US5113500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple cooperating and concurrently operating processors using individually dedicated memories
Assignee: Unisys Corp
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Filing: 1989-08-23
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Granted: 1992-05-12
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Expires: 2009-08-23
Abstract
Abstract A personal computer (PC) desktop workstation using a first operating system is enhanced with a single PC bus extension card (SCAMP Board) within its base housing which connects a second computer system (A-Series) having a large memory, control logic and a 2-inchx2-inch IC chip module holding a CPU and control store. The first operating system is organized to act as the I/O and peripheral subsystem for the second computer system so that peripheral connectivity, operational and maintenance interfaces can function with a PC keyboard, screen and peripheral devices. The workstation base housing has a footprint of less than three square feet and six inches height while providing memory and processing ability comparable to mainframe computers which are normally several volumes larger in size.
Inventors
- 👤 Jefferson F. Talbott
- 👤 Richard A. Cowgill
- 👤 Chris R. Cummings
- 👤 James A. Fontana
- 👤 Anthony R. Pitchford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:44
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/10; G06F13/105; G06F13/38; G06F13/382; G06F13/385; G06F15/00; G06F15/16; G06F15/177
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
201 words
A desktop computer system having mainframe capability and enabling concurrent operation of multiple computer means comprising: (a) a first computer means acting as a host and having a first dedicated memory means and first central processing unit and operating on a first operating system, said first dedicated memory means provided program storage for said first operating system and for application programs applicable to said first computer means and for storing I/O commands from a second computer means, said first computer means including: (a1) server means for emulating the I/O commands transmitted from said second computer means into said first dedicated memory means so that said I/O commands are translated into a compatible format for said first computer means to enable data transfer operations between said second computer means and peripheral devices; (b) said second computer means acting as an auxiliary concurrently operating computer having a second dedicated memory means and second processing unit and operating on a second operating system, said second dedicated memory means providing program storage for said second operating system and for application programs using said second operating system, said second computer means including: (b2) means for writing into or reading out of said first dedicated memory means.
Claim 2
Dependent Claim
201 words
A desktop computer system having mainframe capability and enabling concurrent operation of multiple computer means comprising: (a) a first computer means acting as a host and having a first dedicated memory means and first central processing unit and operating on a first operating system, said first dedicated memory means provided program storage for said first operating system and for application programs applicable to said first computer means and for storing I/O commands from a second computer means, said first computer means including: (a1) server means for emulating the I/O commands transmitted from said second computer means into said first dedicated memory means so that said I/O commands are translated into a compatible format for said first computer means to enable data transfer operations between said second computer means and peripheral devices; (b) said second computer means acting as an auxiliary concurrently operating computer having a second dedicated memory means and second processing unit and operating on a second operating system, said second dedicated memory means providing program storage for said second operating system and for application programs using said second operating system, said second computer means including: (b2) means for writing into or reading out of said first dedicated memory means.
Claim 3
Dependent Claim
25 words
The system of claim 1 wherein said peripheral devices include: (f1) a screen monitor unit; (f2) an internal disk unit; (f3) an internal tape unit.
Claim 4
Dependent Claim
33 words
The system of claim 1 wherein said first and second computer means are housed in a desktop cabinet having a footprint of less than 3 square feet and height less than 6 inches.
Claim 5
Dependent Claim
44 words
The system of claim 3 wherein said second computer means includes a second central processing unit (CPU), a memory control unit, said second dedicated memory means and an interface logic subsystem on a printed circuit board of less than 51 square inches in area.
Claim 6
Dependent Claim
30 words
The combination of claim 4 wherein said second central processing unit (CPU) includes a microcode memory on an integrated circuit chip module of less than 4 square inches in area.
References Cited (Backward Citations)
US4530052A
Cited
US4679166A
Cited
US4591975A
Cited
US4945470A
Cited
US4882674A
Cited
US4722048A
Cited
US4747040A
Cited
US4920481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |