| 摘要 |
<p>PURPOSE:To use easily one printer device on plural CPUs at an equal level by providing an output controlling device with a channel switching function. CONSTITUTION:Plural channel ports 201 are connected to a respective CPUs 101 and a channel selection switching circuit 202 validates only one port specified on the basis of an output request from a CPU101 out of these ports 201. A reception controlling circuit 203 receives command data and output data sent through the switching circuit 202 and output these data to a data analysing circuit 204. The analysing circuit 204 analyses the command data, outputs a command instruction to a printing part 210 through a command output circuit 205 and also receives output data from the reception controlling circuit 203 in accordance with the output timing of the analysing circuit 204 and sends the output data to the printer part 210 through a data output circuit 206.</p> |
