发明授权
US5790887A Method and apparatus for processing programmed input/output (PIO)
operations in a computer system
失效
用于在计算机系统中处理编程输入/输出(PIO)操作的方法和装置
- 专利标题: Method and apparatus for processing programmed input/output (PIO) operations in a computer system
- 专利标题(中): 用于在计算机系统中处理编程输入/输出(PIO)操作的方法和装置
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申请号: US601681申请日: 1996-02-15
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公开(公告)号: US5790887A公开(公告)日: 1998-08-04
- 发明人: Brad Louis Brech
- 申请人: Brad Louis Brech
- 申请人地址: NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: NY Armonk
- 主分类号: G06F13/12
- IPC分类号: G06F13/12 ; G06F9/28
摘要:
A method and apparatus are provided for processing programmed input/output (PIO) operations in a computer system. A batched list of PIO operations is stored in a buffer. Then the batched list of PIO operations is moved as a single system bus operation to an I/O bus interface unit. The I/O bus interface unit includes sequencer logic. The sequencer logic is used for executing the batched list of PIO operations and for providing an ordered sequence of PIO operations to a system I/O bus. The method and apparatus of the invention enhances the use of non-intelligent I/O adapters in a computer system by reducing the overhead of system PIO operations. Also the correctly ordered sequence of PIO commands provided by the sequencer logic facilitates the use of non-intelligent I/O adapters in reduced instruction-set computer (RISC) systems.
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