Computer system with post execution I/O emulation

Details Computer system with post execution I/O emulation Computer system with post execution I/O emulation

1973-12-26

1976-02-10

Zache, Raulfe B.

Communications: electrical

Digital comparator systems

G06F 300

Patent

active

039381013

ABSTRACT:
A computer system executes instructions for an I/O device not attached to the system. A quasi I/O attachment device is responsive to the commands for the unattached I/O device and generates an interrupt condition. The interrupt condition causes the command instructions for the unattached I/O device to be translated to command instructions for an I/O device connected to the computer system. The I/O device attached to the system performs the designated operation and generates associated I/O device status data. This associated I/O device status data is translated into I/O device status data for the unattached I/O device and thus permits a program for operating an unattached I/O device to operate instead an I/O device attached to the system which otherwise could not be operated by that program. A second embodiment performs the emulation of the unattached I/O device remotely of the central processing unit in the computer system.

REFERENCES:
patent: 3374466 (1968-03-01), Hanf et al.
patent: 3544969 (1970-12-01), Rakoczi et al.
patent: 3593300 (1971-07-01), Driscoll, Jr. et al.
patent: 3675214 (1972-07-01), Ellis et al.
patent: 3710328 (1973-01-01), Hunter et al.
patent: 3721961 (1973-03-01), Edstrom et al.
patent: 3751645 (1973-08-01), Brandsma et al.
hall, P. H. et al., "Multimode Programmable Machines," IBM Tech. Disc. Bull., Vol. 15, No. 1, June 1972, pp. 243-244.
Tucker, S. G., "Emulation of Large Systems," in Communications of the ACM, Vol. 8, No. 12, Dec. 1965.
Mallach, E. G.; "Emulation: A Survey," in Honeywell Computer Journal, Vol. 6, No. 4, 1972.
Benjamin, R. I., "The Spectra 70/45 Emulator for the RCA 301," in Communications of the ACM, Vol. 8, No. 12, Dec. 1965.
McCormack, M. A. et al., "1401 Compatibility Feature on the IBM System/360 Model 30," in Communications of the ACM, Vol. 8, No. 12, Dec. 1965.

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