| 摘要 |
PURPOSE:To quickly perform switching between a host and a guest by selecting and accessing a host resource or a guest resource in accordance with the value of a mode line at the time of detecting the access to a resource. CONSTITUTION:A host resource 11 and a guest resource 12 are provided as the resource, and the mode line indicating the host or the guest is provided, and the address is so modified that the host resource 11 is accessed in case of access to the resource at the time of indicating the host by the mode line and the quest resource 12 is accessed in case of access to the resource at the time of indicating the guest by the mode line. When the host is switched to the quest, it is sufficient if the mode line is switched to the guest side and the guest resource 12 is set, and it is unnecessary to save the host resource 11, and switching is quickly performed. When the guest is switched to the host, it is sufficient if the mode line is switched to the host side, and host environments are quickly restored. |
