| 摘要 |
PURPOSE:To recognize the driving state of each magnetic disc optionally by a software and to use the driving state as control information, by providing the driving part of each magnetic disc with a register holding the magnetic disc controlling information and reading out the controlling information by a command. CONSTITUTION:A CPU6 specifies the address of a channel controlling word and a channel address/magnetic disc driving address prepared on a main storage device 7 to start a channel 5. The channel 5 decodes the control word and sends a command to a magnetic disc controlling device 1 to read out the contents of magnetic disc controlling information registers 4a-4n. The device 1 reads out the contents of the register 4 of the specified address. The read-out information is transferred to the specified area on the main storage device 7 through the channel 5. The CPU6 uses the magnetic disc controlling information read out from the area of the main storage device 7 for various control. |
