| 摘要 |
A peripheral interface for use with a control computer and a peripheral device. The peripheral interface has a controller receiving an input data stream from the control computer and delivering an output data stream to the peripheral device, the controller obtaining an instruction from the input data stream for a modification of the output data stream. Prior art devices transfer data streams for peripheral devices blockwise by means of DMA using peripheral interfaces. In conventional peripheral interfaces, a burdensome real-time operating system must be used on the control computer in order have a sufficiently short reaction time to bring about a continuous, uninterrupted data stream. The invention achieves the object using a non-real-time operating system. A data stream is generated in the control computer, comprising control data (Bn) for the peripheral device and a segment (SOS) having spare control data to be output in case of a break in the data stream, and a leading spare data marking, particularly a jump command (JMP) past the spare control data. The data stream is received in the peripheral interface, and output to the peripheral device, wherein an instruction for a modification of the output of the data stream is identified in the received data stream, and the data stream is modified for output according to the identified instruction.
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