公开(公告)号：BR9003363A

公开(公告)日：1991-08-27

申请号：BR9003363

申请日：1990-07-13

Applicant: IBM

Inventor： BLOYD RICHARD ALLEN ,  BOWDEN JERRY DAVID ,  BOWLES DAVID JOHN ,  HAYS DOUGLAS EARL ,  HIGDON JOHN MICHAEL ,  PERKINS DONALD BYNUM JR

IPC: G06F17/21 ,  G06F17/24 ,  G06F15/20 ,  G06K15/00

公开(公告)号：DE3278520D1

公开(公告)日：1988-06-23

申请号：DE3278520

申请日：1982-07-13

Applicant: IBM

Inventor： HIGDON JOHN MICHAEL

IPC: G11C11/14 ,  G06F3/00 ,  G06F13/28

Abstract: An arrangement for incorporating a magnetic bubble memory (MBM 8) into a system having a system processor (108) and a direct access storage (RAM 112) utilizes digital command words that represent basic MBM data operations. The processor (108) controls the MBM (8) indirectly by assembling strings of command words in RAM (112) which are transferred to a control interface (115) individually by a direct memory access device (DMA, 114). The interface (115) then translates the command words into a set of control signals (132) that are applied to the drive system (132') of the MBM (8). Each string of command words preferably corresponds to a complete memory read or write operation or a major portion thereof.