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Data Buffers

IP.com Disclosure Number: IPCOM000090066D
Original Publication Date: 1969-Jan-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 37K

Publishing Venue

IBM

Related People

Bliss, BE: AUTHOR [+2]

Abstract

Each data buffer DB1 and DB2 buffers the sequential transfer of a series of data words. DB1 includes a monolithic storage device divided into two areas, data and address. Each word location within the address area stores the location of the next address. A single storage address register SAR1 operates both areas and it contains a high-order bit which when set, accesses the address area and which when unset accesses the data area. The remaining positions of SAR1 store the address of a word within a given area.

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Data Buffers

Each data buffer DB1 and DB2 buffers the sequential transfer of a series of data words. DB1 includes a monolithic storage device divided into two areas, data and address. Each word location within the address area stores the location of the next address. A single storage address register SAR1 operates both areas and it contains a high-order bit which when set, accesses the address area and which when unset accesses the data area. The remaining positions of SAR1 store the address of a word within a given area.

In operation, the address area of DB1 is initially loaded with the appropriate addresses for buffering the data words. For example it can be desired to fill each word location of a data area in series. Thus, within the address area, each word location contains the address of the next higher word. When the first data word arrives, DB1 is cycled to write data at the initial word location. Then, using the same address, the address area is accessed at the word location to read out the address of the next location which is fed back by line 2 and placed in SAR1. As subsequent data words arrive, the process is repeated until the data area is filled as desired. Later, the data area can be read out in a similar manner by alternately accessing the data and address areas.

DB2 is similar to DB1 in that it includes a storage device divided into the data and address areas. It is dissimilar in that a single storage address register SAR2 is arranged to access b...