Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Patent
1996-09-11
1998-08-04
Teska, Kevin J.
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
395375, 395712, 39580004, 395868, 395870, 711 2, 711203, G06F 1208, G06F 930
Patent
active
057908370
ABSTRACT:
A technique for providing device virtualization in an MS-DOS based operating environment, using an interrupt request (e.g., a non-maskable interrupt), is described. The technique includes executing an application on a processor within the MS-DOS based operating environment and, when the application attempts to address the device to be emulated, causing a processor interrupt to occur. In response to the interrupt, the processor executes code representing the virtualization of a device. The code for servicing the interrupt and emulating the device are written in protected-mode code, stored in the extended memory area, and made available by making appropriate entries into the interrupt descriptor tables (IDTs) for the protected-mode contexts which exist for the native protected-mode operating systems and for the DOS extender. The entries made into the IDT for the protected-mode context established for the DOS extender are accomplished by intercepting communications between the DOS extender and the virtual control program interface (VCPI).
REFERENCES:
patent: 5293590 (1994-03-01), Keener et al.
patent: 5303378 (1994-04-01), Cohen
patent: 5390332 (1995-02-01), Golson
patent: 5459869 (1995-10-01), Spilo
"Virtual Control Program Interface," Version 1.0, Jun. 12, 1989, (22 pages).
Encyclopedia of Computer Science, Third Edition, IEEE Press (1993), p. 486.
Microprocessors, "386.TM. DX Microprocessor," Intel (1989), pp. 4-190-4-191.
King, Adrian, "Inside Windows.TM. 95," Chapter 2, Microsoft Press, pp. 33-43.
"Microsoft MS-DOS 6 User's Guide", Microsoft Corporation (1993), pp. 87-89 and pp. 131-132.
Friel Joseph T.
Weir Andrew P.
Ensoniq Corporation
Phan Thai
Teska Kevin J.
LandOfFree
Method and system for device virtualization based on an interrup does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and system for device virtualization based on an interrup, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for device virtualization based on an interrup will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1189186