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Defined Modes and Diagnostics for Stored Logic Recognition Processor

IP.com Disclosure Number: IPCOM000075390D
Original Publication Date: 1971-Sep-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Dorr, RL: AUTHOR

Abstract

Alteration of a stored processor program is accomplished by selectively skipping decision functions or control operations dependent on a preset mode. Part of the control word cycle then is used to determine whether or not the succeeding decision function will be processed. For example, if a document field contains alphabetic characters only (alpha-defined mode) some decision functions are numeric characters and are not evaluated. In such a case, those decision functions within the alphabetic logic used for inhibiting numeric characters would be skipped (FIG. 1).

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Defined Modes and Diagnostics for Stored Logic Recognition Processor

Alteration of a stored processor program is accomplished by selectively skipping decision functions or control operations dependent on a preset mode. Part of the control word cycle then is used to determine whether or not the succeeding decision function will be processed. For example, if a document field contains alphabetic characters only (alpha-defined mode) some decision functions are numeric characters and are not evaluated. In such a case, those decision functions within the alphabetic logic used for inhibiting numeric characters would be skipped (FIG. 1).

Selectively skipping control words for branching (set ID and branch, or unconditional branch), character logics can be logically ORed. For example, the logic of the number "5" is ORed with alphabetic "S" and called a "5" in numeric- defined modes and an "S" in alpha-defined modes.

Flag bits are used in the control word with one exclusive bit for each mode. When the particular mode is defined and the corresponding recognition mode bit in the control word is set to "1", two operations are possible, depending on the operation code of the control word: (1) the succeeding decision function is skipped by immediately selecting the "branch on true" field (B1) address, and proceeding to the control word to be evaluated, or (2) the particular control word used for a control operation only is ignored. The processor then proceeds to the next sequent...