Title:
INPUT/OUTPUT DATA TRANSFER PROCESSING DEVICE
Document Type and Number:
Japanese Patent JP3261715
Kind Code:
B2
Abstract:
PURPOSE: To provide the device which prevents the occurrence of data overrun and constitutes an efficient processing system independent of system configuration and processing concentration.
CONSTITUTION: An arithmetic processing device 1 which transfers data between a main storage device 2 and an input/output device 9 based on transfer command information stored in the main storage device 2 is provided. A channel device 7 is provided with a buffer part 71 to eliminate the difference of the transfer rate between the main storage device 2 and the peripheral controller 8, and this channel device is provided with means 75 and 76, and the means 75 outputs a data transfer request to an input/output processing device 4 in accordance with the output of a buffer management means 73 which disscriminates effective data or the number of empty areas in the buffer in accordance with the transfer direction, and the means 76 outputs a data transfer request having a high priority level to the input/output processing device 4 when forecasting the occurrence of data overrun based on the data transfer rate between the peripheral controller 8 and the channel device 7 and the output of the buffer management means 73.
Inventors:
Hiroaki Oshida
Application Number:
JP35620691A
Publication Date:
March 04, 2002
Filing Date:
December 24, 1991
Export Citation:
Assignee:
NEC
International Classes:
G06F13/12; G06F13/38; (IPC1-7): G06F13/12; G06F13/38
Domestic Patent References:
| JP3240852A | ||||
| JP59132028A |
Attorney, Agent or Firm:
Isamu Takahashi
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