| 摘要 |
PURPOSE:To improve the economical efficiency of a computer or the like by using one address register for both the specification of a storage device address and a byte position in a buffer. CONSTITUTION:A writing address register is constituted of a high-order address register 11-1 holding a high-order digit part and a low-order address register 11-2 holding a low-order digit part. An output 30 from the low-order address register 11-2 specifies the byte position of the buffer 18 storing the output byte of a data processing part 17. The register 11-2 is counted up in each byte processing through an increment circuit 32. A carried value from the most significant digit at the increment operation of the register 11-2 is held by a carrying holding circuit 34 constituted of a flip flop and having an object to delay the carrying. Therefore, the carried value can be prevented from being immediately transmitted to the upper address register 11-1 and changed at its contents. |
