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Browse Prior Art Database

Buffer System

IP.com Disclosure Number: IPCOM000098796D
Original Publication Date: 1959-Dec-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 58K

Publishing Venue

IBM

Related People

Hennis, RB: AUTHOR

Abstract

This system reads data from a record card and enters it in coded form in a magnetic core memory. The buffer comprises a magnetic core matrix having one core corresponding to each digit storage location in the multiplane memory. The buffer cores are selected by coincident current pulses in the same manner as storage locations in the memory are selected. The buffer cores have the same addresses as their corresponding memory locations and share one set of the memory address lines. As shown, the X address lines of the memory extend through the buffer before terminating. The Y address lines for the memory and the buffer are identical, but separate, to permit individual operation of either the buffer or the memory.

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Buffer System

This system reads data from a record card and enters it in coded form in a magnetic core memory. The buffer comprises a magnetic core matrix having one core corresponding to each digit storage location in the multiplane memory. The buffer cores are selected by coincident current pulses in the same manner as storage locations in the memory are selected. The buffer cores have the same addresses as their corresponding memory locations and share one set of the memory address lines. As shown, the X address lines of the memory extend through the buffer before terminating. The Y address lines for the memory and the buffer are identical, but separate, to permit individual operation of either the buffer or the memory. The sense lines for the several bit planes of the memory are all wound serially through all the buffer cores, so that the buffer cores share the memory sense amplifiers.

Each core in the buffer corresponds to a column on the card to be read and is coupled to a reading brush for the corresponding position by a line which includes a setting winding on the buffer core. As the card is read in the conventional manner, indicia passing beneath the reading brushes energize the setting windings of the buffer cores. Between card index points, the buffer cores are read out in sequence. If any core has been set at the last index point, the output therefrom during readout activates all of the sense lines and all of the sense amplifiers. An encoder, which operates in synchronism with the reading of the card, gates the outputs of certain of the sense amplifiers...