US3582906A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-speed dc interlocked communication system interface
Assignee: International Business Machines Corp
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Filing: 1969-06-27
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Granted: 1971-06-01
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Expires: 1989-06-27
Abstract
Abstract A communication system which connects input/output (I/O) devices of different data rates with a data processing system. Transfer of the first byte of data to the data processing system from an I/O device is synchronized with the rise of an inbound tag from the I/O device. Receipt of the first byte by the data processing system is signalled by raising the outbound tag, following which the device drops the inbound tag. Transfer of the second byte from the I/O device is synchronized with the rise of a data in tag. Receipt of the second byte is signalled by raising the data out tag. The outbound tag is dropped after the inbound tag has dropped. The data out tag is dropped after the data in tag has dropped. Transfer of data to the device from the data processing system utilizes the same sequence, however, transfer of the first byte is synchronized with the rise of the outbound tag and transfer of the second byte is synchronized with the rise of data out.
Inventors
- 👤 William F Beausoleil
- 👤 Paul J Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:16
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/42; G06F13/4265; G06F13/4269
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
143 words
In a demand-response interface in which one terminal is capable of demanding data from another terminal by energizing a first demand line connecting the two terminals and in which a first byte of data is transferred to the one terminal by the other terminal in synchronizaTion with the energization of a first response line connecting the two terminals and energizable by said other terminal and wherein receipt of the data is signalled by said one terminal by deenergizing said first demand line, the improvement wherein a second byte of data is transferred comprising: first means responsive to the deenergization of said first demand line for interpreting said deenergization as a request for a second byte of data; and second means responsive to said first means for synchronizing the transfer of said second byte of data upon the deenergization of said first demand line.
Claim 2
Dependent Claim
143 words
In a demand-response interface in which one terminal is capable of demanding data from another terminal by energizing a first demand line connecting the two terminals and in which a first byte of data is transferred to the one terminal by the other terminal in synchronizaTion with the energization of a first response line connecting the two terminals and energizable by said other terminal and wherein receipt of the data is signalled by said one terminal by deenergizing said first demand line, the improvement wherein a second byte of data is transferred comprising: first means responsive to the deenergization of said first demand line for interpreting said deenergization as a request for a second byte of data; and second means responsive to said first means for synchronizing the transfer of said second byte of data upon the deenergization of said first demand line.
Claim 3
Dependent Claim
73 words
The combination according to claim 1 wherein said first means includes means for energizing a second demand line energizable following the deenergization of said first demand line for demanding the transfer of a second byte of data from the other terminal and wherein said second means includes means for energizing a second response line responsive to a signal on said first demand line for synchronizing the transfer of said second byte of data.
Claim 4
Dependent Claim
65 words
The combination according to claim 1 wherein said first byte of data is transferred from said one terminal to said other terminal by making said first byte of data available to said other terminal concurrently with the energization of said first demand line, and second second byte of data is made available to said other terminal concurrently with the deenergization of said first demand line.
Claim 5
Dependent Claim
62 words
The combination according to claim 1 wherein a first byte of data is transferred from said other terminal to said one terminal by making said data available to said one terminal concurrently with the energization of said first response line, and a second byte of data is made available to said one terminal concurrently with the deenergization of said first response line.
Claim 6
Dependent Claim
65 words
The combination according to claim 2 wherein said first byte of data is transferred from said one terminal to said other terminal by making said first byte of data available to said other terminal concurrently with the energization of said first demand line, and said second byte of data is made available to said other terminal concurrently with the energization of said second demand line.
Claim 7
Dependent Claim
62 words
The combination according to claim 2 wherein a first byte of data is transferred from said other terminal to said one terminal by making said data available to said one terminal concurrently with the energization of said first response line, and a second byte of data is made available to said one terminal concurrently with the energization of said second response line.
Claim 8
Dependent Claim
161 words
For use with a demand-response interface in which one terminal is capable of demanding data from another terminal by energizing a first demand line connecting the two terminals and in which data is transferred to the one terminal by the other terminal in synchronization with a signal on a first response line connecting the two terminals and energizable by said other terminal and wherein receipt of the data is signalled by said one terminal by deenergizing said first demand line, the improvement wherein a second pair of demand and response lines are utilized overlapping the operation of said first pair of demand-response lines for further data transfer comprising, in said one terminal: means for energizing a second demand line energizable following the deenergization of said first demand line for demanding the transfer of further data from the other terminal and means for energizing a second response line responsive to said second demand line for synchronizing the transfer of said further data.
Claim 9
Dependent Claim
161 words
For use with a demand-response interface in which one terminal is capable of demanding data from another terminal by energizing a first demand line connecting the two terminals and in which data is transferred to the one terminal by the other terminal in synchronization with a signal on a first response line connecting the two terminals and energizable by said other terminal and wherein receipt of the data is signalled by said one terminal by deenergizing said first demand line, the improvement wherein a second pair of demand and response lines are utilized overlapping the operation of said first pair of demand-response lines for further data transfer comprising, in said one terminal: means for energizing a second demand line energizable following the deenergization of said first demand line for demanding the transfer of further data from the other terminal and means for energizing a second response line responsive to said second demand line for synchronizing the transfer of said further data.
Claim 10
Dependent Claim
65 words
The combination according to claim 7 wherein a first byte of data is transferred from said one terminal to said other terminal by making said first byte of data available to said other terminal concurrently with the energization of said first demand line, and a second byte of data is made available to said other terminal concurrently with the energization of said second demand line.
Claim 11
Dependent Claim
62 words
The coMbination according to claim 7 wherein a first byte of data is transferred from said other terminal to said one terminal by making said data available to said one terminal concurrently with the energization of said first response line, and a second byte of data is made available to said one terminal concurrently with the energization of said second response line.
Claim 12
Dependent Claim
197 words
In a communication system including a first terminal and a second terminal, bus out means for transmitting data from said first terminal to said second terminal, bus in means for transmitting data from said second terminal to said first terminal; means for energizing an outbound tag for indicating that data has been placed on said bus out means by said first terminal; means for energizing an inbound tag for indicating that data has been placed on said bus in by said second terminal; said outbound tag energizing means being further responsive to energization of said inbound tag for indicating that data has been received by said first terminal over said bus in; said inbound tag energizing means being further responsive to energization of said outbound tag for indicating that data has been received by said second terminal over said bus out; the improvement comprising: additional outbound tag means for energizing an additional outbound tag for indicating that additional data has been placed on said bus out means by said first terminal; and additional inbound tag means for energizing an inbound tag for indicating that additional data has been placed on said bus in by said second terminal.
Claim 13
Dependent Claim
197 words
In a communication system including a first terminal and a second terminal, bus out means for transmitting data from said first terminal to said second terminal, bus in means for transmitting data from said second terminal to said first terminal; means for energizing an outbound tag for indicating that data has been placed on said bus out means by said first terminal; means for energizing an inbound tag for indicating that data has been placed on said bus in by said second terminal; said outbound tag energizing means being further responsive to energization of said inbound tag for indicating that data has been received by said first terminal over said bus in; said inbound tag energizing means being further responsive to energization of said outbound tag for indicating that data has been received by said second terminal over said bus out; the improvement comprising: additional outbound tag means for energizing an additional outbound tag for indicating that additional data has been placed on said bus out means by said first terminal; and additional inbound tag means for energizing an inbound tag for indicating that additional data has been placed on said bus in by said second terminal.
Claim 14
Dependent Claim
71 words
The combination of claim 10 wherein said additional outbound tag energizing means is responsive to energization of said additional inbound tag for indicating that said additional data has been received by said first terminal over said bus in; and said additional inbound tag energizing means is responsive to energization of said additional outbound tag for indicating that said additional data has been received by said second terminal over said bus out.
Claim 15
Dependent Claim
194 words
In a communication system in which a demand-response interface between a first and second terminal controls the transfer of control and data information over a data bus by means of at least a first tag for indicating to said first terminal that information of a first manifestation has been placed on the bus by said second terminal, and a second tag energizable by the first terminal for indicating to the second terminal that said information of a first manifestation has been received by said first terminal, means for transferring information of a second manifestation comprising: third tag energizing means energizable by said second terminal for indicating that said information of a second manifestation has been placed on said bus by said second terminal, said third tag energizable upon the condition that said second tag has been energized by said first terminal to thereby assure that said information of a first manifestation has been received by said first terminal before said information of a second manifestation is transmitted thereto; and fourth tag energizing means energizable by said first terminal for indicating that said information of a second manifestation has been received by said first terminal.
Claim 16
Dependent Claim
194 words
In a communication system in which a demand-response interface between a first and second terminal controls the transfer of control and data information over a data bus by means of at least a first tag for indicating to said first terminal that information of a first manifestation has been placed on the bus by said second terminal, and a second tag energizable by the first terminal for indicating to the second terminal that said information of a first manifestation has been received by said first terminal, means for transferring information of a second manifestation comprising: third tag energizing means energizable by said second terminal for indicating that said information of a second manifestation has been placed on said bus by said second terminal, said third tag energizable upon the condition that said second tag has been energized by said first terminal to thereby assure that said information of a first manifestation has been received by said first terminal before said information of a second manifestation is transmitted thereto; and fourth tag energizing means energizable by said first terminal for indicating that said information of a second manifestation has been received by said first terminal.
Claim 17
Dependent Claim
15 words
The combination according to claim 7 wherein said one terminal is an input/output control unit.
Claim 18
Dependent Claim
15 words
The combination according to claim 8 wherein said one terminal is an input/output control unit.
Claim 19
Dependent Claim
15 words
The combination according to claim 9 wherein said one terminal is an input/output control unit.
References Cited (Backward Citations)
US3251040A
Cited
US3336582A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |