ABC - Computer
Recent Changes
2019
2014
Dec 9 fixed broken link, thanks Matthias Goerner
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 4 Added ABC had a User
2011
Mar 15 Added ABC at Computer History Museum 2010
November 3 Added Debugging Computer History: My Summer with the Atanasoff-Berry Computer by Charles S. Shorb October 14 Added From the school of hard knocks Sept 24 Reworked pages and simulation software to *emphasize* INTEGER rather than floating point input, output, and scaling. Mar 30 Added Current Location and Status of the reconstructed ABC machine Mar 21 Updated ABC-Computer.html#GUI to: - Execuitable code available to run on a PC under Windows XP - BASIC source code available Mar 15 Added Atanasoff's algorithm a precursor to the CORTIC Algorithms ??? Mar 9 Changed 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 speedvectorsFeb 26 Mostly complete with Graphical User Interface Feb 16 updated spec for Graphical User Interface
If you have comments or suggestions, Send e-mail to Ed Thelen