xerox alto os

The myth says, Apple CEO Steve Jobs saw Xerox PARC product, such as to create the Apple Lisa and the original Mac OS / Macintosh GUI. Birth of the modern computer, Personal computer, Xerox Alto. the keys needed to boot for a test OS release required more fingers than you could come up with. In the Xerox Corporation, which had become very successful in used this Alto to develop portions of the Xerox Star operating system. The Xerox Alto was designed to be a relatively small, yet powerful, personal office computer with the ability to present information graphically, and to easily share. The result was the Alto computer, whose name comes from the Xerox Palo Alto but powerful enough to support a reliable, high-quality operating system and.

Xerox Alto から Mac OS X Leopard にいたる OSデザイン史 | トブ iPhone

Butler W. Lampson left photothe visioneer of Xerox Alto and Charles P. Chuck Thacker, the project leader. The Alto greatly influenced the xerox alto os of personal computers in the following decades, notably the Macintosh and the first Sun workstations.

It was not a commercial product, but several thousand units were built and were heavily used at PARC, other Xerox facilities, and at several famous universities for many years. It was not typically purchased by someone working based upon a personal budget. I was the first to implement the LAN technology, named Ethernet. The Alto was first conceived in a December memorandum written by the PARC scientist and manager Butler Lampson see the Memorandum for Xerox Altoxerox alto os requests support from the Xerox Corporation for the construction of a number of Alto personal workstations.

Manufacturing was sub-contracted to Clement Designlabs, whose team included Carl J. Clement, Ken Campbell and Fred Stengel. Due to the success of the pilot run, the team went on to produce approximately units over the next ten years. Development proceeded for the Alto for most of the s, contributing progressive new features in hardware and software. The brain of Alto was a bit-slice processor based on the Texas Instruments' chip, a ROM control store with a writable control store extension and expandable to kB of main memory.

It had a hard disk that used a removable 2. The mouse and chord keyset had been introduced by SRI's On-Line System ; while the mouse was an instant success among Alto users, the chord keyset never xerox alto os popular.

In the early mice, the buttons were three narrow bars, arranged top to bottom rather than side to side. The motion was sensed by two wheels perpendicular to each other. These were soon replaced with ball-type mice. These were photo-mechanical mice—first using white light and then using IR to count the rotations of wheels inside the mouse. The keyboard was interesting in that each key was represented as a separate bit in a set of registers.

This characteristic was used to alter where album nhaccuatui 2012 calendar Alto would boot from it could be booted from either a local disk, or the network.

The keyboard registers were used as the address on the disk to boot from, and by holding specific keys down while pressing the boot button, different microcode and operating systems could be loaded. This gave rise to the expression "nose boot" where the keys needed to boot for a test OS release required more fingers than you could come up with.

Nose boots were made obsolete xerox alto os the "move2keys" program that shifted files on the disk so that a specified key sequence could be used. By the beginning ofAltos were being utilized in four test sites: Xerox management rejected creating a commercially obtainable version of the Alto for many years. He was not impressed by the first two, but was excited by the last one, and promptly integrated it—first into the Xerox alto os Lisa and then in the Macintoshinviting several key researchers from PARC to work in his xerox alto os.

xerox alto os


  1. Fedal

    Meiner Meinung nach ist es nicht logisch