Browse Prior Art Database

Automatic Generation of Address Location Table

IP.com Disclosure Number: IPCOM000096756D
Original Publication Date: 1963-Oct-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

Rice, R: AUTHOR

Abstract

The system is for the generation of a special symbolic address location table 22 in a main memory 11. This contains special symbolic record identifier symbols together with the absolute address in main memory where such record actually begins. Thus, by searching the special table, a rapid search for a given symbolically designated record is achieved without serially searching the entire memory.

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Automatic Generation of Address Location Table

The system is for the generation of a special symbolic address location table 22 in a main memory 11. This contains special symbolic record identifier symbols together with the absolute address in main memory where such record actually begins. Thus, by searching the special table, a rapid search for a given symbolically designated record is achieved without serially searching the entire memory.

In operation, data is input to the system from a standard input device, such as punched card or tape, and comes in on the designated line through input detect 10 and thence into input buffers 12 or 14. These alternate in operation for faster inputting so that when one is filled, it can be transmitting its information to memory while the second is being filled from tape. Concurrently, with the inputting of data into the system, a symbolic record character which is known to exist in the data is loaded into register 16. As each character is input to the system, it is compared through register 18 and compare circuit 20 to determine whether it is the desired record mark, which will start a new record entry in memory.

When such a character is detected, all previous data currently in memory buffer register 26 is transferred into memory 11. The new string of data beginning with the detected character is stored beginning at a new storage location. Concurrently, this character together with a number of additional significant characters...