Present bit recycle and detect logic for a memory management unit
    1.
    发明公开
    Present bit recycle and detect logic for a memory management unit 失效
    Anwesenheitsbit-Regenerierungs- und-Erkennungslogikfüreine Speicherverwaltungseinheit。

    公开(公告)号:EP0291558A1

    公开(公告)日:1988-11-23

    申请号:EP87107472.0

    申请日:1987-05-22

    IPC分类号: G06F12/10

    CPC分类号: G06F12/1036

    摘要: A data processing system includes a logical address to a physical address translator in an extended memory management unit. A 128 word memory stores task segment descriptor words which include a base address. A 16 word memory stores corresponding present bits to indicate if the addressed task segment descriptor is present in its memory. This arrangement allows a 128 word memory to be cleared in 16 memory cycles.

    摘要翻译: 数据处理系统包括到扩展存储器管理单元中的物理地址转换器的逻辑地址。 128字存储器存储包括基地址的任务段描述符字。 16字存储器存储对应的当前位以指示所寻址的任务段描述符是否存在于其存储器中。 这种布置允许在16个存储器周期中清除128个字存储器。

    Hardware demand fetch cycle system interface
    2.
    发明公开
    Hardware demand fetch cycle system interface 失效
    Anlagenschnittstelle mit Hardware-Abrufzyklus。

    公开(公告)号:EP0291557A1

    公开(公告)日:1988-11-23

    申请号:EP87107471.2

    申请日:1987-05-22

    IPC分类号: G06F12/10

    CPC分类号: G06F12/1054

    摘要: A data processing system includes a central processor unit (CPU), a main memory and a memory management unit (MMU). Information is stored in main memory in segments, each segment being identified by a segment descriptor stored in a translation table in the MMU. Logical addresses from the CPU address segment descriptors in the MMU's translation table. These segment descriptors include the physical address of the location in main memory of the first word of the segment. If the segment descriptor is not in the translation table location, then the MMU operation is suspended while the segment descriptor is demand fetched from main memory.

    摘要翻译: 数据处理系统包括中央处理器单元(CPU),主存储器和存储器管理单元(MMU)。 信息以片段存储在主存储器中,每个段由存储在MMU中的转换表中的段描述符标识。 MMU翻译表中CPU地址段描述符的逻辑地址。 这些段描述符包括段的第一个单词的主存储器中的位置的物理地址。 如果段描述符不在转换表位置,则MMU操作被暂停,而段描述符是从主存储器获取请求。