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Image generating apparatus with FIFO memory and cache memory

  • US 6,141,025 A
  • Filed: 02/02/1998
  • Issued: 10/31/2000
  • Est. Priority Date: 02/06/1996
  • Status: Expired due to Term
First Claim
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1. A picture generating apparatus comprising:

  • drawing means for generating pixel data items each including an address and pixel data according to picture information sequentially;

    a transient memory for storing the pixel data items generated by the drawing means and for generating pixel data items sequentially from the stored pixel data;

    a cache memory;

    a frame memory for storing pixel data;

    first control means for writing pixel data of the output pixel data items into the cache memory according to addresses thereof; and

    second control means for reading an address of the pixel data item stored in the transient memory before the pixel data item is output,wherein the second control means retrieves pixel data in the cache memory to detect pixel data whose address has a given part of the same value as that of the read address and which satisfies a given condition, and accesses the frame memory to cache pixel data located at the read address and pixel data located at the address of the detected pixel data, into the cache memory at one time.

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