| 摘要 |
<p>PURPOSE:To simplify the hardware by processing the cursor position alteration indication via the software not via the hardware. CONSTITUTION:The key input concerning the cursor shift, if given from keyboard KB9, is supplied to CPU1 via KB-C8, I/O bus interface part 23 and I/O bus 12 each. Thus the cursor display position alteration is carried out in accordance with each key input signal, and at the same time the writing is performed to cursor address register 24. When the ordinary character row input is given from KB9, CPU1 knows from which position on the screen the character row is supplied based on the cursor display position memorized in the software as well as the character row.</p> |
