| 摘要 |
Adjunct virtual machines are disclosed that are connected to an existing base virtual machine to provide for the creation of service processors each providing a service to the base virtual machine. All communication with the user takes place through one console that is shared by the base virtual machine and its adjunct virtual machine. That is, all messages and responses between the base virtual machine and the adjunct virtual machines are directed to only one console such that each adjunct machine does not require its own separate console. Even though only one console is used, there is no requirement for one machine to log off while an operating system control program (SCP) function is executing in the other machine. As a result, implementation of the adjunct virtual machine permits the construction of host SCP console functions that have sustaining dialogs with the user while all other SCP functions are available to the user during the dialog. A single directory is used to define the architecture of the adjunct virtual machine which can be used, as a prototype, by all base virtual machines. The adjunct machine gains control when it is dispatched with a suitable program status word. |
