https://glaschick.de/rclab/ 2026-06-12T10:35:15+00:00 https://glaschick.de/rclab/ https://glaschick.de/rclab/lib/tpl/dokubook/images/favicon.ico text/html 2015-04-21T17:06:09+00:00 Anonymous (anonymous@undisclosed.example.com) https://glaschick.de/rclab/talk/analyticalengine/bernoullinumbercalculation?do=revisions&rev=1429628769 As a starting point for discussion, here is a copy of the thoughts I sent to Doron, initiated by the observation relating to note G. Some of this probably need splitting off into sub-topics: Doron, Here are some thoughts relating to control mechanisms as they may pertain to the issue Rainer has raised. Bear in mind, that these thoughts are largely off the top of my head at this point, and while everything is based on things I have read in the primary sources over the last few years, I m… text/html 2015-04-23T03:49:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://glaschick.de/rclab/talk/analyticalengine/cardhandling?do=revisions&rev=1429753781 The control between normal and primed axes is I believe under the control of the microcode, not the cards themselves (refer to Bromley's detailed analysis). One of the masterful aspects of the later AE designs were the multiple communicating state machines on separate barrels which managed the ingress, egress, and mill axes. See particularly the pipelined multiple add/subtract operation. text/html 2015-04-23T04:13:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://glaschick.de/rclab/talk/analyticalengine/destructiveload?do=revisions&rev=1429755209 In the Mill, the columns had either two or four wheels per cage (depending on the version, but later designs had two). They were equivalent, and microcode typically had to keep track of which set held the value at any given time. Then in principle it's possible to make any transfer non destructive by simply grabbing a copy on the alternate set of wheels. This is what makes the split communicating state machine control in the mill so ingenious. Without it, when multiple axes are involved, the… text/html 2015-04-20T19:42:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://glaschick.de/rclab/talk/analyticalengine/typos?do=revisions&rev=1429551727 page 726 On top of page 726, the Coefficients A0, A1 etc are mentioned to be functions of n, but this is not shown. Needs deeper explanation. (Rainer) text/html 2015-04-24T13:41:23+00:00 Anonymous (anonymous@undisclosed.example.com) https://glaschick.de/rclab/talk/analyticalengine/whichcomplement?do=revisions&rev=1429875683 For add and subtract, the variables read from the store were converted from sign magnitude to 10's complement on passing through the ingress axis and the result converted back to sign magnitude at the egress axis, So at least at the point where addition takes place there is only one form of zero text/html 2015-04-23T16:10:06+00:00 Anonymous (anonymous@undisclosed.example.com) https://glaschick.de/rclab/talk/analyticalengine/zeroingtemporaries?do=revisions&rev=1429798206 As with everything related to the Analytical Engine, you have to consider it as a function of time. The Engine was constantly evolving. In the Early versions the store was limited in size, wrapped around the same large circular wheels as the mill. Any transfer from one column to another left the source column at zero and retaining a value required an explicit copying and restoration action.