| 摘要 |
PURPOSE:To cause a central controller to directly control the data in an input- output controller, by providing an address and data registers in a controller and causing the central controller to input a reading-out or writing command for testing by accumulating addresses and, as occasion demands, data. CONSTITUTION:An address register 28 and data register 29 which are accessible from both of a central controller 1 and processor 21 are provided in a controller 200. If the central controller 1 accumulates address in the address register 28 and readout commands for testing in a command register 24, the central controller 1 can read out the data held in the controller 200 when the processor 21 accumulates the data accumulated at a prescribed area of a data holding section 201 designated by the addresses accumulated in the address register 27 in the data register 29. When writing commands for testing are accumulated in the command register 24, the central controller 1 can write data in the controller 200. |
