Boots – shoes – and leggings
Patent
1991-07-25
1995-02-14
Harvey, Jack B.
Boots, shoes, and leggings
3642282, 3642551, 3642553, 3642557, 3642564, 3642565, 364DIG1, G06F 1208, G06F 1210
Patent
active
053903099
ABSTRACT:
A level-2 virtual machine is constructed under the control of a level-1 operating system (OS) operating on a real machine (level-1), and a level-3 virtual machine is constructed under the control of another operating system (OS) operating on the level-2 virtual machine. A level-3 virtual address generated in the level-3 virtual machine is translated to a level-2 virtual address, which is further translated to a level-1 virtual address. A third predetermined main storage address is added to the level-1 virtual address to generate a level-1 absolute address. The translated address is checked as to whether it is within a predetermined area on the main storage.
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"System/370 Extended Architecture: Facilities for Virtual Machines", IBM J. Res. Develop., vol. 27, No. 6, Nov. 1983.
Harvey Jack B.
Hitachi , Ltd.
Whitfield Michael A.
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