| 摘要 |
<p>DATA PROCESSING SYSTEM WITH VIRTUAL MACHINES A data processing system comprising at least two operating systems (OSl, OS2) for virtual machines, a supervisory operating system, i.e., a control program (CP) for controlling the operating systems, control registers (CR0, CRl, ---), and an extended control register (ECR) having a special bit. When a control register operating instruction (LCTC or STCTC) is generated from the operating systems under the condition that the special bit has a first value, the operating systems directly access the control register. When such a control register operating instruction is generated under the condition that the special bit has a second value, an interruption is generated in the supervisory operating system.</p> |
