US7177970B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bus control system
Assignee: Hitachi Ltd
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Filing: 2002-10-22
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Granted: 2007-02-13
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Expires: 2022-10-22
Abstract
Abstract In a data processing system, a plurality of modules connected to a system bus thereof are assigned with identifiers. When a source module initiates a split read access to another module, the source module sends an address of the access destination module and an identifier of the source module. When sending a response to the source module, the destination module returns response data and the identifier of the source module thereto. Checking the identifier from the destination module, the source module determines the response data returned as a response to the initiated access.
Inventors
- 👤 Nobukazu Kondo
- 👤 Seiji Kaneko
- 👤 Koichi Okazawa
- 👤 Hideaki Gemma
- 👤 Tetsuya Mochida
- 👤 Takehisa Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:28
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/38; G06F13/40; G06F13/4004; G06F13/4027; G06F13/14; G06F13/36
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
100 words
An information processing system comprising: a processor; first lines coupled to said processor, said first lines capable of executing a first split transfer protocol; a device; second lines coupled to said device, said second lines capable of executing a second split transfer protocol; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is transferred via said second lines, and a second read request to said device is transferred via said second lines before a response to said first request from said device is transferred via said second lines.
Claim 2
Dependent Claim
100 words
An information processing system comprising: a processor; first lines coupled to said processor, said first lines capable of executing a first split transfer protocol; a device; second lines coupled to said device, said second lines capable of executing a second split transfer protocol; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is transferred via said second lines, and a second read request to said device is transferred via said second lines before a response to said first request from said device is transferred via said second lines.
Claim 3
Dependent Claim
16 words
An information processing system according to claim 1 , wherein said device is an I/O device.
Claim 4
Dependent Claim
25 words
An information processing system according to claim 1 , further comprising: third lines coupled to said adapter, said third lines coupled to a main memory.
Claim 5
Dependent Claim
35 words
An information processing system according to claim 1 , wherein said processor sends said first read request, and said second read request to said device via said first lines, said adapter, and said second lines.
Claim 6
Dependent Claim
94 words
An information processing system comprising: a processor; first lines coupled to said processor; a device; second lines coupled to said device, said second lines employing a split transfer protocol; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is transferred from said adapter through said second lines, and second read request to said device is transferred from said adapter from said second lines before a response to said first request is transferred from said device via said second lines to said adapter.
Claim 7
Dependent Claim
94 words
An information processing system comprising: a processor; first lines coupled to said processor; a device; second lines coupled to said device, said second lines employing a split transfer protocol; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is transferred from said adapter through said second lines, and second read request to said device is transferred from said adapter from said second lines before a response to said first request is transferred from said device via said second lines to said adapter.
Claim 8
Dependent Claim
16 words
An information processing system according to claim 5 , wherein said device is an I/O device.
Claim 9
Dependent Claim
26 words
An information processing system according to claim 5 , further comprising: third lines coupled to said adapter, said third lines being coupled to a main memory.
Claim 10
Dependent Claim
34 words
An information processing system according to claim 5 , wherein said processor sends first read request, and said second read request to said device via said first lines, said adapter, and said second lines.
Claim 11
Dependent Claim
98 words
An information processing system comprising: a processor; first lines coupled to said processor; a device; second lines coupled to said device; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is transferred from said processor via said first lines, said adapter, and said second lines, and second read request to said device is transferred from said processor via said first lines, said adapter, and said second lines before a response to said first request from said device is transferred via said second lines to said adapter.
Claim 12
Dependent Claim
98 words
An information processing system comprising: a processor; first lines coupled to said processor; a device; second lines coupled to said device; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is transferred from said processor via said first lines, said adapter, and said second lines, and second read request to said device is transferred from said processor via said first lines, said adapter, and said second lines before a response to said first request from said device is transferred via said second lines to said adapter.
Claim 13
Dependent Claim
16 words
An information processing system according to claim 9 , wherein said device is an I/O device.
Claim 14
Dependent Claim
26 words
An information processing system according to claim 9 , further comprising: third lines coupled to said adapter, said third lines being coupled to a main memory.
Claim 15
Dependent Claim
75 words
An information processing system comprising: a processor; first lines coupled to said processor; a device; second lines coupled to said device; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is through said second lines, and said device receives a second read request on said second lines before a response to said first request from said device is transferred through said second lines.
Claim 16
Dependent Claim
75 words
An information processing system comprising: a processor; first lines coupled to said processor; a device; second lines coupled to said device; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request to said device is through said second lines, and said device receives a second read request on said second lines before a response to said first request from said device is transferred through said second lines.
Claim 17
Dependent Claim
16 words
An information processing system according to claim 12 , wherein said device is an I/O device.
Claim 18
Dependent Claim
26 words
An information processing system according to claim 12 , further comprising: third lines coupled to said adapter, said third lines being coupled to a main memory.
Claim 19
Dependent Claim
26 words
An information processing system according to claim 12 , wherein said processor sends first read request through said first lines, said adapter, and said second lines.
Claim 20
Dependent Claim
113 words
An information processing system comprising: a processor; first lines coupled to said processor, said first lines capable of executing a first split transfer protocol; second lines coupled to said device, said second lines capable of executing a second split transfer protocol, a main memory; third lines coupled to said main memory; and an adapter for coupling said first lines, said second lines, and said third lines, wherein a first read request to said device is transferred through said second lines, and a second read request to said device is transferred through said second lines before a response to said first request from said device is transferred through said second lines to said adapter.
Claim 21
Dependent Claim
113 words
An information processing system comprising: a processor; first lines coupled to said processor, said first lines capable of executing a first split transfer protocol; second lines coupled to said device, said second lines capable of executing a second split transfer protocol, a main memory; third lines coupled to said main memory; and an adapter for coupling said first lines, said second lines, and said third lines, wherein a first read request to said device is transferred through said second lines, and a second read request to said device is transferred through said second lines before a response to said first request from said device is transferred through said second lines to said adapter.
Claim 22
Dependent Claim
16 words
An information processing system according to claim 16 , wherein said device is an I/O device.
Claim 23
Dependent Claim
35 words
An information processing system according to claim 16 , wherein said processor sends said first read request, and said second read request to said device through said first lines, said adapter, and said second lines.
Claim 24
Dependent Claim
105 words
An information processing system comprising: first lines coupled to a processor, said first lines capable of executing a first split transfer protocol; second lines coupled to a device, said second lines capable of executing a second split transfer protocol, third lines coupled to said main memory; and an adapter for coupling said first lines, said second lines, and said third lines, wherein a first read request to said device is transferred through said second lines, and a second read request to said device is transferred through said second lines before a response to said first request from said device is transferred through said second lines.
Claim 25
Dependent Claim
105 words
An information processing system comprising: first lines coupled to a processor, said first lines capable of executing a first split transfer protocol; second lines coupled to a device, said second lines capable of executing a second split transfer protocol, third lines coupled to said main memory; and an adapter for coupling said first lines, said second lines, and said third lines, wherein a first read request to said device is transferred through said second lines, and a second read request to said device is transferred through said second lines before a response to said first request from said device is transferred through said second lines.
Claim 26
Dependent Claim
16 words
An information processing system according to claim 19 , wherein said device is an I/O device.
Claim 27
Dependent Claim
35 words
An information processing system according to claim 19 , wherein said processor sends said first read request, and said second read request to said device via said first lines, said adapter, and said second lines.
Claim 28
Dependent Claim
88 words
An information processing system comprising: a processor; first lines coupled to said processor; a device second lines coupled to said device; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request from said processor to said device is transferred through said first lines, said adapter, and said second lines, and said device receives a second read request on said second lines before a response to said first request from said device is transferred through said second lines to said adapter.
Claim 29
Dependent Claim
88 words
An information processing system comprising: a processor; first lines coupled to said processor; a device second lines coupled to said device; and an adapter for hierarchically coupling said first lines, and said second lines, wherein a first read request from said processor to said device is transferred through said first lines, said adapter, and said second lines, and said device receives a second read request on said second lines before a response to said first request from said device is transferred through said second lines to said adapter.
Claim 30
Dependent Claim
16 words
An information processing system according to claim 22 , wherein said device is an I/O device.
Claim 31
Dependent Claim
26 words
An information processing system according to claim 22 , further comprising: third lines coupled to said adapter, said third lines being coupled to a main memory.
References Cited (Backward Citations)
US3997896A
Cited
US4128883A
Cited
US4290102A
Cited
US4232366A
Cited
US4281380A
Cited
US4543628A
Cited
US4821174A
Cited
US4672662A
Cited
US4941088A
Cited
US4797815A
Cited
US4785394A
Cited
US5146597A
Cited
US4953072A
Cited
JPH01161461A
Cited
US5001625A
Cited
US5235684A
Cited
JPH02161551A
Cited
JPH03102558A
Cited
US5274787A
Cited
JPH03222543A
Cited
JPH03278156A
Cited
JPH03288957A
Cited
US5483642A
Cited
US5237567A
Cited
US5191649A
Cited
US5414820A
Cited
US5341495A
Cited
US5594880A
Cited
US6128688A
Cited
US5388224A
Cited
US5379384A
Cited
US6584538B2
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2010-02-12 | 2010-08-14 | 2011-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-02-12 | 2014-08-14 | 2015-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-02-12 | 2018-08-14 | 2019-02-13 | $7700.00 | Window Closed / Lapsed |