US4918696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bank initiate error detection
Assignee: Unisys Corp
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Filing: 1988-09-19
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Granted: 1990-04-17
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Expires: 2008-09-19
Abstract
Abstract A multibank computer memory system is provided in which the storage banks monitor the initiate line while each bank operation is being processed to verify that another initiate is not received before it can be processed. This serves to check that the control logic is not in error, and that there is no error between the control section and the banks.
Inventors
- 👤 David M. Purdham
- 👤 James H. Scheuneman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:41
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0706; G06F11/073; G06F11/0751
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
143 words
A bank initiate error detection system for a multibank computer memory system wherein each of said banks of said multibank system comprises, control means responsive to initiate signals for said associated bank for providing a bank busy control signal for said associated bank following an initiate signal to said control means which has initiated a memory operation in said bank, wherein said bank busy signal persists until said memory operation is completed, error initiate means responsive to said associated initiate signals and to said associated bank busy signals for generating initiate error signals when both signals are present, and error means responsive to said associated initiate error signals for indicating when an initiate error occurs due to a second initiate signal being received by said associated bank before the operation associated with a first initiate signal for said associated bank has been completed.
Claim 2
Dependent Claim
143 words
A bank initiate error detection system for a multibank computer memory system wherein each of said banks of said multibank system comprises, control means responsive to initiate signals for said associated bank for providing a bank busy control signal for said associated bank following an initiate signal to said control means which has initiated a memory operation in said bank, wherein said bank busy signal persists until said memory operation is completed, error initiate means responsive to said associated initiate signals and to said associated bank busy signals for generating initiate error signals when both signals are present, and error means responsive to said associated initiate error signals for indicating when an initiate error occurs due to a second initiate signal being received by said associated bank before the operation associated with a first initiate signal for said associated bank has been completed.
Claim 3
Dependent Claim
64 words
A bank initiate error detection system as claimed in claim 1 wherein said error initiate means comprises error latch means and said error means provides a hold error enable signal to said error latch means upon the receipt of said second initiate signal to enable said error latch means to maintain an indicated initiate error signal until said hold error enable signal is terminated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-16 | 1993-10-16 | 1994-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-16 | 1997-10-16 | 1998-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-16 | 2001-10-16 | 2002-04-17 | $7700.00 | Window Closed / Lapsed |