Patent
1997-01-23
1998-07-14
Toplu, Lucien U.
395652, G06F 946
Patent
active
057817553
ABSTRACT:
A virtual machine system comprised of a real machine having a virtual machine control monitor including an initial program loading emulation part and a virtual machine and an outer memory connected to the real machine. A virtual machine assist mechanism is provided in the real machine for offering a control mechanism of the virtual machine by firmware. At an initial program loading stage, when an input-output substitutional generation command is generated at the initial program loading emulation part in the virtual machine control monitor, an actual data transmission is executed from the outer memory to the area of the virtual machine, as if an input-output request were generated at the virtual machine. In addition, an input-output interruption after the execution of data transmission is transferred from the outer memory to the virtual machine assist mechanism by the control of the input-output substitutional generation command. Accordingly, an initial program loading emulation is executed independently of the initializing program of the operating system and the volume of the initial program loading emulation program is thereby reduced.
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Fujitsu Limited
Toplu Lucien U.
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