System for determining from a command storing in a storage circu

Details System for determining from a command storing in a storage circu System for determining from a command storing in a storage circu

1997-09-12

1999-03-23

Lee, Thomas C.

395825, G06F 1206

Patent

active

058871900

ABSTRACT:
An input/output control unit which provides a large amount of input/output address space divisible into areas each of which is a multiple of the system memory management unit page size and thus may be allotted to only one of the individual application programs using a computer system by an input/output device driver. The control unit is able to determine from command addresses provided by the application programs both the application program which is involved in the operation and the address area which has been allotted solely to that application program. This use of these addresses in the input/output address space which have been allotted solely to one application program allows the application programs to write directly to the input/output devices while still maintaining the integrity of the system.

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