2. Is it just me? by Anonymous Coward · · Score: 3, Insightful

    Am I the only one here that is impressed that they were able to restore the archives from tape from 40 years ago just fine? :)

    1. Re:Is it just me? by pmcjones · · Score: 3, Informative

      Actually, the original 9-track tapes were copied to 8mm cartridge tapes around 1991, and those were later copied to CD-ROM -- for more detail, see http://xeroxalto.computerhisto... .

  3. My favorite Alto application: Mazewar by OmniGeek · · Score: 3, Interesting

    In 1977 or thereabouts, I was a co-op student at Xerox' Webster, NY Research Center. At lunchtime, I had access to an Alto, and spent far too much time playing MazeWar, a networked multi-player real-time 3D-perspective game wherein the players navigated a maze (displayed as wireframe 3D with an overhead map at the side), finding other players (who appeared as giant floating eyeballs) and zapping them. Once zapped, you respawned elsewhere in the maze and attempted to sneak up on your opponent and return the favor.

    The graphics were extremely simple; there was no detail in the walls, just lines showing the edges, and player positions were limited to the center of each grid square; player movement was in discrete jumps. All of this was done to reduce the computational load for the graphics, of course. As a result, the system was very responsive, and the experience was quite immersive.

    --

    "My strength is as the strength of ten men, for I am wired to the eyeballs on espresso."
  4. Re:PARC monument by hackertourist · · Score: 3, Informative

    "On this spot, Steve Jobs bought all his good ideas."

    FTFY.

  5. Re:Apple was the real deal by kmoser · · Score: 3, Funny

    Apple invented the desktop. Xerox, Microsoft and Linux are just faggots who've stolen the idea.

    Tthe first caveman who propped up a flat rock invented the desktop. Xerox just virtualized it first.