会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 9. 发明专利
    • DE2854485C2
    • 1986-02-06
    • DE2854485
    • 1978-12-16
    • HONEYWELL INFORMATION SYSTEMS INC., WALTHAM, MASS., US
    • HOLTEY, THOMAS O., NEWTON LOWER FALLS, MASS., USJOYCE, THOMAS F., BURLINGTON, MASS., US
    • G06F12/08G06F13/16G06F13/14
    • A data processing system having a system bus; a plurality of system units including a main memory, a cache memory, a central processing unit (CPU) and a communications controller all connected in parallel to the system bus. The controller operates to supervise interconnection between the units via the system bus to transfer data therebetween, and the CPU includes a memory request device for generating data requests in response to the CPU. The cache memory includes a private interface connecting the CPU to the cache memory for permitting direct transmission of data requests from the CPU to the cache memory and direct transmission of requested data from the cache memory to the CPU; a cache directory and data buffer for evaluating the data requests to determine when the requested data is not present in the cache memory; and a system bus interface connecting the cache memory to the system bus for obtaining CPU requested data not found in the cache memory from the main memory via the system bus in response to the cache directory and data buffer. The cache memory may also include replacement and update apparatus for determining when the system bus is transmitting data to be written into a specific address in main memory and for replacing the data in a corresponding specific address in the cache memory with the data then on the system bus.