CA2065991A1 - Personal computer data transfer control - Google Patents

Personal computer data transfer control

Info

Publication number
CA2065991A1
CA2065991A1 CA2065991A CA2065991A CA2065991A1 CA 2065991 A1 CA2065991 A1 CA 2065991A1 CA 2065991 A CA2065991 A CA 2065991A CA 2065991 A CA2065991 A CA 2065991A CA 2065991 A1 CA2065991 A1 CA 2065991A1
Authority
CA
Canada
Prior art keywords
data
counter
local processor
blocks
processor bus
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2065991A
Other languages
French (fr)
Other versions
CA2065991C (en
Inventor
Don Steven Keener
Gregory James Moore
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Publication of CA2065991A1 publication Critical patent/CA2065991A1/en
Application granted granted Critical
Publication of CA2065991C publication Critical patent/CA2065991C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/14—Handling requests for interconnection or transfer
    • G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
    • G06F13/28—Handling requests for interconnection or transfer for access to input/output bus using burst mode transfer, e.g. direct memory access DMA, cycle steal

Abstract

This invention relates to personal computers, and more particularly to a personal computer using a small computer systems interface (SCSI) controller coupled directly to the local processor bus for controlling data transfer with storage memory devices such as fixed or removable media electromagnetic storage devices. The personal computer has a high speed local processor data bus and a storage controller coupled directly to said local processor bus for regulating communications between a processor and storage memory devices. The storage controller has at least one counter for tracking at least one of address and count data for blocks of data being transferred and capable of signalling through the local processor bus the state of the counter, and a bi-stable device interposed between the counter and the local processor bus for enabling delivery to the local processor bus of data representing an initial state of the counter at the beginning of a transfer of blocks of data and for continuing delivery of initial state data throughout a transfer of blocks of data. The counter and bi-stable device cooperate for permitting one of incrementing and decrementing of the counter during transfer of blocks of data while avoiding changes in counter state data delivered to the local processor bus during transfer of blocks of data.
CA002065991A 1991-06-07 1992-04-14 Personal computer data transfer control Expired - Fee Related CA2065991C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US712,237 1991-06-07
US07/712,237 US5287476A (en) 1991-06-07 1991-06-07 Personal computer system with storage controller controlling data transfer

Publications (2)

Publication Number Publication Date
CA2065991A1 true CA2065991A1 (en) 1992-12-08
CA2065991C CA2065991C (en) 1996-01-02

Family

ID=24861301

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002065991A Expired - Fee Related CA2065991C (en) 1991-06-07 1992-04-14 Personal computer data transfer control

Country Status (4)

Country Link
US (1) US5287476A (en)
EP (1) EP0517508A1 (en)
JP (1) JP2538739B2 (en)
CA (1) CA2065991C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2065989C (en) * 1991-06-07 1998-03-31 Don Steven Keener Personal computer data flow control
US5371861A (en) * 1992-09-15 1994-12-06 International Business Machines Corp. Personal computer with small computer system interface (SCSI) data flow storage controller capable of storing and processing multiple command descriptions ("threads")
US5581790A (en) * 1994-06-07 1996-12-03 Unisys Corporation Data feeder control system for performing data integrity check while transferring predetermined number of blocks with variable bytes through a selected one of many channels
EP0752664A3 (en) * 1995-07-07 2006-04-05 Sun Microsystems, Inc. Method and apparatus for reporting data transfer between hardware and software
US5734848A (en) * 1995-07-24 1998-03-31 Symbios Logic Inc. Method and appartus for transferring data in a controller having centralized memory
US5729705A (en) * 1995-07-24 1998-03-17 Symbios Logic Inc. Method and apparatus for enhancing throughput of disk array data transfers in a controller
US6496878B1 (en) 1999-11-03 2002-12-17 International Business Machines Corporation Transfer progress alert module
US6654832B1 (en) 2000-01-18 2003-11-25 Micron Technology, Inc. Method of initializing a processor and computer system
US6591318B1 (en) * 2000-01-24 2003-07-08 Micron Technology, Inc. Computer system having reduced number of bus bridge terminals
US9201790B2 (en) * 2007-10-09 2015-12-01 Seagate Technology Llc System and method of matching data rates

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1121031B (en) * 1979-09-19 1986-03-26 Olivetti & Co Spa MULTIPROCESSOR DATA PROCESSING SYSTEM
DE3043723A1 (en) * 1980-11-20 1982-06-24 Pfister Gmbh, 8900 Augsburg METHOD AND DEVICE FOR CHECKING THE FUNCTIONS OF A DISPLAY SYSTEM
US4597061B1 (en) * 1983-01-03 1998-06-09 Texas Instruments Inc Memory system using pipleline circuitry for improved system
IT1193650B (en) * 1983-01-31 1988-07-21 Honeywell Inf Systems INCREASED RELIABILITY INTERRUPTION APPARATUS
GB8432458D0 (en) * 1984-12-21 1985-02-06 Plessey Co Plc Integrated circuits
JPH01237864A (en) * 1988-03-18 1989-09-22 Fujitsu Ltd Dma transfer controller
US5187783A (en) * 1989-03-15 1993-02-16 Micral, Inc. Controller for direct memory access

Also Published As

Publication number Publication date
JP2538739B2 (en) 1996-10-02
JPH05173945A (en) 1993-07-13
EP0517508A1 (en) 1992-12-09
US5287476A (en) 1994-02-15
CA2065991C (en) 1996-01-02

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