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    2.
    发明专利
    未知

    公开(公告)号：BR7702776A

    公开(公告)日：1978-02-21

    申请号：BR7702776

    申请日：1977-04-29

    Applicant: IBM

    Inventor： BIRNEY R ,  GRAYBIEL L ,  DAVIS M

    IPC: G06F9/312 ,  G06F11/00 ,  G06F12/14 ,  G06F13/12 ,  G06F21/24 ,  G06F9/06 ,  H01H43/08

    Abstract: The disclosure describes instruction operated controls for loading or storing address key values into or from one or more address key register sections in a key-register-controlled addressing system. The controls load or store one or all key register sections of an address key register (AKR) in a processor from or to a word in either a main memory or a general purpose register (GPR). Both the load or store controls are operated by the same instruction format, in which one field indicates whether the operation is to be a load or store of the designated AKR section(s). Another field designates one AKR section, or all AKR sections, which are to be loaded or stored. A still further field designates whether the operation is to be from or to main memory or a GPR. The disclosure provides circuits which operate with microcode to perform these operations.

    3.
    发明专利
    未知

    公开(公告)号：BR7702820A

    公开(公告)日：1978-04-04

    申请号：BR7702820

    申请日：1977-05-02

    Applicant: IBM

    Inventor： BIRNEY R ,  HOOD R

    IPC: G06F12/06 ,  G06F12/14 ,  G05B19/10

    Abstract: The disclosure describes equate operand spaces (EOS) control over the addressabilities accessed by means of different address keys in an address key register (AKR) in a processor. Executing instructions, and their source and sink type operands may have different address keys in the AKR, and therefore different addressabilities. When enabled, the EOS control forces each source operand fetch to occur within the sink operand addressability specified in the AKR, even though the AKR explicitly contains a different addressability for source operands. When the EOS feature is disabled, the source operand addressability contained in the AKR is used when fetching source operands. An EOS field in the AKR stores whether the EOS state is enabled or disabled in the processor.

    4.
    发明专利
    未知

    公开(公告)号：BR7702780A

    公开(公告)日：1978-02-21

    申请号：BR7702780

    申请日：1977-04-27

    Applicant: IBM

    Inventor： HOOD R ,  DAVIS M ,  BIRNEY R

    IPC: G06F12/06 ,  G06F12/14 ,  G11C7/00 ,  H01H43/08

    Abstract: System mode controls for obtaining limited addressability for supervisor programming operations without disturbing a user address key currently contained in a user key register (UKR).

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