发明授权
US5404474A Apparatus and method for addressing a variable sized block of memory
失效
用于寻址可变大小的存储器块的装置和方法
- 专利标题: Apparatus and method for addressing a variable sized block of memory
- 专利标题(中): 用于寻址可变大小的存储器块的装置和方法
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申请号: US819393申请日: 1992-01-10
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公开(公告)号: US5404474A公开(公告)日: 1995-04-04
- 发明人: Neal A. Crook , Stewart F. Bryant , Michael J. Seaman , John M. Lenthall
- 申请人: Neal A. Crook , Stewart F. Bryant , Michael J. Seaman , John M. Lenthall
- 申请人地址: MA Maynard
- 专利权人: Digital Equipment Corporation
- 当前专利权人: Digital Equipment Corporation
- 当前专利权人地址: MA Maynard
- 主分类号: G06F12/02
- IPC分类号: G06F12/02 ; G06F12/06
摘要:
A method and apparatus for aliasing an address for a location in a memory system. The aliasing permits an address generating unit to access a memory block of variable size based upon an address space of fixed size so that the size of the memory block can be changed without changing the address generating software of the address generating unit. The invention provides an address aliasing device arranged to receive an address from the address generating unit. The address aliasing device includes a register that stores memory block size information. The memory block size information is read by the address aliasing device and decoded to provide bit information representative of the size of the memory block. The address aliasing device logically combines the bit information with appropriate corresponding bits of the input address to provide an alias address that is consistent with the size of the memory block.
公开/授权文献
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