GB1083171A - Improvements in or relating to data processing apparatus - Google Patents

Improvements in or relating to data processing apparatus

Info

Publication number
GB1083171A
GB1083171A GB16743/65A GB1674365A GB1083171A GB 1083171 A GB1083171 A GB 1083171A GB 16743/65 A GB16743/65 A GB 16743/65A GB 1674365 A GB1674365 A GB 1674365A GB 1083171 A GB1083171 A GB 1083171A
Authority
GB
United Kingdom
Prior art keywords
tape
unit
units
control
byte
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.)
Expired
Application number
GB16743/65A
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 GB1083171A publication Critical patent/GB1083171A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30094—Condition code generation, e.g. Carry, Zero flag
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/30003—Arrangements for executing specific machine instructions
    • G06F9/3005—Arrangements for executing specific machine instructions to perform operations for flow control
    • G06F9/30058—Conditional branch instructions
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0673—Single storage device
    • G06F3/0682—Tape device

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Electronic Switches (AREA)

Abstract

1,083,171. Control of input/output equipment. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 21, 1965 [April 27, 1964], No. 16743/65. Heading G4A. In data processing apparatus, any one of a plurality of input/output (I/O) units can be connected to any one of a plurality of I/O control units through control and data lines by electronic and relay switches respectively when said switches, which are respective to the pair of units, are actuated by the I/O control unit. Selection in this way of one I/O unit by an I/O control unit prevents subsequent selection of the same I/O unit by another I/O control unit until it is free. In the particular embodiment, a computer sends a 9-bit byte (includes parity bit) to one of four " tape control " units to cause it to select one of 16 magnetic tape I/O units. Four of the bits of the byte identify the tape I/O unit, one of these bits (" high order " bit) choosing one set of 8 tape units and the other 3 bits being decoded into a 1-out-of-8 energization to choose one tape unit within that set. By means of switches, the two subsets of 4 tape units within each set may be effectively interchanged (" swapped "). Two further switches enable the two sets of 8 to be effectively interchanged. Further switches enable selection of any particular tape I/O unit(s) by any particular tape control unit(s) to be prevented. When a " tape control " unit has selected a tape I/O unit, command, " sense " (see below) and data bytes (the latter including a parity bit) may be passed between them. After passage of one such byte, the I/O unit is normally free to be selected by another " tape control " unit but the computer may prevent this with a "chain" " signal. The " sense " information, provided by the tape I/O unit, includes model number (indicating data rate effectively), byte size, status, whether tape file is protected &c. Effective interchange of tape units (see above) requires interchange of status lines and this is done by changing the position of a printed circuit card. Longitudinal parity check bytes may be recorded on the tape. Error correction may be done in the " tape control " units after reading from the tape.
GB16743/65A 1964-04-27 1965-04-21 Improvements in or relating to data processing apparatus Expired GB1083171A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US362710A US3372378A (en) 1964-04-27 1964-04-27 Input/output unit switch

Publications (1)

Publication Number Publication Date
GB1083171A true GB1083171A (en) 1967-09-13

Family

ID=23427215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16743/65A Expired GB1083171A (en) 1964-04-27 1965-04-21 Improvements in or relating to data processing apparatus

Country Status (6)

Country Link
US (1) US3372378A (en)
CH (1) CH432067A (en)
DE (1) DE1574590B2 (en)
GB (1) GB1083171A (en)
NL (1) NL154342B (en)
SE (1) SE329515B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1056629A (en) * 1965-10-01 1967-01-25 Creed & Co Ltd Improvements in data processing systems and equipment
US3593302A (en) * 1967-03-31 1971-07-13 Nippon Electric Co Periphery-control-units switching device
US3731217A (en) * 1970-04-03 1973-05-01 Research Corp Quasi-optical signal processing utilizing hybrid matrices
US3668651A (en) * 1970-12-30 1972-06-06 Ibm Working device code method of i/o control
DE2202658C2 (en) * 1972-01-20 1985-05-15 Allen Organ Co., 18062 Macungie, Pa. Electronic keyboard musical instrument - has switching matrix on keyboard output controlling TDM generation and control of output tones
DE2442990B2 (en) * 1974-09-07 1978-03-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Computer system with peripheral devices
US4155117A (en) * 1977-07-28 1979-05-15 International Business Machines Corporation Synchronizing channel-to-channel adapter

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3200380A (en) * 1961-02-16 1965-08-10 Burroughs Corp Data processing system
US3226688A (en) * 1961-07-03 1965-12-28 Bunker Ramo Modular computer system

Also Published As

Publication number Publication date
CH432067A (en) 1967-03-15
NL6505325A (en) 1965-10-28
DE1574590B2 (en) 1974-01-10
US3372378A (en) 1968-03-05
NL154342B (en) 1977-08-15
DE1574590A1 (en) 1972-04-06
SE329515B (en) 1970-10-12

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