| 摘要 |
PURPOSE:To transfer an amount of data corresponding several lines simultaneously required for history-based control, efficiently and at high speed, by combining several shift registers, gates for logical operations on outputs from the shift registers and a signal-switching circuit for changing the flow of data signals. CONSTITUTION:When a signal-switching circuit is in a state (a), the AND of data obtained by inverting (N-2)th line data and (N-1)th line data with N-th line data is logically determined while the data is transferred from the signal- switching circuit 3 to a head. Simultaneously, the (N-1)th line data is inputted to shift registers A, B, whereas the N-th line data is inputted to a shift register C. When the circuit 3 is in a state (b), the AND of data obtained by inverting the (N-1)th line data with the N-th line data is transferred, and the (N-1)th line data is again inputted to the registers A, B, whereas the N-th line data is again inputted to the register C. When the circuit 3 is in a state (c), only the N-th line data is transferred, and the (N-1)th line data is inputted to the register A, whereas the N-th line data is inputted to the register B, and data for the next line is inputted to the register C. |
