US5499378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Small computer system emulator for non-local SCSI devices
Assignee: International Business Machines Corp
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Filing: 1994-06-21
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Granted: 1996-03-12
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Expires: 2014-06-21
Abstract
Abstract A SCSI computer system is provided whereby a host computer gains access to a targeted but non-local peripheral device, which device or devices are individually responsive to either SCSI or non-SCSI commands, by sending SCSI commands via a SCSI bus to a connected SCSI target computer which emulates the targeted peripheral device local to the SCSI target computer, whether the targeted peripheral device is responsive to only SCSI or only non-SCSI commands, to cause the targeted peripheral device to carry out the initial SCSI commands.
Inventors
- 👤 Andrew B. McNeill, Jr.
- 👤 Edward I. Wachtel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:33
CPC Classifications
G; G06; G06F; G06F13/00; G06F13/10; G06F13/102; G06F13/38; G06F13/382; G06F13/385
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A computer network system of two computers having BIOS software dependency wherein the first computer accesses a remote peripheral device of the second computer, comprising: a first computer including a first Small Computer System Interface (SCSI) adapter; a second computer including a second SCSI adapter with at least one remote peripheral device; a SCSI bus communications link between the first and second SCSI adapters; and memory resident emulation means in the second computer emulating a SCSI remote peripheral device for direct access of the SCSI remote peripheral device by the first computer and emulating a non-SCSI remote peripheral device for direct access of the non-SCSI remote peripheral device by the first computer upon command by the first computer and providing for proper sharing of any BIOS software interrupt which supports remote peripheral device access by both the first and second computers upon command by the first computer such that proper hardware and software priority operation is maintained and providing synchronization procedures to preclude BIOS software interrupt recursion.
Claim 2
Dependent Claim
167 words
A computer network system of two computers having BIOS software dependency wherein the first computer accesses a remote peripheral device of the second computer, comprising: a first computer including a first Small Computer System Interface (SCSI) adapter; a second computer including a second SCSI adapter with at least one remote peripheral device; a SCSI bus communications link between the first and second SCSI adapters; and memory resident emulation means in the second computer emulating a SCSI remote peripheral device for direct access of the SCSI remote peripheral device by the first computer and emulating a non-SCSI remote peripheral device for direct access of the non-SCSI remote peripheral device by the first computer upon command by the first computer and providing for proper sharing of any BIOS software interrupt which supports remote peripheral device access by both the first and second computers upon command by the first computer such that proper hardware and software priority operation is maintained and providing synchronization procedures to preclude BIOS software interrupt recursion.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-12 | 1999-09-11 | 2000-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-12 | 2003-09-11 | 2004-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-12 | 2007-09-11 | 2008-03-12 | $7700.00 | Window Closed / Lapsed |