| 摘要 |
PURPOSE:To reduce the quantity of hardware of a communication control equipment by providing a memory which holds numerous combinations of answer information commonly to plural circuits. CONSTITUTION:When a transmission controlling section 220 receives a next transmitting character request signal from a character buffer section 231i of the i-th circuit, the section 220 reads out a circuit state word for the i-th circuit in a circuit state word holding section 221. When an answer information effective bit is ''1'', the controlling section 220 does not make any DMA transmitting process and reads out one character from an answer information holding memory 224 by means of an answer information memory address contained in the circuit state word, and then, decrements the lowest two bits of the answer information memory address after setting the one character in the character buffer section 231i. |
