GB1287657A - Apparatus for signalling peripheral unit configuration within computer system - Google Patents
Apparatus for signalling peripheral unit configuration within computer systemInfo
- Publication number
- GB1287657A GB1287657A GB1558570A GB1558570A GB1287657A GB 1287657 A GB1287657 A GB 1287657A GB 1558570 A GB1558570 A GB 1558570A GB 1558570 A GB1558570 A GB 1558570A GB 1287657 A GB1287657 A GB 1287657A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- peripheral
- signals
- decoder
- peripheral unit
- 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
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F15/00—Digital computers in general; Data processing equipment in general
- G06F15/16—Combinations of two or more digital computers each having at least an arithmetic unit, a program unit and a register, e.g. for a simultaneous processing of several programs
- G06F15/177—Initialisation or configuration control
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer And Data Communications (AREA)
- Communication Control (AREA)
Abstract
1287657 Data processing systems BURROUGHS CORP 2 April 1970 [9 July 1969] 15585/70 Heading G4A A data processing system has a high speed memory, a number of data storing peripheral units of different types, and an apparatus for providing information to the processor as to the types of peripheral unit connected in the system and whether a communication path is available to a particular unit, the apparatus including a gating circuit operative to energize one or more of a number of output lines each corresponding to a particular peripheral unit, and a comparator responsive to the presence of output signals from the gating circuit and NOT BUSY signals from corresponding peripheral unit control units to produce a signal which is passed to the processor. As described the peripherals may be magnetic tape units, printers &c. and three modes of operation are described. Interrogate peripheral unit type.-A word is placed in the A register 24 which is the top register in a stack memory. A group of bits identifying the word as an "interrogate peripheral unit type" command are decoded and used to gate via gate 26 a further group of bits in the word specifying a particular multiplexor and a channel number to the control lines of the scanbus. These bits are applied to a decoder 28 and via a gate 32 to the gating circuit 34. The gate 32 is enabled by the TYPE output of the decoder and the circuit 34 energizes one or more of its outputs 1-20 in response to the channel designation. The lines 1-20 are connected to respective printed circuit boards 36-40 which generate a coded output specifying the type of peripheral connected to the designated channel. Interrogate peripheral path.-This command verifies the availability of a designated channel. A word is loaded in the A register 24 as above and the operation is similar except that the PATH output of decoder 28 is energized. The outputs 1-20 of the gating circuit 34 pass via AND gates 42-46 respectively which are enabled by the PATH output and also by NOT BUSY signals from the control units associated with the peripherals connected to channels 1-20. The outputs of gates 42-46 are gated to the processor via gate 48. Interrogate status.-This command verifies the availability of the selected peripheral unit, the STATUS output of the decoder 28 being energized as above. A group of bits specifying one of the groups of READY lines from the peripheral units is passed to the decoder 56 which is activated in response to the STATUS output. The READY signals verify the status of the peripheral units and are utilized by the decoder 56 to generate control signals which are applied to the corresponding ones of the gates 50, 52, 54. The selected READY signals are thus gated to the processor. The system may provide for avoiding interrogation of all the READY signals by passing each group of such signals through a corresponding inverter 58, 60, 62 to the gating circuit associated with the next lower order group of READY signals. The output of the inverters indicate that none of the peripheral units is ready and a particular bit in the A-register 24 is set accordingly. The controlling program in response to setting of this bit, inhibits further interrogation.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US84039369A | 1969-07-09 | 1969-07-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1287657A true GB1287657A (en) | 1972-09-06 |
Family
ID=25282255
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1558570A Expired GB1287657A (en) | 1969-07-09 | 1970-04-02 | Apparatus for signalling peripheral unit configuration within computer system |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS511378B1 (en) |
BE (1) | BE753180A (en) |
DE (1) | DE2025672C3 (en) |
FR (1) | FR2051637B1 (en) |
GB (1) | GB1287657A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138980A (en) * | 1983-04-04 | 1984-10-31 | Mitsubishi Electric Corp | Recording medium read/write control system |
GB2235995A (en) * | 1989-09-11 | 1991-03-20 | Sun Microsystems Inc | Apparatus for read handshake in high-speed asynchronous bus interface |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2853147C2 (en) * | 1978-12-08 | 1990-02-15 | Siemens AG, 1000 Berlin und 8000 München | Data input and output arrangement |
DE3112693A1 (en) * | 1981-03-31 | 1982-10-14 | Stollmann & Co, 2000 Hamburg | MODULAR DECENTRALIZED DATA PROCESSING SYSTEM |
-
1970
- 1970-04-02 GB GB1558570A patent/GB1287657A/en not_active Expired
- 1970-05-26 DE DE19702025672 patent/DE2025672C3/en not_active Expired
- 1970-07-08 BE BE753180D patent/BE753180A/en not_active IP Right Cessation
- 1970-07-09 FR FR7025489A patent/FR2051637B1/fr not_active Expired
- 1970-07-09 JP JP5955470A patent/JPS511378B1/ja active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2138980A (en) * | 1983-04-04 | 1984-10-31 | Mitsubishi Electric Corp | Recording medium read/write control system |
GB2235995A (en) * | 1989-09-11 | 1991-03-20 | Sun Microsystems Inc | Apparatus for read handshake in high-speed asynchronous bus interface |
US5079696A (en) * | 1989-09-11 | 1992-01-07 | Sun Microsystems, Inc. | Apparatus for read handshake in high-speed asynchronous bus interface |
GB2235995B (en) * | 1989-09-11 | 1993-07-28 | Sun Microsystems Inc | Apparatus for read handshake in high-speed asynchronous bus interface |
Also Published As
Publication number | Publication date |
---|---|
JPS511378B1 (en) | 1976-01-16 |
DE2025672A1 (en) | 1971-01-14 |
FR2051637A1 (en) | 1971-04-09 |
BE753180A (en) | 1970-12-16 |
DE2025672B2 (en) | 1973-12-13 |
DE2025672C3 (en) | 1979-06-21 |
FR2051637B1 (en) | 1973-04-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |