发明授权
US4891752A Multimode expanded memory space addressing system using independently
generated DMA channel selection and DMA page address signals
失效
使用独立生成的DMA通道选择和DMA页面地址信号的多模扩展存储器空间寻址系统
- 专利标题： Multimode expanded memory space addressing system using independently generated DMA channel selection and DMA page address signals
- 专利标题（中）： 使用独立生成的DMA通道选择和DMA页面地址信号的多模扩展存储器空间寻址系统
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申请号： US20964申请日： 1987-03-03
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公开(公告)号： US4891752A公开(公告)日： 1990-01-02
- 发明人: Bruce A. Fairman , Allen J. Larsen , William G. Swinton , Robert G. Taylor, Jr.
- 申请人： Bruce A. Fairman , Allen J. Larsen , William G. Swinton , Robert G. Taylor, Jr.
- 申请人地址： CA Moorpark
- 专利权人： Tandon Corporation
- 当前专利权人： Tandon Corporation
- 当前专利权人地址： CA Moorpark
- 主分类号： G06F12/06
- IPC分类号： G06F12/06 ; G06F12/02 ; G06F12/10 ; G06F13/28 ; G06F13/32
摘要：
A computer system includes a computer address modification system that is advantageously coupled in a bus network to selectively translate memory address data in 16K blocks and provide DMA page addresses which may match the 16K memory address blocks. The modification system includes a mapping RAM selectively providing translated addresses to enable addresses in a 1 megabyte address space to be selectively mapped to a 16 megabyte extended address space. The modification system also includes a page register storing for each addressable 16K block of data for each DMA channel a page address within the extended address space.
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