| 摘要 |
PURPOSE:To attain access corresponding to a main storage device storing area (PSA) access generating cause and to speed up processing by setting up a host PSA to be required for host interruption processing and host dividing processing as an exclusive PSA corresponding to each processing. CONSTITUTION:A corresponding PSA address is outputted from a PSA address output part 14 in response to a dividing request from a virtual computer 12 and a value obtained by adding an intra-PSA relative address to said address is outputted from an adder 243. A PSW for the dividing processing is read out from a dividing PSA 104 in a host 10 to a register 18 by using the added value and the processing is started. A corresponding PSA address is outputted from a PSA address output part 14 in response to host interruption and a value obtained by adding the PSA address to the address is outputted from the adder 243. Then, a PSA for the processing is read out from a host PSA 103 by using the value and the processing is started. |
