IT1111222B - Unita' d'espansore con accesso diretto a memoria per l'uso in un microelaboratore - Google Patents

Unita' d'espansore con accesso diretto a memoria per l'uso in un microelaboratore

Info

Publication number
IT1111222B
IT1111222B IT21611/79A IT2161179A IT1111222B IT 1111222 B IT1111222 B IT 1111222B IT 21611/79 A IT21611/79 A IT 21611/79A IT 2161179 A IT2161179 A IT 2161179A IT 1111222 B IT1111222 B IT 1111222B
Authority
IT
Italy
Prior art keywords
micro
processor
memory access
direct memory
expander unit
Prior art date
Application number
IT21611/79A
Other languages
English (en)
Other versions
IT7921611A0 (it
Original Assignee
Gte Automatic Electric Lab Inc
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 Gte Automatic Electric Lab Inc filed Critical Gte Automatic Electric Lab Inc
Publication of IT7921611A0 publication Critical patent/IT7921611A0/it
Application granted granted Critical
Publication of IT1111222B publication Critical patent/IT1111222B/it

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F13/285—Halt processor DMA
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F13/16—Handling requests for interconnection or transfer for access to memory bus
    • G06F13/18—Handling requests for interconnection or transfer for access to memory bus based on priority control

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Bus Control (AREA)
IT21611/79A 1978-04-07 1979-04-05 Unita' d'espansore con accesso diretto a memoria per l'uso in un microelaboratore IT1111222B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/894,223 US4180855A (en) 1978-04-07 1978-04-07 Direct memory access expander unit for use with a microprocessor

Publications (2)

Publication Number Publication Date
IT7921611A0 IT7921611A0 (it) 1979-04-05
IT1111222B true IT1111222B (it) 1986-01-13

Family

ID=25402775

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21611/79A IT1111222B (it) 1978-04-07 1979-04-05 Unita' d'espansore con accesso diretto a memoria per l'uso in un microelaboratore

Country Status (4)

Country Link
US (1) US4180855A (it)
BE (1) BE872075A (it)
CA (1) CA1105148A (it)
IT (1) IT1111222B (it)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4348720A (en) * 1979-08-31 1982-09-07 Bell Telephone Laboratories, Incorporated Microcomputer arranged for direct memory access
US4430704A (en) 1980-01-21 1984-02-07 The United States Of America As Represented By The Secretary Of The Navy Programmable bootstrap loading system
US4482948A (en) * 1980-12-29 1984-11-13 Gte Automatic Electric Labs Inc. Microprocessor bus interchange circuit
US4843588A (en) * 1982-09-17 1989-06-27 General Electric Company Programmable radio frequency communications device capable of programming a similar device
US4528626A (en) * 1984-03-19 1985-07-09 International Business Machines Corporation Microcomputer system with bus control means for peripheral processing devices
JPH0821013B2 (ja) * 1987-05-13 1996-03-04 株式会社日立製作所 ダイレクトメモリアクセスオ−ダ競合制御方式
US5108208A (en) * 1988-12-05 1992-04-28 Gardner Michael E Allocation of memory in a font cartridge

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4075691A (en) * 1975-11-06 1978-02-21 Bunker Ramo Corporation Communication control unit
US4067059A (en) * 1976-01-29 1978-01-03 Sperry Rand Corporation Shared direct memory access controller
US4099236A (en) * 1977-05-20 1978-07-04 Intel Corporation Slave microprocessor for operation with a master microprocessor and a direct memory access controller

Also Published As

Publication number Publication date
CA1105148A (en) 1981-07-14
US4180855A (en) 1979-12-25
IT7921611A0 (it) 1979-04-05
BE872075A (fr) 1979-03-16

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