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ABC - Computer
Recent Changes

2019
Dec 9 fixed broken link, thanks Matthias Goerner
2014
Oct 25 added The Quest for Linear Equation Solvers and the Invention of Electronic Digital Computing, added Oct 2014 original .doc to Table of Contents
Sept 7 added another description and simulation of ABC

2012
Jan 4Added ABC had a User

2011
Mar 15Added ABC at Computer History Museum

2010
November 3Added Debugging Computer History: My Summer with the Atanasoff-Berry Computer by Charles S. Shorb
October 14Added From the school of hard knocks
Sept 24Reworked pages and simulation software to *emphasize* INTEGER rather than floating point input, output, and scaling.
Mar 30Added Current Location and Status of the reconstructed ABC machine
Mar 21Updated ABC-Computer.html#GUI to:
- Execuitable code available to run on a PC under Windows XP
- BASIC source code available
Mar 15Added Atanasoff's algorithm a precursor to the CORTIC Algorithms ???
Mar 9Changed Graphical User Interface
- rotated bits of word to horizontal, more common presentation
- added which equations the operator reads and punches, with direction
- three speeds, step 1 bit, ABC speed - 1 drum rev/second, Fast speedvectors
Feb 26Mostly complete with Graphical User Interface
Feb 16updated spec for Graphical User Interface


If you have comments or suggestions, Send e-mail to Ed Thelen

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