Unterschiede

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--- analyticalengine:cardhandling [2015-04-22 21:46] – Added section on card handling rainer
+++ analyticalengine:cardhandling [2015-10-22 22:33] (aktuell) – [Operation cards] rainer
@@ Zeile 13: / Zeile 13: @@
 ===== Operation cards =====
-It seems fairly clear, that the operation cards just set the mill to one out of four arithmetic modes, and that the operation cards never start an action of the mill: >The Operation-cards merely determine the succession of operations in a general manner. They in fact throw all that portion of the mechanism included in the mill into a series of different states, which we may call the adding state, or the multiplying state, &c. respectively.
+It seems fairly clear, that the operation cards just set the mill to one out of four arithmetic modes, and that the operation cards never start an action of the mill:
+>The Operation-cards merely determine the succession of operations in a general manner. They in fact throw all that portion of the mechanism included in the mill into a series of different states, which we may call the adding state, or the multiplying state, &c. respectively.
 Throughout the text, it is often stressed that only a few operation cards are needed. This seems to be rather strange, as the operation cards are at most 25% of all cards, and they are small, as at most four holes are needed.
@@ Zeile 26: / Zeile 27: @@
 Each also comes – only hinted in the //Sketch//  – for two destinations (normal and primed ingress) as well as sources, and the Supplying cards also may either leave the storage cell cleared, or have the value restored (see [[:analyticalengine:destructiveload|Destructive and retaining ingress operation]]).
-As the mill has no unary operations, in every operation of the mill, two Supplying-cards and one Receiving-card is needed (unless the result is only needed to control a loop). Moreover, more than one receiving card may be used after the operation of the mill (Line 1 in the table for the calculation of Bernoulli's numbers).
+As the mill has no unary operations, in every operation of the mill, two Supplying-cards and one Receiving-card is needed (unless the result is only needed to control a loop). Moreover, more than one receiving card may be used after the operation of the mill (Line 1 in the table for the calculation of Bernoulli's numbers).  Additional cards are needed for multiply and divide when a double precision operand/result is required.
+A hard to understand remark is: >It should be understood that the Variable-cards are not placed in immediate contiguity with the columns. Each card is connected by means of wires with the column it is intended to act upon.  This simply refers to what we might call the "address decoder".  Cards were physically applied at a single location then the information they contained was distributed by control linkages to select the physical columns in the store.  There is nothing mystical here.
-A hard to understand remark is: >It should be understood that the Variable-cards are not placed in immediate contiguity with the columns. Each card is connected by means of wires with the column it is intended to act upon.
 ===== Number Cards =====