发明名称 |
Control of peripheral devices in a multitasking system. |
摘要 |
<p>A multitasking data processing system for executing a plurality of processes includes a peripheral device addressable through two ports. A peripheral device controller is provided that includes the capability of (1) allowing access to only a single process for accessing the peripheral device and (2) the capability to provide access to a first process while simultaneously and concurrently providing access to a second process to a second port.</p> |
申请公布号 |
EP0442728(A2) |
申请公布日期 |
1991.08.21 |
申请号 |
EP19910301175 |
申请日期 |
1991.02.13 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
FLURRY, GREGORY ALAN;HENSON, LARRY WILLIAM |
分类号 |
G06F9/46;G06F13/10 |
主分类号 |
G06F9/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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