Browse Prior Art Database

Control Word Expansion

IP.com Disclosure Number: IPCOM000098511D
Original Publication Date: 1960-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Dirac, JF: AUTHOR

Abstract

Utilization of computers having a comparatively short word length is enlarged without a change in word length by combining several control words into one expanded control word.

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Control Word Expansion

Utilization of computers having a comparatively short word length is enlarged without a change in word length by combining several control words into one expanded control word.

A number of control words in successive memory locations are successively passed by a gate set 2, 3 or 4 from the memory bus 1 into one of a plurality of trigger sets 5, 6 or 7. One bit position in each word is loaded with an index bit and receipt of that bit by a trigger set sends a signal through OR gate 8 to enable a succeeding operation. Additionally, each word includes several tag bits to indicate to a gate and memory control 9, that obtaining of control words should continue or, alternatively, that the received word completes the instruction and the next program step can be initiated.

The outputs of the sets of triggers 5, 6 and 7 may be combined as desired to provide memory addresses larger than a single word, an increased number of operation codes and combinations of other functional codes not available with single length control words.

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