| 摘要 |
PURPOSE:To increase the processing ability, by obtaining the information as to line number, in selecting absolute address of registers of a line connection adaptor. CONSTITUTION:A register LCNR is set via an AND circuit A1 with a signal S1 and the information on a bus B2, and the line number bit appears at a bus B4. A bus B6 indicates the line number with the bus B4 and a signal S3 to finally obtain the line number of an LCA on a bus B7 and the register number. The line number is set to the register LCNR and all the processings are not made in the address selection every time, allowing to obtain the register address with the line number at the head set to the LCNR automatically only with the virtual address access. |
