US5083263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
BISC with interconnected register ring and selectively operating portion of the ring as a conventional computer
Assignee: Sun Microsystems Inc
•
Filing: 1988-07-28
•
Granted: 1992-01-21
•
Expires: 2008-07-28
Abstract
Abstract An integer processing unit for a reduced instruction set computer having a plurality of registers arranged in groups referred to as register windows, each window register group including a number of input registers, a similar number of output registers, and a number of local registers, the register window groups being physically arranged so the input registers of each group are the same physical register as the output registers of the next adjacent register window group thereby forming one large interconnected ring of register window groups, an arrangement for designating the register window group presently active, and an arrangement for designating register window groups which are not available for use.
Inventors
- 👤 William Joy
- 👤 Robert B. Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:12
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/46; G06F9/461; G06F9/462; G06F9/30; G06F9/30098; G06F9/3012; G06F9/30123; G06F9/30127
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
An integer processing unit for a reduced instruction set computer comprising a plurality of physical registers arranged in groups, each of said register groups comprising a number of input registers, a similar number of output registers, and a number of local registers, said register groups being physically arranged such that the input registers of each group are the same registers as the output registers of the next adjacent register group thereby forming an interconnected ring of register groups, means for designating the register group presently active, and means for selecting individual register groups to operate as a conventional computer by selectively isolating the selected individual register groups from the remainder of the register groups.
Claim 2
Dependent Claim
114 words
An integer processing unit for a reduced instruction set computer comprising a plurality of physical registers arranged in groups, each of said register groups comprising a number of input registers, a similar number of output registers, and a number of local registers, said register groups being physically arranged such that the input registers of each group are the same registers as the output registers of the next adjacent register group thereby forming an interconnected ring of register groups, means for designating the register group presently active, and means for selecting individual register groups to operate as a conventional computer by selectively isolating the selected individual register groups from the remainder of the register groups.
Claim 3
Dependent Claim
79 words
An integer processing unit for a reduced instruction set computer as claimed in claim 1 in which the means for selecting individual register groups to operate as a conventional computer by selectively isolating the selected individual register groups from the remainder of the register groups comprises a register for storing indications of the status of all register groups, and means for disabling register groups adjacent any selected individual register group selectively isolated from the remainder of the register groups.
Claim 4
Dependent Claim
31 words
An integer processing unit for a reduced instruction set computer as claimed in claim 2 further comprising means for activating disabled register window groups to be utilized for handling trap routines.
References Cited (Backward Citations)
US3713096A
Cited
US3735362A
Cited
US4193121A
Cited
US4334305A
Cited
US4493020A
Cited
US4589087A
Cited
US4589065A
Cited
US4733346A
Cited
US4734852A
Cited
US4777588A
Cited
US4833640A
Cited
US4891753A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-20 | 1995-07-22 | 1996-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-20 | 1999-07-22 | 2000-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-20 | 2003-07-22 | 2004-01-21 | $7700.00 | Window Closed / Lapsed |