公开(公告)号：JPH11213574A

公开(公告)日：1999-08-06

申请号：JP1574098

申请日：1998-01-28

Applicant: IBM

Inventor： TANAKA KEISUKE ,  MICHIGAMI TORU

IPC: G06F3/06 ,  G11B20/18 ,  H03M13/00

Abstract: PROBLEM TO BE SOLVED: To improve the operating efficiency of a working memory by setting two memory banks having a specific total byte length, dividing them into specific blocks having a specific by te length and dividing plural encoded data rows which are to be read out in series from a recording disk into specific byte lengths and specific blocks which are to be set in the memory banks and storing the specific blocks alternately. SOLUTION: In the case of reading out plural encoded data having a Y byte length, the right-hand side 2 ×(2m+1)of Y ×(2m+1) is divided into (2m+1) pieces of blocks and the length of each block is set to a 2 byte length, Then, in an encoded data row L01 or L04, the first block and the second block of the encoded data row L01 are respectively stored in the block A0 of a memory bank 0 and the block B0 of a memory bank 1 under the control of a buffer manager. The error correction of the encoded data row L01 is performed by taking out the block A0 of the bank 0, the block B0 of the bank 1 and the block A1 of the bank 0 alternately.

公开(公告)号：JPH10240392A

公开(公告)日：1998-09-11

申请号：JP4225597

申请日：1997-02-26

Applicant: IBM

Inventor： MICHIGAMI TORU ,  NAKAZAWA YUKIFUMI ,  NAITO ZAISEI

IPC: G06F1/26 ,  G06F1/32

Abstract: PROBLEM TO BE SOLVED: To prevent a leak current at the time of power-off concerning a remote power on/off type power supply system using a momentary switch. SOLUTION: In case of power-off, namely, in the off state of switch SW2, no power is supplied to a latch circuit 30 so that no power is consumed without fail. Besides, a switch driving circuit 40 does not originally consume power. When a user presses a momentary switch SW1 in the off state of switch SW2, the switch SW2 is turned on by the switch driving circuit 40. As a result, the latch circuit 30 can receive a driving voltage Vcc from the downstream side of switch SW2 so as to latch the on state of momentary switch SW1. When the user releases the momentary switch SW1 later, the momentary switch SW1 itself immediately recovers its original position and with this recovery, the on operation of SW2 due to the switch driving circuit 40 is stopped as well. At such a time, however, the on state of SW2 can be held by the operation of latch circuit 30 already.